Spracherkennung für: .gi vermutete Sprache: Unknown {[0] [0] [0]} [Methode: Schwerpunktbildung, einfache Gewichte, sechs Dimensionen]
#############################################################################
##
#W gobject.gi XGAP library Frank Celler
##
##
#Y Copyright 1995-1997, Lehrstuhl D fuer Mathematik, RWTH Aachen, Germany
#Y Copyright 1997, Frank Celler, Huerth, Germany
#Y Copyright 1998, Max Neunhoeffer, Aachen, Germany
##
#############################################################################
##
#R IsGraphicObjectRep . . . . . . . . . . . . . . . default representation
##
DeclareRepresentation( "IsGraphicObjectRep",
IsComponentObjectRep,
[ "sheet", "color", "user" ],
IsGraphicObject );
#############################################################################
##
#M GraphicObject( <representation>, <sheet>, <def> ) . . create a template
##
InstallMethod( GraphicObject,
"for a representation, a graphic sheet, and defaults",
true,
[ IsFunction, IsGraphicSheet, IsRecord ], 0,
function( repres, sheet, def )
local obj;
# fill default record
if not IsBound( def.color ) then
if not IsMutable( def ) then def:= ShallowCopy( def ); fi;
def.color := DefaultsForGraphicObject( sheet ).color;
fi;
if not IsBound( def.width ) then
if not IsMutable( def ) then def:= ShallowCopy( def ); fi;
def.width := DefaultsForGraphicObject( sheet ).width;
fi;
if not IsBound( def.label ) then
if not IsMutable( def ) then def:= ShallowCopy( def ); fi;
def.label := DefaultsForGraphicObject( sheet ).label;
fi;
# create a template
obj := Objectify( NewType( GraphicObjectFamily,
repres and IsAlive ),
rec() );
obj!.sheet := sheet;
obj!.color := def.color;
obj!.user := rec(); # for user
# add object to list of objects stored in <S>
if IsEmpty( sheet!.free ) then
Add( sheet!.objects, obj );
else
sheet!.objects[sheet!.free[Length(sheet!.free)]] := obj;
Unbind(sheet!.free[Length(sheet!.free)]);
fi;
# and return
return obj;
end );
#############################################################################
##
#M ViewObj( <object> ) . . . . . . . . . . . . pretty print a graphic object
##
InstallMethod( ViewObj,
"for graphic object",
true,
[ IsGraphicObject ],
0,
function( obj )
if IsAlive(obj) then
Print( "<graphic object>" );
else
Print( "<dead graphic object>" );
fi;
end );
#############################################################################
##
#M WindowId( <gobject> ) . for graphic object, return window id of the sheet
##
InstallOtherMethod( WindowId,
"for graphic object",
true,
[ IsGraphicObject and IsGraphicObjectRep ],
0,
obj -> WindowId( obj!.sheet ) );
#############################################################################
##
#M Delete( <object> ) . . . . . . . delete a graphic object from its sheet
##
InstallOtherMethod( Delete,
"for a graphic object",
true,
[ IsGraphicObject and IsGraphicObjectRep ],
0,
function( obj )
Delete( obj!.sheet, obj );
end );
#############################################################################
##
#M \=( <gobject>, <gobject> ) . . . . . . . . comparison of graphic objects
##
## Two graphic objects are to be considered equal w.r.t. \= iff they are
## actually the same objects! This makes "Position" work!
##
InstallOtherMethod( \=,
"for two graphic objects",
IsIdenticalObj,
[ IsGraphicObject and IsGraphicObjectRep,
IsGraphicObject and IsGraphicObjectRep ],
0,
ReturnFalse
);
#############################################################################
## Implementation of Boxes:
#############################################################################
##
#R IsBoxObjectRep . . . . . . . . . . . . . . . . . default representation
##
DeclareRepresentation( "IsBoxObjectRep",
IsGraphicObjectRep,
[ "id", "x", "y", "w", "h" ],
IsGraphicObject );
#############################################################################
##
#M Box( <sheet>, <x>, <y>, <w>, <h> ) . . . . . . . . draw a box in a sheet
#M Box( <sheet>, <x>, <y>, <w>, <h>, <defaults> ) . . draw a box in a sheet
##
## creates a new graphic object, namely a filled black box, on the graphic
## sheet <sheet> and returns a {\GAP} record describing this object. The
## four corners of the box are $(<x>,<y>)$, $(<x>+<w>,<y>)$,
## $(<x>+<w>,<y>+<h>)$, and $(<x>,<y>+<h>)$.
##
## Note that the box is $<w>+1$ pixel wide and $<h>+1$ pixels high.
##
## If a record <defaults> is given and contains a component `color' of value
## <color>, the function works like the first version of `Box', except
## that the color of the box will be <color>. See "Color Models" for how
## to select a <color>.
##
## See "table of operations for graphic objects" for a list of operations
## that apply to boxes.
##
InstallMethod( Box,
"for sheet, four integers, and record of defaults",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt,
IsInt,
IsRecord ],
0,
function( sheet, x, y, w, h, def )
local box;
# create a box object in <sheet>
box := GraphicObject( IsBoxObjectRep, sheet, def );
box!.x := x;
box!.y := y;
box!.w := w;
box!.h := h;
# Id's are always non-negative, so Draw knows that not yet drawn
box!.id := -1;
# draw the Box and get the identifier
Draw(box);
# and return
return box;
end );
InstallOtherMethod( Box,
"using default from sheet",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt,
IsInt ],
0,
function( sheet, x, y, w, h )
return Box( sheet, x, y, w, h, DefaultsForGraphicObject(sheet) );
end );
#############################################################################
##
#M Draw( <box> ) . . . . . . . . . . . . . . . . . . . . . . . . draw a box
##
InstallMethod( Draw,
"for a box",
true,
[ IsGraphicObject and IsBoxObjectRep and IsAlive ],
0,
function( box )
# If already on screen, destroy first
if box!.id >= 0 then
WcDestroy(WindowId(box), box!.id);
fi;
# draw the box and get the identifier
WcSetColor( WindowId(box), ColorId(box!.color) );
box!.id := WcDrawBox(WindowId(box),
box!.x, box!.y, box!.x+box!.w, box!.y+box!.h);
end );
#############################################################################
##
#M Destroy( <box> ) . . . . . . . . . . . . . . . . . . . . . destroy <box>
##
InstallMethod( Destroy,
"for a box",
true,
[ IsGraphicObject and IsBoxObjectRep and IsAlive],
0,
function( box )
WcDestroy( WindowId(box), box!.id );
box!.id := -1; # no more on screen, info for Draw, in case of Revive
ResetFilterObj( box, IsAlive );
end );
#############################################################################
##
#M Revive( <box> ) . . . . . . . . . . . . . . . . . . . . . . revive <box>
##
InstallMethod( Revive,
"for a box",
true,
[ IsGraphicObject and IsBoxObjectRep ],
0,
function( box )
if IsAlive(box) then return; fi;
if Position(box!.sheet!.objects,box) = fail then
Error("<box> must be in objlist of sheet");
fi;
SetFilterObj(box,IsAlive);
Draw(box);
end );
#############################################################################
##
#M Move( <box>, <x>, <y> ) . . . . . . . . . . . . . . . . . . absolute move
##
InstallMethod( Move,
"for a box, and two integers",
true,
[ IsGraphicObject and IsBoxObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( box, x, y )
# make sure that we really have to move
if x = box!.x and y = box!.y then return; fi;
# change the position
box!.x := x;
box!.y := y;
# use 'Draw'
Draw(box);
end );
#############################################################################
##
#M MoveDelta( <box>, <dx>, <dy> ) . . . . . . . . . . . . . . . delta move
##
InstallMethod( MoveDelta,
"for a box, and two integers",
true,
[ IsGraphicObject and IsBoxObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( box, dx, dy )
# make sure that we really have to move
if dx = 0 and dy = 0 then return; fi;
# change the dimension
box!.x := box!.x + dx;
box!.y := box!.y + dy;
# use 'Draw'
Draw(box);
end );
#############################################################################
##
#M PSString( <box> ) . . . . . . . . . . . . . . . return PostScript string
##
InstallMethod( PSString,
"for a box",
true,
[ IsGraphicObject and IsBoxObjectRep ],
0,
box -> Concatenation(
PSColour(box!.color), " setrgbcolor\n",
"newpath\n",
String(box!.x), " ",
String(box!.sheet!.height-box!.y)," moveto\n",
String(box!.x), " ",
String(box!.sheet!.height-box!.y-box!.h)," lineto\n",
String(box!.x+box!.w), " ",
String(box!.sheet!.height-box!.y-box!.h)," lineto\n",
String(box!.x+box!.w), " ",
String(box!.sheet!.height-box!.y)," lineto\n",
String(box!.x), " ",
String(box!.sheet!.height-box!.y)," lineto\n",
"closepath\nfill\n" )
);
#############################################################################
##
#M FigString( <box> ) . . . . . . . . . . . . . . . Fig format string
##
InstallMethod( FigString,
"for a box",
true,
[ IsGraphicObject and IsBoxObjectRep ],
0,
box -> Concatenation("2 2 0 1 ", FigColor(box!.color), " ", FigColor(box!.color), " 50 -1 20 0 0 0 -1 0 0 5\n\t",
String(box!.x), " ", String(box!.y), " ",
String(box!.x+box!.w), " ", String(box!.y), " ",
String(box!.x+box!.w), " ", String(box!.y+box!.h), " ",
String(box!.x), " ", String(box!.y+box!.h), " ",
String(box!.x), " ", String(box!.y), "\n")
);
#############################################################################
##
#M PrintInfo( <box> ) . . . . . . . . . . . . . . . . . print debug message
##
InstallMethod( PrintInfo,
"for a box",
true,
[ IsGraphicObject and IsBoxObjectRep ],
0,
function( box )
Print( "#I Box( ", box!.x, ", ", box!.y, ", ", box!.w, ", ",
box!.h, " ) = ", box!.id, " @ ",
Position(box!.sheet!.objects,box), "\n" );
end );
#############################################################################
##
#M ViewObj( <box> ) . . . . . . . . . . . . . . . . . . pretty print a box
##
InstallMethod( ViewObj,
"for a box",
true,
[ IsGraphicObject and IsBoxObjectRep and IsAlive ],
0,
function( box )
Print( "<box>" );
end );
#############################################################################
##
#M Recolor( <box>, <col> ) . . . . . . . . . . . . . . . . . . change color
##
InstallMethod( Recolor,
"for a box, and a color",
true,
[ IsGraphicObject and IsBoxObjectRep and IsAlive,
IsColor ],
0,
function( box, col )
# set new color
box!.color := col;
# and create new one
Draw(box);
end );
#############################################################################
##
#M Reshape( <box>, <w>, <h> ) . . . . . . . . . . . . . . . . change <box>
##
InstallOtherMethod( Reshape,
"for a box, and two integers",
true,
[ IsGraphicObject and IsBoxObjectRep and IsAlive, IsInt, IsInt ],
0,
function( box, w, h )
# update box dimensions
box!.w := w;
box!.h := h;
# draw a new one
Draw(box);
end );
#############################################################################
##
#M \in( <pos>, <box> ) . . . . . . . . . . . . . . . . . . . <pos> in <box>
##
InstallMethod( \in,
"for a pair of integers, and a box",
true,
[ IsList and IsCyclotomicCollection,
IsGraphicObject and IsBoxObjectRep and IsAlive ],
0,
function( pos, box )
local ax, ay, ix, iy;
ax := Maximum( box!.x, box!.x+box!.w );
ix := Minimum( box!.x, box!.x+box!.w );
ay := Maximum( box!.y, box!.y+box!.h );
iy := Minimum( box!.y, box!.y+box!.h );
return ix <= pos[1] and pos[1] <= ax and iy <= pos[2] and pos[2] <= ay;
end );
#############################################################################
## Implementation of Circles:
#############################################################################
##
#R IsCircleObjectRep . . . . . . . . . . . . . . . . default representation
##
DeclareRepresentation( "IsCircleObjectRep",
IsGraphicObjectRep,
[ "id", "x", "y", "r", "width" ],
IsGraphicObject );
#############################################################################
##
#M Circle( <sheet>, <x>, <y>, <r> ) . . . . . . . draw a circle in a sheet
#M Circle( <sheet>, <x>, <y>, <r>, <defaults>) . . draw a circle in a sheet
##
InstallMethod( Circle,
"for sheet, three integers, and record of defaults",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt,
IsRecord ],
0,
function( sheet, x, y, r, def )
local circle;
# create a circle object in <sheet>
circle := GraphicObject( IsCircleObjectRep, sheet, def );
circle!.x := x;
circle!.y := y;
circle!.r := Maximum( 1, AbsInt(r) );
circle!.width := def.width;
# Id's are always non-negative, so Draw knows that not yet drawn
circle!.id := -1;
# draw the circle and get the identifier
Draw(circle);
# and return
return circle;
end );
InstallOtherMethod( Circle,
"using default from sheet",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt ],
0,
function( sheet, x, y, r )
return Circle( sheet, x, y, r, DefaultsForGraphicObject(sheet) );
end );
#############################################################################
##
#M Draw( <circle> ) . . . . . . . . . . . . . . . . . . . . . draw a circle
##
InstallMethod( Draw,
"for a circle",
true,
[ IsGraphicObject and IsCircleObjectRep and IsAlive ],
0,
function( circle )
# draw the circle and get the identifier
WcSetColor( WindowId(circle), ColorId(circle!.color) );
WcSetLineWidth( WindowId(circle), circle!.width );
if circle!.id >= 0 then # Is already on screen, so destroy first!
WcDestroy(WindowId(circle), circle!.id);
fi;
circle!.id := WcDrawCircle( WindowId(circle), circle!.x, circle!.y,
circle!.r );
end );
#############################################################################
##
#M Destroy( <circle> ) . . . . . . . . . . . . . . . . . . . destroy circle
##
InstallMethod( Destroy,
"for a circle",
true,
[ IsGraphicObject and IsCircleObjectRep and IsAlive],
0,
function( circle )
WcDestroy( WindowId(circle), circle!.id );
circle!.id := -1; # no more on screen, info for Draw, in case of Revive
ResetFilterObj( circle, IsAlive );
end );
#############################################################################
##
#M Revive( <circle> ) . . . . . . . . . . . . . . . . . . . revive <circle>
##
InstallMethod( Revive,
"for a circle",
true,
[ IsGraphicObject and IsCircleObjectRep ],
0,
function( circle )
if IsAlive(circle) then return; fi;
if Position(circle!.sheet!.objects,circle) = fail then
Error("<circle> must be in objlist of sheet");
fi;
SetFilterObj(circle,IsAlive);
Draw(circle);
end );
#############################################################################
##
#M Move( <circle>, <x>, <y> ) . . . . . . . . . . . . . . . . absolute move
##
InstallMethod( Move,
"for a circle, and two integers",
true,
[ IsGraphicObject and IsCircleObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( circle, x, y )
# make sure that we really have to move
if x = circle!.x and y = circle!.y then return; fi;
# change the position
circle!.x := x;
circle!.y := y;
# use 'Draw'
Draw(circle);
end );
#############################################################################
##
#M MoveDelta( <circle>, <dx>, <dy> ) . . . . . . . . . . . . . . delta move
##
InstallMethod( MoveDelta,
"for a circle, and two integers",
true,
[ IsGraphicObject and IsCircleObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( circle, dx, dy )
# make sure that we really have to move
if dx = 0 and dy = 0 then return; fi;
# change the dimension
circle!.x := circle!.x + dx;
circle!.y := circle!.y + dy;
# use 'Draw'
Draw(circle);
end );
#############################################################################
##
#M PSString( <circle> ) . . . . . . . . . . . . . output Postscript-String
##
InstallMethod( PSString,
"for a circle",
true,
[ IsGraphicObject and IsCircleObjectRep ],
0,
circle -> Concatenation(
PSColour(circle!.color), " setrgbcolor\n",
"newpath\n",
String(circle!.x), " ", String(circle!.sheet!.height-circle!.y),
" ", String(circle!.r), " 0 360 arc\n",
String(circle!.width), " setlinewidth\n",
"stroke\n" )
);
#############################################################################
##
#M FigString( <circle> ) . . . . . . . . . . . . . Fig string
##
InstallMethod( FigString,
"for a circle",
true,
[ IsGraphicObject and IsCircleObjectRep ],
0,
circle -> Concatenation("1 3 0 ", String(circle!.width), " ", FigColor(circle!.color), " 0 50 -1 -1 0 1 0 ",
String(circle!.x), " ", String(circle!.y), " ",
String(circle!.r), " ", String(circle!.r), " ",
String(circle!.x), " ", String(circle!.y), " ",
String(circle!.x + circle!.r), " ", String(circle!.y), "\n")
);
#############################################################################
##
#M PrintInfo( <circle> ) . . . . . . . . . . . . . . . . print debug message
##
InstallMethod( PrintInfo,
"for a circle",
true,
[ IsGraphicObject and IsCircleObjectRep ],
0,
function( circle )
Print( "#I Circle( ", circle!.x, ", ", circle!.y, ", ",
circle!.r, " ) = ", circle!.id, " @ ",
Position(circle!.sheet!.objects,circle), "\n" );
end );
#############################################################################
##
#M ViewObj( <circle> ) . . . . . . . . . . . . . . . . pretty print a circle
##
InstallMethod( ViewObj,
"for a circle",
true,
[ IsGraphicObject and IsCircleObjectRep and IsAlive ],
0,
function( circle )
Print( "<circle>" );
end );
#############################################################################
##
#M Recolor( <circle>, <col> ) . . . . . . . . . . . . . . . . change color
##
InstallMethod( Recolor,
"for a circle, and a color",
true,
[ IsGraphicObject and IsCircleObjectRep and IsAlive,
IsColor ],
0,
function( circle, col )
# set new color
circle!.color := col;
# and create new one
Draw(circle);
end );
#############################################################################
##
#M Reshape( <circle>, <r> ) . . . . . . . . . . . . . . . . . change circle
##
InstallOtherMethod( Reshape,
"for a circle, and an integer",
true,
[ IsGraphicObject and IsCircleObjectRep and IsAlive, IsInt ],
0,
function( circle, r )
# update circle radius
circle!.r := r;
# draw a new one
Draw(circle);
end );
#############################################################################
##
#M SetWidth( <circle>, <width> ) . . . . . . . . . . . . . . . change circle
##
InstallOtherMethod( SetWidth,
"for a circle, and an integer",
true,
[ IsGraphicObject and IsCircleObjectRep and IsAlive, IsInt ],
0,
function( circle, width )
# update circle line width
circle!.width := width;
# draw a new one
Draw(circle);
end );
#############################################################################
##
#M \in( <pos>, <circle> ) . . . . . . . . . . . . . . . . <pos> in <circle>
##
InstallMethod( \in,
"for a pair of integers, and a box",
true,
[ IsList and IsCyclotomicCollection,
IsGraphicObject and IsCircleObjectRep and IsAlive ],
0,
function( pos, circle )
return (pos[1]-circle!.x)^2+(pos[2]-circle!.y)^2 < (circle!.r+3)^2;
end );
#############################################################################
## Implementation of Discs:
#############################################################################
##
#R IsDiscObjectRep . . . . . . . . . . . . . . . . . default representation
##
DeclareRepresentation( "IsDiscObjectRep",
IsGraphicObjectRep,
[ "id", "x", "y", "r" ],
IsGraphicObject );
#############################################################################
##
#M Disc( <sheet>, <x>, <y>, <r> ) . . . . . . . . . draw a disc in a sheet
#M Disc( <sheet>, <x>, <y>, <r>, <defaults> ) . . . draw a disc in a sheet
##
InstallMethod( Disc,
"for sheet, three integers, and record of defaults",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt,
IsRecord ],
0,
function( sheet, x, y, r, def )
local disc;
# create a disc object in <sheet>
disc := GraphicObject( IsDiscObjectRep, sheet, def );
disc!.x := x;
disc!.y := y;
disc!.r := Maximum( 1, AbsInt(r) );
# Id's are always non-negative, so Draw knows that not yet drawn
disc!.id := -1;
# draw the disc and get the identifier
Draw(disc);
# and return
return disc;
end );
InstallOtherMethod( Disc,
"using default from sheet",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt ],
0,
function( sheet, x, y, r )
return Disc( sheet, x, y, r, DefaultsForGraphicObject(sheet) );
end );
#############################################################################
##
#M Draw( <disc> ) . . . . . . . . . . . . . . . . . . . . . . . draw a disc
##
InstallMethod( Draw,
"for a disc",
true,
[ IsGraphicObject and IsDiscObjectRep and IsAlive ],
0,
function( disc )
# If already on screen, destroy first
if disc!.id >= 0 then
WcDestroy(WindowId(disc), disc!.id);
fi;
# draw the disc and get the identifier
WcSetColor( WindowId(disc), ColorId(disc!.color) );
disc!.id := WcDrawDisc( WindowId(disc), disc!.x, disc!.y, disc!.r );
end );
#############################################################################
##
#M Destroy( <disc> ) . . . . . . . . . . . . . . . . . . . . . destroy disc
##
InstallMethod( Destroy,
"for a disc",
true,
[ IsGraphicObject and IsDiscObjectRep and IsAlive],
0,
function( disc )
WcDestroy( WindowId(disc), disc!.id );
disc!.id := -1; # no more on screen, info for Draw, in case of Revive
ResetFilterObj( disc, IsAlive );
end );
#############################################################################
##
#M Revive( <disc> ) . . . . . . . . . . . . . . . . . . . . . revive <disc>
##
InstallMethod( Revive,
"for a disc",
true,
[ IsGraphicObject and IsDiscObjectRep ],
0,
function( disc )
if IsAlive(disc) then return; fi;
if Position(disc!.sheet!.objects,disc) = fail then
Error("<disc> must be in objlist of sheet");
fi;
SetFilterObj(disc,IsAlive);
Draw(disc);
end );
#############################################################################
##
#M Move( <disc>, <x>, <y> ) . . . . . . . . . . . . . . . . . absolute move
##
InstallMethod( Move,
"for a disc, and two integers",
true,
[ IsGraphicObject and IsDiscObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( disc, x, y )
# make sure that we really have to move
if x = disc!.x and y = disc!.y then return; fi;
# change the position
disc!.x := x;
disc!.y := y;
# use 'Draw'
Draw(disc);
end );
#############################################################################
##
#M MoveDelta( <disc>, <dx>, <dy> ) . . . . . . . . . . . . . . . delta move
##
InstallMethod( MoveDelta,
"for a disc, and two integers",
true,
[ IsGraphicObject and IsDiscObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( disc, dx, dy )
# make sure that we really have to move
if dx = 0 and dy = 0 then return; fi;
# change the dimension
disc!.x := disc!.x + dx;
disc!.y := disc!.y + dy;
# use 'Draw'
Draw(disc);
end );
#############################################################################
##
#M PSString( <disc> ) . . . . . . . . . . . . . . output Postscript-String
##
InstallMethod( PSString,
"for a disc",
true,
[ IsGraphicObject and IsDiscObjectRep ],
0,
disc -> Concatenation(
PSColour(disc!.color), " setrgbcolor\n",
"newpath\n",
String(disc!.x), " ", String(disc!.sheet!.height-disc!.y), " ",
String(disc!.r), " 0 360 arc\nfill\n" )
);
#############################################################################
##
#M FigString( <disc> ) . . . . . . . . . . . . . Fig string
##
InstallMethod( FigString,
"for a disc",
true,
[ IsGraphicObject and IsDiscObjectRep ],
0,
disc -> Concatenation("1 3 0 1 ", FigColor(disc!.color), " ", FigColor(disc!.color), " 50 -1 20 0 1 0 ",
String(disc!.x), " ", String(disc!.y), " ",
String(disc!.r), " ", String(disc!.r), " ",
String(disc!.x), " ", String(disc!.y), " ",
String(disc!.x + disc!.r), " ", String(disc!.y), "\n")
);
#############################################################################
##
#M PrintInfo( <disc> ) . . . . . . . . . . . . . . . . print debug message
##
InstallMethod( PrintInfo,
"for a disc",
true,
[ IsGraphicObject and IsDiscObjectRep ],
0,
function( disc )
Print( "#I Disc( ", disc!.x, ", ", disc!.y, ", ",
disc!.r, " ) = ", disc!.id, " @ ",
Position(disc!.sheet!.objects,disc), "\n" );
end );
#############################################################################
##
#M ViewObj( <disc> ) . . . . . . . . . . . . . . . . . pretty print a disc
##
InstallMethod( ViewObj,
"for a disc",
true,
[ IsGraphicObject and IsDiscObjectRep and IsAlive ],
0,
function( disc )
Print( "<disc>" );
end );
#############################################################################
##
#M Recolor( <disc>, <col> ) . . . . . . . . . . . . . . . . . change color
##
InstallMethod( Recolor,
"for a disc, and a color",
true,
[ IsGraphicObject and IsDiscObjectRep and IsAlive,
IsColor ],
0,
function( disc, col )
# set new color
disc!.color := col;
# and create new one
Draw(disc);
end );
#############################################################################
##
#M Reshape( <disc>, <r> ) . . . . . . . . . . . . . . . . . . . change disc
##
InstallOtherMethod( Reshape,
"for a disc, and an integer",
true,
[ IsGraphicObject and IsDiscObjectRep and IsAlive, IsInt ],
0,
function( disc, r )
# update disc radius
disc!.r := r;
# draw a new one
Draw(disc);
end );
#############################################################################
##
#M \in( <pos>, <disc> ) . . . . . . . . . . . . . . . . <pos> in <disc>
##
InstallMethod( \in,
"for a pair of integers, and a box",
true,
[ IsList and IsCyclotomicCollection,
IsGraphicObject and IsDiscObjectRep and IsAlive ],
0,
function( pos, disc )
return (pos[1]-disc!.x)^2+(pos[2]-disc!.y)^2 <= (disc!.r)^2;
end );
#############################################################################
## Implementation of Diamonds:
#############################################################################
##
#R IsDiamondObjectRep . . . . . . . . . . . . . . . default representation
##
DeclareRepresentation( "IsDiamondObjectRep",
IsGraphicObjectRep,
[ "id", "x", "y", "w", "h", "width" ],
IsGraphicObject );
#############################################################################
##
#M Diamond( <sheet>, <x>, <y>, <w>, <h> ) . . . . draw a diamond in a sheet
#M Diamond( <sheet>, <x>, <y>, <w>, <h>, <defaults> ) . . . . . . . . . dito
##
InstallMethod( Diamond,
"for sheet, four integers, and record of defaults",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt,
IsInt,
IsRecord ],
0,
function( sheet, x, y, w, h, def )
local dia;
# create a diamond object in <sheet>
dia := GraphicObject( IsDiamondObjectRep, sheet, def );
dia!.x := x;
dia!.y := y;
dia!.w := w;
dia!.h := h;
dia!.width := def.width;
# Empty, so Draw knows that not yet drawn
dia!.ids := [-1,-1,-1,-1];
# draw the Diamond and get the identifier
Draw(dia);
# and return
return dia;
end );
InstallOtherMethod( Diamond,
"using default from sheet",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt,
IsInt ],
0,
function( sheet, x, y, w, h )
return Diamond( sheet, x, y, w, h, DefaultsForGraphicObject(sheet) );
end );
#############################################################################
##
#M Draw( <dia> ) . . . . . . . . . . . . . . . . . . . . . . draw a diamond
##
InstallMethod( Draw,
"for a diamond",
true,
[ IsGraphicObject and IsDiamondObjectRep and IsAlive ],
0,
function( dia )
local x1, y1, x2, y2, x3, y3, x4, y4;
# create the four corners
x1 := dia!.x;
y1 := dia!.y;
x2 := dia!.x + dia!.w;
y2 := dia!.y + dia!.h;
x3 := 2*x2-x1;
y3 := y1;
x4 := x2;
y4 := 2*y1-y2;
# If already on screen, destroy first
if not dia!.ids[1] = -1 then
WcDestroyFlat(WindowId(dia), dia!.ids);
fi;
# draw the diamond and get the identifier
WcSetColor( WindowId(dia), ColorId(dia!.color) );
WcSetLineWidth( WindowId(dia), dia!.width );
dia!.ids[1] := WcDrawLine( WindowId(dia), x1, y1, x2, y2 );
dia!.ids[2] := WcDrawLine( WindowId(dia), x2, y2, x3, y3 );
dia!.ids[3] := WcDrawLine( WindowId(dia), x3, y3, x4, y4 );
dia!.ids[4] := WcDrawLine( WindowId(dia), x4, y4, x1, y1 );
end );
#############################################################################
##
#M Destroy( <dia> ) . . . . . . . . . . . . . . . . . . . . . destroy <dia>
##
InstallMethod( Destroy,
"for a diamond",
true,
[ IsGraphicObject and IsDiamondObjectRep and IsAlive],
0,
function( dia )
WcDestroyFlat( WindowId(dia), dia!.ids );
# no more on screen, info for Draw, in case of Revive
dia!.ids := [-1,-1,-1,-1];
ResetFilterObj( dia, IsAlive );
end );
#############################################################################
##
#M Revive( <dia> ) . . . . . . . . . . . . . . . . . . . . . . revive <dia>
##
InstallMethod( Revive,
"for a diamond",
true,
[ IsGraphicObject and IsDiamondObjectRep ],
0,
function( dia )
if IsAlive(dia) then return; fi;
if Position(dia!.sheet!.objects,dia) = fail then
Error("<diamond> must be in objlist of sheet");
fi;
SetFilterObj(dia,IsAlive);
Draw(dia);
end );
#############################################################################
##
#M Move( <dia>, <x>, <y> ) . . . . . . . . . . . . . . . . . . absolute move
##
InstallMethod( Move,
"for a diamond, and two integers",
true,
[ IsGraphicObject and IsDiamondObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( dia, x, y )
# make sure that we really have to move
if x = dia!.x and y = dia!.y then return; fi;
# change the position
dia!.x := x;
dia!.y := y;
# use 'Draw'
Draw(dia);
end );
#############################################################################
##
#M MoveDelta( <dia>, <dx>, <dy> ) . . . . . . . . . . . . . . . delta move
##
InstallMethod( MoveDelta,
"for a diamond, and two integers",
true,
[ IsGraphicObject and IsDiamondObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( dia, dx, dy )
# make sure that we really have to move
if dx = 0 and dy = 0 then return; fi;
# change the dimension
dia!.x := dia!.x + dx;
dia!.y := dia!.y + dy;
# use 'Draw'
Draw(dia);
end );
#############################################################################
##
#M PSString( <dia> ) . . . . . . . . . . . . . . Postscript string for <dia>
##
InstallMethod( PSString,
"for a diamond",
true,
[ IsGraphicObject and IsDiamondObjectRep ],
0,
function (dia)
local x1, x2, x3, x4, y1, y2, y3, y4;
# create the four corners, transform y-coordinate
x1 := dia!.x;
y1 := dia!.y;
x2 := dia!.x + dia!.w;
y2 := dia!.y + dia!.h;
x3 := 2*x2-x1;
y3 := y1;
x4 := x2;
y4 := 2*y1-y2;
y1 := dia!.sheet!.height - y1;
y2 := dia!.sheet!.height - y2;
y3 := dia!.sheet!.height - y3;
y4 := dia!.sheet!.height - y4;
return Concatenation(
PSColour(dia!.color), " setrgbcolor\n",
"newpath\n",
String(x1), " ", String(y1), " moveto\n",
String(x2), " ", String(y2), " lineto\n",
String(x3), " ", String(y3), " lineto\n",
String(x4), " ", String(y4), " lineto\n",
String(x1), " ", String(y1), " lineto\n",
String(dia!.width), " setlinewidth\n",
"closepath\nstroke\n" );
end );
#############################################################################
##
#M FigString( <dia> ) . . . . . . . . . . . . . . Fig format string for <dia>
##
InstallMethod( FigString,
"for a diamond",
true,
[ IsGraphicObject and IsDiamondObjectRep ],
0,
function (dia)
local x1, x2, x3, x4, y1, y2, y3, y4;
# create the four corners, transform y-coordinate
x1 := dia!.x;
y1 := dia!.y;
x2 := dia!.x + dia!.w;
y2 := dia!.y + dia!.h;
x3 := 2*x2-x1;
y3 := y1;
x4 := x2;
y4 := 2*y1-y2;
return Concatenation("2 3 0 ", String(dia!.width), " ", FigColour(dia!.color),
" 0 50 -1 -1 0.0 0 0 -1 0 0 5\n\t",
String(x1), " ", String(y1), " ",
String(x2), " ", String(y2), " ",
String(x3), " ", String(y3), " ",
String(x4), " ", String(y4), " ",
String(x1), " ", String(y1), "\n");
end );
#############################################################################
##
#M PrintInfo( <dia> ) . . . . . . . . . . . . . . . . . print debug message
##
InstallMethod( PrintInfo,
"for a diamond",
true,
[ IsGraphicObject and IsDiamondObjectRep ],
0,
function( dia )
Print( "#I Diamond( ", dia!.x, ", ", dia!.y, ", ",
dia!.w, ", ", dia!.h, " ) = ", dia!.ids[1], "+",
dia!.ids[2], "+", dia!.ids[3], "+", dia!.ids[4], " @ ",
Position(dia!.sheet!.objects,dia), "\n" );
end );
#############################################################################
##
#M ViewObj( <dia> ) . . . . . . . . . . . . . . . . pretty print a diamond
##
InstallMethod( ViewObj,
"for a diamond",
true,
[ IsGraphicObject and IsDiamondObjectRep and IsAlive ],
0,
function( dia )
Print( "<diamond>" );
end );
#############################################################################
##
#M Recolor( <dia>, <col> ) . . . . . . . . . . . . . . . . . . change color
##
InstallMethod( Recolor,
"for a diamond, and a color",
true,
[ IsGraphicObject and IsDiamondObjectRep and IsAlive,
IsColor ],
0,
function( dia, col )
# set new color
dia!.color := col;
# and create new one
Draw(dia);
end );
#############################################################################
##
#M Reshape( <dia>, <w>, <h> ) . . . . . . . . . . . . . . . . change <dia>
##
InstallOtherMethod( Reshape,
"for a diamond, and two integers",
true,
[ IsGraphicObject and IsDiamondObjectRep and IsAlive, IsInt, IsInt ],
0,
function( dia, w, h )
# update diamond dimensions
dia!.w := w;
dia!.h := h;
# draw a new one
Draw(dia);
end );
#############################################################################
##
#M SetWidth( <dia>, <width> ) . . . . . . . . . . . . . . . . change diamond
##
InstallOtherMethod( SetWidth,
"for a diamond, and an integer",
true,
[ IsGraphicObject and IsDiamondObjectRep and IsAlive, IsInt ],
0,
function( dia, width )
# update diamond line width
dia!.width := width;
# draw a new one
Draw(dia);
end );
#############################################################################
##
#M \in( <pos>, <dia> ) . . . . . . . . . . . . . . . . . . . <pos> in <dia>
##
InstallMethod( \in,
"for a pair of integers, and a diamond",
true,
[ IsList and IsCyclotomicCollection,
IsGraphicObject and IsDiamondObjectRep and IsAlive ],
0,
function( pos, dia )
local x1, x3, y2, y4;
# create the four corners, transform y-coordinate
x1 := dia!.x;
x3 := dia!.x+2*dia!.w;
y2 := dia!.y + dia!.h;
y4 := 2*dia!.y-y2;
return Minimum( x1, x3 ) <= pos[1]
and pos[1] <= Maximum( x1, x3 )
and Minimum( y2, y4 ) <= pos[2]
and pos[2] <= Maximum( y2, y4 );
end );
#############################################################################
## Implementation of Rectangles:
#############################################################################
##
#R IsRectangleObjectRep . . . . . . . . . . . . . . default representation
##
DeclareRepresentation( "IsRectangleObjectRep",
IsGraphicObjectRep,
[ "id", "x", "y", "w", "h", "width" ],
IsGraphicObject );
#############################################################################
##
#M Rectangle( <sheet>, <x>, <y>, <w>, <h> ) . . draw a rectangle in a sheet
#M Rectangle( <sheet>, <x>, <y>, <w>, <h>, <defaults> ) . . . . . . . . dito
##
InstallMethod( Rectangle,
"for sheet, four integers, and record of defaults",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt,
IsInt,
IsRecord ],
0,
function( sheet, x, y, w, h, def )
local rect;
# create a rectangle object in <sheet>
rect := GraphicObject( IsRectangleObjectRep, sheet, def );
rect!.x := x;
rect!.y := y;
rect!.w := w;
rect!.h := h;
rect!.width := def.width;
# Empty, so Draw knows that not yet drawn
rect!.ids := [-1,-1,-1,-1];
# draw the Rectangle and get the identifier
Draw(rect);
# and return
return rect;
end );
InstallOtherMethod( Rectangle,
"using default from sheet",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt,
IsInt ],
0,
function( sheet, x, y, w, h )
return Rectangle( sheet, x, y, w, h, DefaultsForGraphicObject(sheet) );
end );
#############################################################################
##
#M Draw( <rect> ) . . . . . . . . . . . . . . . . . . . . . draw a rectangle
##
InstallMethod( Draw,
"for a rectangle",
true,
[ IsGraphicObject and IsRectangleObjectRep and IsAlive ],
0,
function( rect )
local x1, y1, x2, y2, x3, y3, x4, y4;
# create the four corners
x1 := rect!.x;
y1 := rect!.y;
x2 := x1;
y2 := y1 + rect!.h;
x3 := x1 + rect!.w;
y3 := y2;
x4 := x3;
y4 := y1;
# If already on screen, destroy first
if not rect!.ids[1] = -1 then
WcDestroyFlat(WindowId(rect), rect!.ids);
fi;
# draw the rectangle and get the identifier
WcSetColor( WindowId(rect), ColorId(rect!.color) );
WcSetLineWidth( WindowId(rect), rect!.width );
rect!.ids[1] := WcDrawLine( WindowId(rect), x1, y1, x2, y2 );
rect!.ids[2] := WcDrawLine( WindowId(rect), x2, y2, x3, y3 );
rect!.ids[3] := WcDrawLine( WindowId(rect), x3, y3, x4, y4 );
rect!.ids[4] := WcDrawLine( WindowId(rect), x4, y4, x1, y1 );
end );
#############################################################################
##
#M Destroy( <rect> ) . . . . . . . . . . . . . . . . . . . . destroy <rect>
##
InstallMethod( Destroy,
"for a rectangle",
true,
[ IsGraphicObject and IsRectangleObjectRep and IsAlive],
0,
function( rect )
WcDestroyFlat( WindowId(rect), rect!.ids );
# no more on screen, info for Draw, in case of Revive
rect!.ids := [-1,-1,-1,-1];
ResetFilterObj( rect, IsAlive );
end );
#############################################################################
##
#M Revive( <rect> ) . . . . . . . . . . . . . . . . . . . . . revive <rect>
##
InstallMethod( Revive,
"for a rectangle",
true,
[ IsGraphicObject and IsRectangleObjectRep ],
0,
function( rect )
if IsAlive(rect) then return; fi;
if Position(rect!.sheet!.objects,rect) = fail then
Error("<rectangle> must be in objlist of sheet");
fi;
SetFilterObj(rect,IsAlive);
Draw(rect);
end );
#############################################################################
##
#M Move( <rect>, <x>, <y> ) . . . . . . . . . . . . . . . . . absolute move
##
InstallMethod( Move,
"for a rectangle, and two integers",
true,
[ IsGraphicObject and IsRectangleObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( rect, x, y )
# make sure that we really have to move
if x = rect!.x and y = rect!.y then return; fi;
# change the position
rect!.x := x;
rect!.y := y;
# use 'Draw'
Draw(rect);
end );
#############################################################################
##
#M MoveDelta( <rect>, <dx>, <dy> ) . . . . . . . . . . . . . . . delta move
##
InstallMethod( MoveDelta,
"for a rectangle, and two integers",
true,
[ IsGraphicObject and IsRectangleObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( rect, dx, dy )
# make sure that we really have to move
if dx = 0 and dy = 0 then return; fi;
# change the dimension
rect!.x := rect!.x + dx;
rect!.y := rect!.y + dy;
# use 'Draw'
Draw(rect);
end );
#############################################################################
##
#M PSString( <rect> ) . . . . . . . . . . . . . Postscript string for <rect>
##
InstallMethod( PSString,
"for a rectangle",
true,
[ IsGraphicObject and IsRectangleObjectRep ],
0,
function (rect)
local x1, x2, x3, x4, y1, y2, y3, y4;
# create the four corners, transform y-coordinate
x1 := rect!.x;
y1 := rect!.y;
x2 := x1;
y2 := y1 + rect!.h;
x3 := x1 + rect!.w;
y3 := y2;
x4 := x3;
y4 := y1;
y1 := rect!.sheet!.height - y1;
y2 := rect!.sheet!.height - y2;
y3 := rect!.sheet!.height - y3;
y4 := rect!.sheet!.height - y4;
return Concatenation(
PSColour(rect!.color), " setrgbcolor\n",
"newpath\n",
String(x1), " ", String(y1), " moveto\n",
String(x2), " ", String(y2), " lineto\n",
String(x3), " ", String(y3), " lineto\n",
String(x4), " ", String(y4), " lineto\n",
String(x1), " ", String(y1), " lineto\n",
String(rect!.width), " setlinewidth\n",
"closepath\nstroke\n" );
end );
#############################################################################
##
#M FigString( <rect> ) . . . . . . . . . . . . . Fig format string for <rect>
##
InstallMethod( FigString,
"for a rectangle",
true,
[ IsGraphicObject and IsRectangleObjectRep ],
0,
rect -> Concatenation("2 2 0 1 ", FigColor(rect!.color), " 0 50 -1 -1 0 0 0 -1 0 0 5\n\t",
String(rect!.x), " ", String(rect!.y), " ",
String(rect!.x+rect!.w), " ", String(rect!.y), " ",
String(rect!.x+rect!.w), " ", String(rect!.y+rect!.h), " ",
String(rect!.x), " ", String(rect!.y+rect!.h), " ",
String(rect!.x), " ", String(rect!.y), "\n")
);
#############################################################################
##
#M PrintInfo( <rect> ) . . . . . . . . . . . . . . . . . print debug message
##
InstallMethod( PrintInfo,
"for a rectangle",
true,
[ IsGraphicObject and IsRectangleObjectRep ],
0,
function( rect )
Print( "#I Rectangle( ", rect!.x, ", ", rect!.y, ", ",
rect!.w, ", ", rect!.h, " ) = ", rect!.ids[1], "+",
rect!.ids[2], "+", rect!.ids[3], "+", rect!.ids[4], " @ ",
Position(rect!.sheet!.objects,rect), "\n" );
end );
#############################################################################
##
#M ViewObj( <rect> ) . . . . . . . . . . . . . . . pretty print a rectangle
##
InstallMethod( ViewObj,
"for a rectangle",
true,
[ IsGraphicObject and IsRectangleObjectRep and IsAlive ],
0,
function( rect )
Print( "<rectangle>" );
end );
#############################################################################
##
#M Recolor( <rect>, <col> ) . . . . . . . . . . . . . . . . . change color
##
InstallMethod( Recolor,
"for a rectangle, and a color",
true,
[ IsGraphicObject and IsRectangleObjectRep and IsAlive,
IsColor ],
0,
function( rect, col )
# set new color
rect!.color := col;
# and create new one
Draw(rect);
end );
#############################################################################
##
#M Reshape( <rect>, <w>, <h> ) . . . . . . . . . . . . . . . change <rect>
##
InstallOtherMethod( Reshape,
"for a rectangle, and two integers",
true,
[ IsGraphicObject and IsRectangleObjectRep and IsAlive, IsInt, IsInt ],
0,
function( rect, w, h )
# update rectangle dimensions
rect!.w := w;
rect!.h := h;
# draw a new one
Draw(rect);
end );
#############################################################################
##
#M SetWidth( <rect>, <width> ) . . . . . . . . . . . . . . change rectangle
##
InstallOtherMethod( SetWidth,
"for a rectangle, and an integer",
true,
[ IsGraphicObject and IsRectangleObjectRep and IsAlive, IsInt ],
0,
function( rect, width )
# update rectangle line width
rect!.width := width;
# draw a new one
Draw(rect);
end );
#############################################################################
##
#M \in( <pos>, <rect> ) . . . . . . . . . . . . . . . . . . <pos> in <rect>
##
InstallMethod( \in,
"for a pair of integers, and a rectangle",
true,
[ IsList and IsCyclotomicCollection,
IsGraphicObject and IsRectangleObjectRep and IsAlive ],
0,
function( pos, rect )
local x1, x3, y2, y4;
# create the four corners, transform y-coordinate
x1 := rect!.x;
x3 := rect!.x+rect!.w;
y2 := rect!.y;
y4 := rect!.y+rect!.h;
return Minimum( x1, x3 ) <= pos[1]
and pos[1] <= Maximum( x1, x3 )
and Minimum( y2, y4 ) <= pos[2]
and pos[2] <= Maximum( y2, y4 );
end );
#############################################################################
## Implementation of Lines:
#############################################################################
##
#R IsLineObjectRep . . . . . . . . . . . . . . . . . default representation
##
DeclareRepresentation( "IsLineObjectRep",
IsGraphicObjectRep,
[ "id", "x", "y", "w", "h", "width" ],
IsGraphicObject );
#############################################################################
##
#M Line( <sheet>, <x>, <y>, <w>, <h> ) . . . . . . . draw a line in a sheet
#M Line( <sheet>, <x>, <y>, <w>, <h>, <defaults> ) . . . . . . . . . . dito
##
InstallMethod( Line,
"for sheet, four integers, and record of defaults",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt,
IsInt,
IsRecord ],
0,
function( sheet, x, y, w, h, def )
local line;
# create a line object in <sheet>
line := GraphicObject( IsLineObjectRep, sheet, def );
line!.x := x;
line!.y := y;
line!.w := w;
line!.h := h;
line!.width := def.width;
# Empty, so Draw knows that not yet drawn
line!.id := -1;
# Not yet labelled:
line!.label := false;
# draw the Line and get the identifier
Draw(line);
# now the label if applicable:
if IsBound(def.label) and def.label <> false then
Relabel(line,def.label);
fi;
# and return
return line;
end );
InstallOtherMethod( Line,
"using default from sheet",
true,
[ IsGraphicSheet,
IsInt,
IsInt,
IsInt,
IsInt ],
0,
function( sheet, x, y, w, h )
return Line( sheet, x, y, w, h, DefaultsForGraphicObject(sheet) );
end );
#############################################################################
##
#M Draw( <line> ) . . . . . . . . . . . . . . . . . . . . . . . draw a line
##
InstallMethod( Draw,
"for a line",
true,
[ IsGraphicObject and IsLineObjectRep and IsAlive ],
0,
function( line )
# If already on screen, destroy first
if not line!.id = -1 then
WcDestroy(WindowId(line), line!.id);
fi;
# draw the line and get the identifier
WcSetColor( WindowId(line), ColorId(line!.color) );
WcSetLineWidth( WindowId(line), line!.width );
line!.id := WcDrawLine( WindowId(line), line!.x, line!.y,
line!.x+line!.w, line!.y+line!.h );
# is there a label?
if line!.label <> false then
# This is for the case that something with the line changed:
Relabel(line,line!.label!.text);
fi;
end );
#############################################################################
##
#M Destroy( <line> ) . . . . . . . . . . . . . . . . . . . . destroy <line>
##
InstallMethod( Destroy,
"for a line",
true,
[ IsGraphicObject and IsLineObjectRep and IsAlive],
0,
function( line )
if line!.label <> false then
# Label is always deleted when Line destroyed!
Delete( line!.label!.sheet, line!.label);
line!.label := false;
fi;
WcDestroy( WindowId(line), line!.id );
# no more on screen, info for Draw, in case of Revive
line!.id := -1;
ResetFilterObj( line, IsAlive );
end );
#############################################################################
##
#M Revive( <line> ) . . . . . . . . . . . . . . . . . . . . . revive <line>
##
InstallMethod( Revive,
"for a line",
true,
[ IsGraphicObject and IsLineObjectRep ],
0,
function( line )
if IsAlive(line) then return; fi;
if Position(line!.sheet!.objects,line) = fail then
Error("<line> must be in objlist of sheet");
fi;
SetFilterObj(line,IsAlive);
Draw(line); # Label is recreated if present
# Comment: Relabel works regardless of "IsAlive"-State of Label
end );
#############################################################################
##
#M Move( <line>, <x>, <y> ) . . . . . . . . . . . . . . . . . absolute move
##
InstallMethod( Move,
"for a line, and two integers",
true,
[ IsGraphicObject and IsLineObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( line, x, y )
# make sure that we really have to move
if x = line!.x and y = line!.y then return; fi;
# change the position
line!.x := x;
line!.y := y;
# use 'Draw'
Draw(line);
end );
#############################################################################
##
#M MoveDelta( <line>, <dx>, <dy> ) . . . . . . . . . . . . . . . delta move
##
InstallMethod( MoveDelta,
"for a line, and two integers",
true,
[ IsGraphicObject and IsLineObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( line, dx, dy )
# make sure that we really have to move
if dx = 0 and dy = 0 then return; fi;
# change the dimension
line!.x := line!.x + dx;
line!.y := line!.y + dy;
# use 'Draw'
Draw(line);
end );
#############################################################################
##
#M PSString( <line> ) . . . . . . . . . . . . . Postscript string for <line>
##
InstallMethod( PSString,
"for a line",
true,
[ IsGraphicObject and IsLineObjectRep ],
0,
function (line)
return Concatenation(
PSColour(line!.color), " setrgbcolor\n",
"newpath\n",
String(line!.x), " ", String(line!.sheet!.height-line!.y), " moveto\n",
String(line!.x+line!.w), " ",
String(line!.sheet!.height-line!.y-line!.h), " lineto\n",
String(line!.width), " setlinewidth\n",
"stroke\n" );
end );
#############################################################################
##
#M FigString( <line> ) . . . . . . . . . . . . . Fig format string for <line>
##
InstallMethod( FigString,
"for a line",
true,
[ IsGraphicObject and IsLineObjectRep ],
0,
function (line)
return Concatenation("2 1 0 ", String(line!.width), " ", FigColour(line!.color),
" 0 50 -1 -1 0.0 0 0 -1 0 0 2\n\t",
String(line!.x), " ", String(line!.y), " ",
String(line!.x+line!.w), " ", String(line!.y+line!.h), "\n");
end );
#############################################################################
##
#M PrintInfo( <line> ) . . . . . . . . . . . . . . . . . print debug message
##
InstallMethod( PrintInfo,
"for a line",
true,
[ IsGraphicObject and IsLineObjectRep ],
0,
function( line )
Print( "#I Line( ", line!.x, ", ", line!.y, ", ",
line!.w, ", ", line!.h, " ) = ", line!.id, " @ ",
Position(line!.sheet!.objects,line), "\n" );
end );
#############################################################################
##
#M ViewObj( <line> ) . . . . . . . . . . . . . . . . . pretty print a line
##
InstallMethod( ViewObj,
"for a line",
true,
[ IsGraphicObject and IsLineObjectRep and IsAlive ],
0,
function( line )
Print( "<line>" );
end );
#############################################################################
##
#M Recolor( <line>, <col> ) . . . . . . . . . . . . . . . . . change color
##
InstallMethod( Recolor,
"for a line, and a color",
true,
[ IsGraphicObject and IsLineObjectRep and IsAlive,
IsColor ],
0,
function( line, col )
# set new color
line!.color := col;
# and create new one
Draw(line);
#THINK: Recolor Label?
end );
#############################################################################
##
#M Reshape( <line>, <w>, <h> ) . . . . . . . . . . . . . . . change <line>
##
InstallOtherMethod( Reshape,
"for a line, and two integers",
true,
[ IsGraphicObject and IsLineObjectRep and IsAlive, IsInt, IsInt ],
0,
function( line, w, h )
# update line dimensions
line!.w := w;
line!.h := h;
# draw a new one
Draw(line);
end );
#############################################################################
##
#M Change( <line>, <x>, <y>, <w>, <h> ) . . . . . . . . . . . change <line>
##
InstallOtherMethod( Change,
"for a line, and four integers",
true,
[ IsGraphicObject and IsLineObjectRep and IsAlive,
IsInt, IsInt, IsInt, IsInt ],
0,
function( line, x, y, w, h )
# update line dimensions
line!.x := x;
line!.y := y;
line!.w := w;
line!.h := h;
# draw a new one
Draw(line);
end );
#############################################################################
##
#F LabelPosition( <line> ) . . . . . . . . . . . . . . . . position of label
##
InstallMethod( LabelPosition,
"for a line",
true,
[ IsGraphicObject and IsLineObjectRep and IsAlive],
0,
function( line )
local x1, y1, x2, y2, x, y;
if line!.h >= 0 then
x1 := line!.x; x2 := line!.x + line!.w;
y1 := line!.y; y2 := line!.y + line!.h;
else
x1 := line!.x + line!.w; x2 := line!.x;
y1 := line!.y + line!.h; y2 := line!.y;
fi;
x := x1 + QuoInt( x2-x1, 2 );
y := y1 + QuoInt( y2-y1, 2 );
if x1-10*FontInfo(FONTS.tiny)[1] < x2 and
x2 < x1+10*FontInfo(FONTS.tiny)[1] then
x := x + QuoInt(FontInfo(FONTS.tiny)[1],2);
fi;
if y2 < y1+(FontInfo(FONTS.tiny)[2]+FontInfo(FONTS.tiny)[1])*3 then
y := y - QuoInt( FontInfo(FONTS.tiny)[2]+FontInfo(FONTS.tiny)[3], 2 );
fi;
if x2 < x1 then
x := x + FontInfo(FONTS.tiny)[1];
fi;
return [ x, y ];
end );
#############################################################################
##
#M Relabel( <line>, <str> ) . . . . . . . . . . attach str as label to line
##
InstallOtherMethod( Relabel,
"for a line, and a string",
true,
[ IsGraphicObject and IsLineObjectRep and IsAlive, IsString ],
0,
function( line, str )
local pos, col;
if line!.label <> false then
# there is already a label, delete it:
Delete( line!.label!.sheet, line!.label);
fi;
if str = "" then
# Label is to be removed!
line!.label := false;
return;
fi;
# update line dimensions
pos := LabelPosition(line);
col := rec( color := line!.color );
line!.label := Text(line!.sheet,FONTS.tiny,pos[1],pos[2],str,col);
# no redraw necessary because Text already drawn!
end );
#############################################################################
##
#M SetWidth( <line>, <width> ) . . . . . . . . . . . . . . . . . change line
##
InstallOtherMethod( SetWidth,
"for a line, and an integer",
true,
[ IsGraphicObject and IsLineObjectRep and IsAlive, IsInt ],
0,
function( line, width )
# update line line width
line!.width := width;
# draw a new one
Draw(line);
end );
#############################################################################
##
#M \in( <pos>, <line> ) . . . . . . . . . . . . . . . . . . <pos> in <line>
##
InstallMethod( \in,
"for a pair of integers, and a line",
true,
[ IsList and IsCyclotomicCollection,
IsGraphicObject and IsLineObjectRep and IsAlive ],
0,
function( pos, line )
local x, y, ax, ay, ix, iy, x1, y1, x2, y2;
x := pos[1];
y := pos[2];
x1 := line!.x;
y1 := line!.y;
x2 := line!.x+line!.w;
y2 := line!.y+line!.h;
ax := Maximum( x1, x2 );
ix := Minimum( x1, x2 );
ay := Maximum( y1, y2 );
iy := Minimum( y1, y2 );
if 5 < x-ax or 5 < ix-x then
return false;
elif 5 < y-ay or 5 < iy-y then
return false;
elif ax = ix or ay = iy then
return true;
else
return AbsInt((x-x1)*(y2-y1)
/(x2-x1)-(y-y1)) < 5;
fi;
end );
#############################################################################
## Implementation of Texts:
#############################################################################
##
#R IsTextObjectRep . . . . . . . . . . . . . . . . . default representation
##
DeclareRepresentation( "IsTextObjectRep",
IsGraphicObjectRep,
[ "id", "x", "y", "font", "text", "color" ],
IsGraphicObject );
#############################################################################
##
#M Text( <sheet>, <font>, <x>, <y>, <str> ) . . . . . draw a text in a sheet
#M Text( <sheet>, <font>, <x>, <y>, <str>, <defaults>) . . . . . . . . dito
##
InstallMethod( Text,
"for sheet, font, two integers, string, and record of defaults",
true,
[ IsGraphicSheet,
IsFont,
IsInt,
IsInt,
IsString,
IsRecord ],
0,
function( sheet, font, x, y, str, def )
local text;
# create a text object in <sheet>
text := GraphicObject( IsTextObjectRep, sheet, def );
text!.x := x;
text!.y := y;
text!.font := font;
text!.text := ShallowCopy(str);
# Id's are always non-negative, so Draw knows that not yet drawn
text!.id := -1;
# draw the text and get the identifier
Draw(text);
# and return
return text;
end );
InstallOtherMethod( Text,
"using default from sheet",
true,
[ IsGraphicSheet,
IsFont,
IsInt,
IsInt,
IsString ],
0,
function( sheet, font, x, y, str )
return Text( sheet, font, x, y, str, DefaultsForGraphicObject(sheet) );
end );
#############################################################################
##
#M Draw( <text> ) . . . . . . . . . . . . . . . . . . . . . . . draw a text
##
InstallMethod( Draw,
"for a text",
true,
[ IsGraphicObject and IsTextObjectRep and IsAlive ],
0,
function( text )
# draw the text and get the identifier
WcSetColor( WindowId(text), ColorId(text!.color) );
if text!.id >= 0 then # Is already on screen, so destroy first!
WcDestroy(WindowId(text), text!.id);
fi;
text!.id := WcDrawText( WindowId(text), Position(FONTS.fonts,text!.font),
text!.x, text!.y, text!.text );
end );
#############################################################################
##
#M Destroy( <text> ) . . . . . . . . . . . . . . . . . . . . . destroy text
##
InstallMethod( Destroy,
"for a text",
true,
[ IsGraphicObject and IsTextObjectRep and IsAlive],
0,
function( text )
WcDestroy( WindowId(text), text!.id );
text!.id := -1; # no more on screen, info for Draw, in case of Revive
ResetFilterObj( text, IsAlive );
end );
#############################################################################
##
#M Revive( <text> ) . . . . . . . . . . . . . . . . . . . . . revive <text>
##
InstallMethod( Revive,
"for a text",
true,
[ IsGraphicObject and IsTextObjectRep ],
0,
function( text )
if IsAlive(text) then return; fi;
if Position(text!.sheet!.objects,text) = fail then
Error("<text> must be in objlist of sheet");
fi;
SetFilterObj(text,IsAlive);
Draw(text);
end );
#############################################################################
##
#M Move( <text>, <x>, <y> ) . . . . . . . . . . . . . . . . . absolute move
##
InstallMethod( Move,
"for a text, and two integers",
true,
[ IsGraphicObject and IsTextObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( text, x, y )
# make sure that we really have to move
if x = text!.x and y = text!.y then return; fi;
# change the position
text!.x := x;
text!.y := y;
# use 'Draw'
Draw(text);
end );
#############################################################################
##
#M MoveDelta( <text>, <dx>, <dy> ) . . . . . . . . . . . . . . . delta move
##
InstallMethod( MoveDelta,
"for a text, and two integers",
true,
[ IsGraphicObject and IsTextObjectRep and IsAlive,
IsInt,
IsInt ],
0,
function( text, dx, dy )
# make sure that we really have to move
if dx = 0 and dy = 0 then return; fi;
# change the dimension
text!.x := text!.x + dx;
text!.y := text!.y + dy;
# use 'Draw'
Draw(text);
end );
#############################################################################
##
#M PSString( <text> ) . . . . . . . . . . . . . . output Postscript-String
##
InstallMethod( PSString,
"for a text",
true,
[ IsGraphicObject and IsTextObjectRep ],
0,
function(text)
local save_text, c, a, b;
save_text := "";
for c in text!.text do
if c = ')' or c = '(' then
Add( save_text, '\\' );
fi;
Add( save_text, c );
od;
a := QuoInt( FontInfo(text!.font)[1] * 150, 100 );
b := QuoInt( FontInfo(text!.font)[3] * 168, 100 );
return Concatenation(
PSColour(text!.color), " setrgbcolor\n",
"/Courier findfont [", String(b), " 0 0 ", String(a),
" 0 0] makefont setfont\n",
String(text!.x), " ", String(text!.sheet!.height-text!.y), " moveto\n",
"(", save_text, ") show\n" );
end );
#############################################################################
##
#M FigString( <text> ) . . . . . . . . . . . . . . output Fig format String
##
InstallMethod( FigString,
"for a text",
true,
[ IsGraphicObject and IsTextObjectRep ],
0,
function(text)
local fontinfo;
fontinfo:=FontInfo(text!.font);
return Concatenation("4 0 ", FigColour(text!.color), " 50 -1 5 ",
String(fontinfo[1]+fontinfo[2]), " 0 0 ",
String(fontinfo[1]+fontinfo[2]), " ", String(fontinfo[3]*Length(text!.text)), " ",
String(text!.x), " ", String(text!.y), " ",
text!.text, "\\001\n");
end );
#############################################################################
##
#M PrintInfo( <text> ) . . . . . . . . . . . . . . . . . print debug message
##
InstallMethod( PrintInfo,
"for a text",
true,
[ IsGraphicObject and IsTextObjectRep ],
0,
function( text )
--> --------------------
--> maximum size reached
--> --------------------
