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https://gitlab.com/freepascal.org/lazarus/lazarus.git
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cody: lvlgraph: node caption position
git-svn-id: trunk@40313 -
This commit is contained in:
mattias
parent
546ceb480c
commit
2e3efebac9
@ -30,7 +30,7 @@ unit CodyCtrls;
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interface
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uses
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types, math, contnrs, Classes, SysUtils, FPCanvas, FPimage,
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types, math, typinfo, contnrs, Classes, SysUtils, FPCanvas, FPimage,
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LazLogger, AvgLvlTree, ComCtrls, Controls, Graphics, LCLType, Forms;
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type
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@ -381,11 +381,13 @@ type
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property LevelClass: TLvlGraphLevelClass read FLevelClass;
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procedure CreateTopologicalLevels; // create levels from edges
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procedure ScaleNodeDrawSizes(NodeGap, HardMaxTotal, HardMinOneNode, SoftMaxTotal, SoftMinOneNode: integer);
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procedure ScaleNodeDrawSizes(NodeGapAbove, NodeGapBelow, HardMaxTotal, HardMinOneNode, SoftMaxTotal, SoftMinOneNode: integer);
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procedure SetAllNodeDrawSizes(PixelPerWeight: single = 1.0; MinWeight: single = 0.0);
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procedure MarkBackEdges;
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procedure MinimizeCrossings; // set all Node.Position to minimize crossings
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procedure MinimizeOverlappings(MinPos: integer = 0; Gap: integer = 1; aLevel: integer = -1); // set all Node.Position to minimize overlappings
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procedure MinimizeOverlappings(MinPos: integer = 0;
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NodeGapAbove: integer = 1; NodeGapBelow: integer = 1;
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aLevel: integer = -1); // set all Node.Position to minimize overlappings
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procedure SetColors(Palette: TCodyCtrlPalette);
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// debugging
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@ -393,10 +395,6 @@ type
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procedure ConsistencyCheck(WithBackEdge: boolean);
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end;
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const
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DefaultLvlGraphNodeWith = 10;
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DefaultLvlGraphNodeCaptionScale = 0.7;
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type
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TLvlGraphCtrlOption = (
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lgoAutoLayout, // automatic graph layout after graph was changed
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@ -404,8 +402,18 @@ type
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);
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TLvlGraphCtrlOptions = set of TLvlGraphCtrlOption;
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TLvlGraphNodeCaptionPosition = (
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lgncLeft,
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lgncTop,
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lgncRight,
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lgncBottom);
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const
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DefaultLvlGraphCtrlOptions = [lgoAutoLayout,lgoHighlightNodeUnderMouse];
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DefaultLvlGraphNodeWith = 10;
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DefaultLvlGraphNodeCaptionScale = 0.7;
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DefaultLvlGraphNodeGap: TRect = (Left: 2; Top: 1; Right: 2; Bottom: 1);
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DefaultLvlGraphNodeCaptionPosition = lgncTop;
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type
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TLvlGraphControlFlag = (
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@ -420,20 +428,26 @@ type
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TCustomLvlGraphControl = class(TCustomControl)
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private
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FGraph: TLvlGraph;
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FNodeCaptionPosition: TLvlGraphNodeCaptionPosition;
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FNodeGap: TRect;
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FNodeUnderMouse: TLvlGraphNode;
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FNodeCaptionScale: single;
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FNodeWidth: integer;
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FOptions: TLvlGraphCtrlOptions;
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fUpdateLock: integer;
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FFlags: TLvlGraphControlFlags;
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procedure DrawCaptions(const TxtH: integer);
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procedure DrawEdges(Highlighted: boolean);
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procedure DrawNodes;
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procedure SetNodeCaptionPosition(AValue: TLvlGraphNodeCaptionPosition);
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procedure SetNodeCaptionScale(AValue: single);
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procedure SetNodeUnderMouse(AValue: TLvlGraphNode);
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procedure SetNodeWidth(AValue: integer);
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procedure SetOptions(AValue: TLvlGraphCtrlOptions);
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protected
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procedure AutoLayoutLevels(TxtH: LongInt);
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procedure GraphInvalidate(Sender: TObject); virtual;
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procedure GraphStructureChanged(Sender, Element: TObject; {%H-}Operation: TOperation); virtual;
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procedure GraphStructureChanged(Sender, Element: TObject; Operation: TOperation); virtual;
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procedure DoSetBounds(ALeft, ATop, AWidth, AHeight: integer); override;
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procedure Paint; override;
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procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
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@ -442,15 +456,19 @@ type
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destructor Destroy; override;
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procedure EraseBackground({%H-}DC: HDC); override;
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property Graph: TLvlGraph read FGraph;
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procedure AutoLayout(RndColors: boolean = true; NodeGap: integer = 1); virtual;
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procedure AutoLayout(RndColors: boolean = true); virtual;
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procedure Invalidate; override;
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procedure InvalidateAutoLayout;
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procedure BeginUpdate;
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procedure EndUpdate;
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function GetNodeAt(X,Y: integer): TLvlGraphNode;
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property NodeWidth: integer read FNodeWidth write SetNodeWidth default DefaultLvlGraphNodeWith;
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property NodeGap: TRect read FNodeGap write FNodeGap; // used by AutoLayout
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property NodeUnderMouse: TLvlGraphNode read FNodeUnderMouse write SetNodeUnderMouse;
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property Options: TLvlGraphCtrlOptions read FOptions write SetOptions default DefaultLvlGraphCtrlOptions;
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property NodeCaptionScale: single read FNodeCaptionScale write FNodeCaptionScale default DefaultLvlGraphNodeCaptionScale;
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property NodeCaptionScale: single read FNodeCaptionScale write SetNodeCaptionScale default DefaultLvlGraphNodeCaptionScale;
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property NodeCaptionPosition: TLvlGraphNodeCaptionPosition
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read FNodeCaptionPosition write SetNodeCaptionPosition default DefaultLvlGraphNodeCaptionPosition;
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end;
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{ TLvlGraphControl }
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@ -462,6 +480,7 @@ type
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property BorderSpacing;
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property BorderStyle;
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property BorderWidth;
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property Options;
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property Color;
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property Constraints;
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property DragKind;
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@ -512,6 +531,10 @@ function Darker(const c: TColor): TColor; overload;
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function CompareLGNodesByCenterPos(Node1, Node2: Pointer): integer;
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function dbgs(p: TLvlGraphNodeCaptionPosition): string; overload;
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function dbgs(o: TLvlGraphCtrlOption): string; overload;
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function dbgs(Options: TLvlGraphCtrlOptions): string; overload;
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implementation
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procedure FreeTVNodeData(TV: TCustomTreeView);
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@ -665,6 +688,29 @@ begin
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Result:=0;
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end;
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function dbgs(p: TLvlGraphNodeCaptionPosition): string;
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begin
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Result:=GetEnumName(typeinfo(p),ord(p));
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end;
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function dbgs(o: TLvlGraphCtrlOption): string;
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begin
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Result:=GetEnumName(typeinfo(o),ord(o));
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end;
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function dbgs(Options: TLvlGraphCtrlOptions): string;
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var
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o: TLvlGraphCtrlOption;
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begin
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Result:='';
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for o:=Low(TLvlGraphCtrlOption) to high(TLvlGraphCtrlOption) do
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if o in Options then begin
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if Result<>'' then Result+=',';
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Result+=dbgs(o);
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end;
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Result:='['+Result+']';
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end;
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{ TLvlGraphLevel }
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function TLvlGraphLevel.GetNodes(Index: integer): TLvlGraphNode;
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@ -745,8 +791,10 @@ procedure TCustomLvlGraphControl.GraphStructureChanged(Sender,
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begin
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if ((Element is TLvlGraphNode)
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or (Element is TLvlGraphEdge)) then begin
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if Operation=opRemove then begin
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if FNodeUnderMouse=Element then
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FNodeUnderMouse:=nil;
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end;
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debugln(['TCustomLvlGraphControl.GraphStructureChanged ']);
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if lgoAutoLayout in FOptions then
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Include(FFlags,lgcNeedAutoLayout);
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@ -757,7 +805,7 @@ procedure TCustomLvlGraphControl.SetNodeWidth(AValue: integer);
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begin
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if FNodeWidth=AValue then Exit;
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FNodeWidth:=AValue;
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Invalidate;
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InvalidateAutoLayout;
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end;
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procedure TCustomLvlGraphControl.SetNodeUnderMouse(AValue: TLvlGraphNode);
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@ -806,6 +854,39 @@ begin
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end;
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end;
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procedure TCustomLvlGraphControl.DrawCaptions(const TxtH: integer);
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var
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Node: TLvlGraphNode;
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j: Integer;
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Level: TLvlGraphLevel;
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i: Integer;
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TxtW: Integer;
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p: TPoint;
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begin
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Canvas.Brush.Style:=bsClear;
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Canvas.Font.Height:=round(single(TxtH)*NodeCaptionScale+0.5);
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for i:=0 to Graph.LevelCount-1 do begin
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Level:=Graph.Levels[i];
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for j:=0 to Level.Count-1 do begin
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Node:=Level.Nodes[j];
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if Node.Caption='' then continue;
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TxtW:=Canvas.TextWidth(Node.Caption);
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case NodeCaptionPosition of
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lgncLeft,lgncRight: p.y:=Node.DrawCenter-(TxtH div 2);
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lgncTop: p.y:=Node.DrawPosition-NodeGap.Top-TxtH;
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lgncBottom: p.y:=Node.DrawPositionEnd+NodeGap.Bottom;
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end;
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case NodeCaptionPosition of
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lgncLeft: p.x:=Level.DrawPosition-NodeGap.Left-TxtW;
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lgncRight: p.x:=Level.DrawPosition+NodeWidth+NodeGap.Right;
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lgncTop,lgncBottom: p.x:=Level.DrawPosition+((NodeWidth-TxtW) div 2);
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end;
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//debugln(['TCustomLvlGraphControl.Paint ',Node.Caption,' DrawPosition=',Node.DrawPosition,' DrawSize=',Node.DrawSize,' TxtH=',TxtH,' TxtW=',TxtW,' p=',dbgs(p)]);
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Canvas.TextOut(p.x,p.y,Node.Caption);
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end;
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end;
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end;
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procedure TCustomLvlGraphControl.DrawNodes;
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var
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i: Integer;
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@ -827,10 +908,66 @@ begin
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end;
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end;
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procedure TCustomLvlGraphControl.SetNodeCaptionPosition(
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AValue: TLvlGraphNodeCaptionPosition);
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begin
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if FNodeCaptionPosition=AValue then Exit;
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FNodeCaptionPosition:=AValue;
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InvalidateAutoLayout;
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end;
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procedure TCustomLvlGraphControl.SetNodeCaptionScale(AValue: single);
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begin
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if FNodeCaptionScale=AValue then Exit;
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FNodeCaptionScale:=AValue;
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InvalidateAutoLayout;
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end;
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procedure TCustomLvlGraphControl.SetOptions(AValue: TLvlGraphCtrlOptions);
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begin
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if FOptions=AValue then Exit;
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FOptions:=AValue;
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InvalidateAutoLayout;
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end;
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procedure TCustomLvlGraphControl.AutoLayoutLevels(TxtH: LongInt);
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var
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j: Integer;
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p: Integer;
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i: Integer;
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LevelTxtWidths: array of integer;
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Level: TLvlGraphLevel;
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begin
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Canvas.Font.Height:=round(single(TxtH)*NodeCaptionScale+0.5);
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if Graph.LevelCount=0 then exit;
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SetLength(LevelTxtWidths,Graph.LevelCount);
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for i:=0 to Graph.LevelCount-1 do begin
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// compute needed width of the level
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LevelTxtWidths[i]:=Max(NodeWidth,Canvas.TextWidth('NodeX'));
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Level:=Graph.Levels[i];
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for j:=0 to Level.Count-1 do
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LevelTxtWidths[i]:=Max(LevelTxtWidths[i], Canvas.TextWidth(Level[j].Caption));
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if i=0 then begin
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// first level
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case NodeCaptionPosition of
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lgncLeft: p:=NodeGap.Right+LevelTxtWidths[0]+NodeGap.Left;
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lgncRight: p:=NodeGap.Left;
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lgncTop,lgncBottom: p:=NodeGap.Left+((LevelTxtWidths[0]-NodeWidth) div 2);
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end;
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end else begin
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// following level
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p:=Graph.Levels[i-1].DrawPosition;
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case NodeCaptionPosition of
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lgncLeft: p+=NodeWidth+NodeGap.Right+LevelTxtWidths[i]+NodeGap.Left;
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lgncRight: p+=NodeWidth+NodeGap.Right+LevelTxtWidths[i-1]+NodeGap.Left;
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lgncTop,lgncBottom:
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p+=((LevelTxtWidths[i-1]+LevelTxtWidths[i]) div 2)+NodeGap.Right+NodeGap.Left;
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end;
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end;
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Graph.Levels[i].DrawPosition:=p;
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end;
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SetLength(LevelTxtWidths,0);
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end;
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procedure TCustomLvlGraphControl.DoSetBounds(ALeft, ATop, AWidth,
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@ -843,10 +980,6 @@ procedure TCustomLvlGraphControl.Paint;
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var
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w: Integer;
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TxtH: integer;
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i: Integer;
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Level: TLvlGraphLevel;
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j: Integer;
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Node: TLvlGraphNode;
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begin
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inherited Paint;
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@ -875,23 +1008,11 @@ begin
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Canvas.TextOut((ClientWidth-w) div 2,round(0.25*TxtH),Caption);
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end;
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// draw edges and nodes
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// draw
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DrawEdges(false); // draw normal edges
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DrawEdges(true); // draw highlighted edges
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DrawNodes;
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// draw captions
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Canvas.Brush.Style:=bsClear;
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Canvas.Font.Height:=round(single(TxtH)*NodeCaptionScale+0.5);
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for i:=0 to Graph.LevelCount-1 do begin
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Level:=Graph.Levels[i];
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for j:=0 to Level.Count-1 do begin
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Node:=Level.Nodes[j];
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//debugln(['TCustomLvlGraphControl.Paint ',Node.Caption,' DrawPosition=',Node.DrawPosition,' DrawSize=',Node.DrawSize,' TxtH=',TxtH]);
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Canvas.TextOut(Level.DrawPosition+NodeWidth+2,
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Node.DrawCenter-(TxtH div 2),Node.Caption);
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end;
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end;
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DrawCaptions(TxtH);
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end;
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procedure TCustomLvlGraphControl.MouseMove(Shift: TShiftState; X, Y: Integer);
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@ -909,6 +1030,8 @@ begin
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FGraph.OnStructureChanged:=@GraphStructureChanged;
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FNodeWidth:=DefaultLvlGraphNodeWith;
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FNodeCaptionScale:=DefaultLvlGraphNodeCaptionScale;
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FNodeGap:=DefaultLvlGraphNodeGap;
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FNodeCaptionPosition:=DefaultLvlGraphNodeCaptionPosition;
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end;
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destructor TCustomLvlGraphControl.Destroy;
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@ -922,20 +1045,16 @@ begin
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// Paint paints all, no need to erase background
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end;
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procedure TCustomLvlGraphControl.AutoLayout(RndColors: boolean; NodeGap: integer
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);
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procedure TCustomLvlGraphControl.AutoLayout(RndColors: boolean);
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{ Min/MaxPixelPerWeight: used to scale Node.DrawSize depending on weight of
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incoming and outgoing edges
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NodeGap: space between nodes
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}
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var
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i: Integer;
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HeaderHeight: integer;
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Palette: TCodyCtrlPalette;
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TxtH: LongInt;
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p: Integer;
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Level: TLvlGraphLevel;
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j: Integer;
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Gap: TRect;
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begin
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debugln(['TCustomLvlGraphControl.AutoLayout ',DbgSName(Self),' ClientRect=',dbgs(ClientRect)]);
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Exclude(FFlags,lgcNeedAutoLayout);
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@ -956,31 +1075,25 @@ begin
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Graph.CreateTopologicalLevels;
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// Level DrawPosition
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Canvas.Font.Height:=round(single(TxtH)*NodeCaptionScale+0.5);
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for i:=0 to Graph.LevelCount-1 do begin
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if i=0 then
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p:=NodeGap
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else begin
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p:=Canvas.TextWidth('NodeX');
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Level:=Graph.Levels[i-1];
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for j:=0 to Level.Count-1 do
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p:=Max(p,Canvas.TextWidth(Level[j].Caption));
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p:=Graph.Levels[i-1].DrawPosition+NodeWidth+NodeGap+p+NodeGap+NodeWidth;
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end;
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Graph.Levels[i].DrawPosition:=p;
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AutoLayoutLevels(TxtH);
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Gap:=NodeGap;
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case NodeCaptionPosition of
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lgncTop: Gap.Top+=TxtH;
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lgncBottom: Gap.Bottom+=TxtH;
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end;
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// scale Nodes.DrawSize
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// Preferably the smallest node should be the size of the text
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// Preferably the largest level should fit without needing a scrollbar
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Graph.ScaleNodeDrawSizes(NodeGap,Screen.Height*2,1,
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Graph.ScaleNodeDrawSizes(Gap.Top,Gap.Bottom,Screen.Height*2,1,
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ClientHeight-HeaderHeight,round(single(TxtH)*NodeCaptionScale+0.5));
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// sort nodes within levels to avoid crossings
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Graph.MinimizeCrossings;
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// position nodes without overlapping
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Graph.MinimizeOverlappings(HeaderHeight,NodeGap);
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Graph.MinimizeOverlappings(HeaderHeight,Gap.Top,Gap.Bottom);
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if RndColors then begin
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Palette:=GetCCPaletteRGB(Graph.NodeCount,true);
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@ -998,6 +1111,13 @@ begin
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inherited Invalidate;
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end;
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procedure TCustomLvlGraphControl.InvalidateAutoLayout;
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begin
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if lgoAutoLayout in Options then
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Include(FFlags,lgcNeedAutoLayout);
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Invalidate;
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end;
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procedure TCustomLvlGraphControl.BeginUpdate;
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begin
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inc(fUpdateLock);
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@ -1339,8 +1459,8 @@ begin
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{$ENDIF}
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end;
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procedure TLvlGraph.ScaleNodeDrawSizes(NodeGap, HardMaxTotal, HardMinOneNode,
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SoftMaxTotal, SoftMinOneNode: integer);
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procedure TLvlGraph.ScaleNodeDrawSizes(NodeGapAbove, NodeGapBelow,
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HardMaxTotal, HardMinOneNode, SoftMaxTotal, SoftMinOneNode: integer);
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{ NodeGap: minimum space between nodes
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HardMaxTotal: maximum size of largest level
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HardMinOneNode: minimum size of a node
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@ -1362,9 +1482,11 @@ var
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DrawHeight: integer;
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PixelPerWeight, MaxPixelPerWeight, PrefMaxPixelPerWeight: single;
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begin
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debugln(['TLvlGraph.ScaleNodeDrawSizes NodeGap=',NodeGap,
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' HardMaxTotal=',HardMaxTotal,' HardMinOneNode=',HardMinOneNode,
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' SoftMaxTotal=',SoftMaxTotal,' SoftMinOneNode=',SoftMinOneNode]);
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//debugln(['TLvlGraph.ScaleNodeDrawSizes',
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// ' NodeGapAbove=',NodeGapAbove,' NodeGapBelow=',NodeGapBelow,
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// ' HardMaxTotal=',HardMaxTotal,' HardMinOneNode=',HardMinOneNode,
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// ' SoftMaxTotal=',SoftMaxTotal,' SoftMinOneNode=',SoftMinOneNode]);
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// sanitize input
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HardMinOneNode:=Max(0,HardMinOneNode);
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SoftMinOneNode:=Max(SoftMinOneNode,HardMinOneNode);
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@ -1389,9 +1511,9 @@ begin
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MinPixelPerWeight:=single(HardMinOneNode);
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PrefMinPixelPerWeight:=single(SoftMinOneNode);
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end;
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debugln(['TLvlGraph.ScaleNodeDrawSizes SmallestWeight=',SmallestWeight,
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' MinPixelPerWeight=',MinPixelPerWeight,
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' PrefMinPixelPerWeight=',PrefMinPixelPerWeight]);
|
||||
//debugln(['TLvlGraph.ScaleNodeDrawSizes SmallestWeight=',SmallestWeight,
|
||||
// ' MinPixelPerWeight=',MinPixelPerWeight,
|
||||
// ' PrefMinPixelPerWeight=',PrefMinPixelPerWeight]);
|
||||
|
||||
MaxPixelPerWeight:=0.0;
|
||||
PrefMaxPixelPerWeight:=0.0;
|
||||
@ -1401,16 +1523,16 @@ begin
|
||||
LvlWeight:=Level.GetTotalInOutWeights;
|
||||
if LvlWeight=0.0 then continue;
|
||||
// DrawHeight - how much pixel left to draw the weight
|
||||
DrawHeight:=Max(1,HardMaxTotal-(Level.Count-1)*NodeGap);
|
||||
DrawHeight:=Max(1,HardMaxTotal-(Level.Count*(NodeGapAbove+NodeGapBelow)));
|
||||
PixelPerWeight:=single(DrawHeight)/LvlWeight;
|
||||
if (MaxPixelPerWeight=0.0) or (MaxPixelPerWeight>PixelPerWeight) then
|
||||
MaxPixelPerWeight:=PixelPerWeight;
|
||||
DrawHeight:=Max(1,SoftMaxTotal-(Level.Count-1)*NodeGap);
|
||||
DrawHeight:=Max(1,SoftMaxTotal-(Level.Count*(NodeGapAbove+NodeGapBelow)));
|
||||
PixelPerWeight:=single(DrawHeight)/LvlWeight;
|
||||
if (PrefMaxPixelPerWeight=0.0) or (PrefMaxPixelPerWeight>PixelPerWeight) then
|
||||
PrefMaxPixelPerWeight:=PixelPerWeight;
|
||||
end;
|
||||
debugln(['TLvlGraph.ScaleNodeDrawSizes MaxPixelPerWeight=',MaxPixelPerWeight,' PrefMaxPixelPerWeight=',PrefMaxPixelPerWeight]);
|
||||
//debugln(['TLvlGraph.ScaleNodeDrawSizes MaxPixelPerWeight=',MaxPixelPerWeight,' PrefMaxPixelPerWeight=',PrefMaxPixelPerWeight]);
|
||||
|
||||
PixelPerWeight:=PrefMinPixelPerWeight;
|
||||
if PrefMaxPixelPerWeight>0.0 then
|
||||
@ -1419,7 +1541,7 @@ begin
|
||||
if MaxPixelPerWeight>0.0 then
|
||||
PixelPerWeight:=Min(PixelPerWeight,MaxPixelPerWeight);
|
||||
|
||||
debugln(['TLvlGraph.ScaleNodeDrawSizes PixelPerWeight=',PixelPerWeight]);
|
||||
//debugln(['TLvlGraph.ScaleNodeDrawSizes PixelPerWeight=',PixelPerWeight]);
|
||||
SetAllNodeDrawSizes(PixelPerWeight,SmallestWeight);
|
||||
end;
|
||||
|
||||
@ -1460,8 +1582,8 @@ begin
|
||||
end;
|
||||
end;
|
||||
|
||||
procedure TLvlGraph.MinimizeOverlappings(MinPos: integer; Gap: integer;
|
||||
aLevel: integer);
|
||||
procedure TLvlGraph.MinimizeOverlappings(MinPos: integer;
|
||||
NodeGapAbove: integer; NodeGapBelow: integer; aLevel: integer);
|
||||
var
|
||||
i: Integer;
|
||||
Tree: TAvgLvlTree;
|
||||
@ -1472,7 +1594,7 @@ var
|
||||
begin
|
||||
if aLevel<0 then begin
|
||||
for i:=0 to LevelCount-1 do
|
||||
MinimizeOverlappings(MinPos,Gap,i);
|
||||
MinimizeOverlappings(MinPos,NodeGapAbove,NodeGapBelow,i);
|
||||
end else begin
|
||||
Level:=Levels[aLevel];
|
||||
Tree:=TAvgLvlTree.Create(@CompareLGNodesByCenterPos);
|
||||
@ -1484,9 +1606,9 @@ begin
|
||||
while AVLNode<>nil do begin
|
||||
Node:=TLvlGraphNode(AVLNode.Data);
|
||||
if Last=nil then
|
||||
Node.DrawPosition:=MinPos
|
||||
Node.DrawPosition:=MinPos+NodeGapAbove
|
||||
else
|
||||
Node.DrawPosition:=Max(Node.DrawPosition,Last.DrawPositionEnd+Gap);
|
||||
Node.DrawPosition:=Max(Node.DrawPosition,Last.DrawPositionEnd+NodeGapBelow+NodeGapAbove);
|
||||
Last:=Node;
|
||||
AVLNode:=Tree.FindSuccessor(AVLNode);
|
||||
end;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user