Added (un)grouping support.

git-svn-id: http://www.villavu.com/repositories/merlijn/mufasa@298 3f818213-9676-44b0-a9b4-5e4c4e03d09d

Projects/SAMufasaGUI/colourhistory.lfm

@@ -96,10 +96,13 @@ object ColourHistoryForm: TColourHistoryForm
     Width = 337
     Anchors = [akTop, akLeft, akRight, akBottom]
     DefaultItemHeight = 19
+    DragMode = dmAutomatic
     Images = CHImages
     ScrollBars = ssAutoBoth
     TabOrder = 5
     OnChange = ColourTreeChange
+    OnDragOver = ColourTreeDragOver
+    OnEndDrag = ColourTreeEndDrag
   end
   object CHImages: TImageList
     left = 360

Projects/SAMufasaGUI/colourhistory.lrs

@@ -28,7 +28,9 @@ LazarusResources.Add('TColourHistoryForm','FORMDATA',[
   +'hors'#11#5'akTop'#7'akRight'#0#7'Caption'#6#9'RGBValues'#20'Constraints.Min'
   +'Width'#2'p'#11'ParentColor'#8#0#0#9'TTreeView'#10'ColourTree'#4'Left'#2#8#6
   +'Height'#3#169#0#3'Top'#2#16#5'Width'#3'Q'#1#7'Anchors'#11#5'akTop'#6'akLeft'
-  +#7'akRight'#8'akBottom'#0#17'DefaultItemHeight'#2#19#6'Images'#7#8'CHImages'
-  +#10'ScrollBars'#7#10'ssAutoBoth'#8'TabOrder'#2#5#8'OnChange'#7#16'ColourTree'
-  +'Change'#0#0#10'TImageList'#8'CHImages'#4'left'#3'h'#1#3'top'#3#200#0#0#0#0
+  +#7'akRight'#8'akBottom'#0#17'DefaultItemHeight'#2#19#8'DragMode'#7#11'dmAuto'
+  +'matic'#6'Images'#7#8'CHImages'#10'ScrollBars'#7#10'ssAutoBoth'#8'TabOrder'#2
+  +#5#8'OnChange'#7#16'ColourTreeChange'#10'OnDragOver'#7#18'ColourTreeDragOver'
+  +#9'OnEndDrag'#7#17'ColourTreeEndDrag'#0#0#10'TImageList'#8'CHImages'#4'left'
+  +#3'h'#1#3'top'#3#200#0#0#0#0
 ]);

Projects/SAMufasaGUI/colourhistory.pas

@@ -34,6 +34,9 @@ type
     ColourTree: TTreeView;
     procedure ChangeName(Sender: TObject);
     procedure ColourTreeChange(Sender: TObject; Node: TTreeNode);
+    procedure ColourTreeDragOver(Sender, Source: TObject; X, Y: Integer;
+      State: TDragState; var Accept: Boolean);
+    procedure ColourTreeEndDrag(Sender, Target: TObject; X, Y: Integer);
     procedure DeleteSelected(Sender: TObject);
     procedure AddColObj(c: TColourPickerObject; autoName: Boolean);
 
@@ -163,6 +166,37 @@ begin
   end;
 end;
 
+procedure TColourHistoryForm.ColourTreeDragOver(Sender, Source: TObject; X,
+  Y: Integer; State: TDragState; var Accept: Boolean);
+
+begin
+  Accept:=True;
+end;
+
+procedure TColourHistoryForm.ColourTreeEndDrag(Sender, Target: TObject; X,
+  Y: Integer);
+
+Var
+   Node: TTreeNode;
+
+begin
+  Node := ColourTree.GetNodeAt(X, Y);
+  if not assigned(ColourTree.Selected) then
+  begin
+    writeln('No valid node is currently selected');
+    exit;
+  end;
+  if not assigned(Node) then
+  begin
+    ColourTree.Selected.MoveTo(nil, naAdd);
+    exit;
+  end;
+
+  ColourTree.Selected.MoveTo(Node, naAddChild);
+  writeln('Dragging from: ' + ColourTree.Selected.Text);
+  writeln('Dragging to: ' + Node.Text);
+end;
+
 procedure TColourHistoryForm.ChangeName(Sender: TObject);
 begin
   if not Assigned(ColourTree.Selected) then