mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-08-12 11:16:09 +02:00
lcl: cleanup and format the splitter code
git-svn-id: trunk@26435 -
This commit is contained in:
paul
parent
946f34ba8f
commit
f4a3839b99
@ -471,10 +471,8 @@ type
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FSplitterStartMouseXY: TPoint; // in screen coordinates
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FSplitterStartLeftTop: TPoint; // in screen coordinates
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function GetResizeControl: TControl;
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procedure SetAutoSnap(const AValue: boolean);
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procedure SetBeveled(const AValue: boolean);
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procedure SetMinSize(const AValue: integer);
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procedure SetResizeStyle(const AValue: TResizeStyle);
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protected
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class procedure WSRegisterClass; override;
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procedure CheckAlignment;
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@ -504,14 +502,14 @@ type
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function GetSplitterPosition: integer;
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public
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property Align default alLeft;
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property AutoSnap: boolean read FAutoSnap write SetAutoSnap default true;
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property AutoSnap: boolean read FAutoSnap write FAutoSnap default true;
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property Beveled: boolean read FBeveled write SetBeveled default false;
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property Cursor default crHSplit;
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property MinSize: integer read FMinSize write SetMinSize default 30;
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property OnCanResize: TCanResizeEvent read FOnCanResize write FOnCanResize;
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property OnMoved: TNotifyEvent read FOnMoved write FOnMoved;
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property ResizeAnchor: TAnchorKind read FResizeAnchor write SetResizeAnchor default akLeft;
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property ResizeStyle: TResizeStyle read FResizeStyle write SetResizeStyle default rsUpdate;
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property ResizeStyle: TResizeStyle read FResizeStyle write FResizeStyle default rsUpdate;
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end;
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@ -28,7 +28,8 @@ var
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begin
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Result := nil;
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count := Control.Parent.ControlCount;
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if count > 0 then begin
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if count > 0 then
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begin
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fRect := Control.BoundsRect;
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case Control.Align of
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alTop: begin
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@ -55,13 +56,13 @@ begin
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end;
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end; // case
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Dec(count);
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for i := 0 to count do begin
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for i := 0 to count do
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begin
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CurControl := Control.Parent.Controls[i];
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if (CurControl <> Control)
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and CurControl.Visible
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and (CurControl.Align in alignList)
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and (PtInRect(CurControl.BoundsRect, fPoint))
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then Result := CurControl;
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if (CurControl <> Control) and
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CurControl.Visible and
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(CurControl.Align in alignList) and
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(PtInRect(CurControl.BoundsRect, fPoint)) then Result := CurControl;
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if Assigned(Result) then Break;
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end; // for i
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end;
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@ -74,21 +75,17 @@ function FindVirtualOppositeControl(Control: TControl): TControl;
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Result := False;
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case Control.Align of
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alTop:
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if (CurControl.Align = Control.Align)
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and (CurControl.Top >= Control.BoundsRect.Bottom)
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then Result := True;
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if (CurControl.Align = Control.Align) and
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(CurControl.Top >= Control.BoundsRect.Bottom) then Result := True;
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alBottom:
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if (CurControl.Align = Control.Align)
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and (CurControl.BoundsRect.Bottom <= Control.Top)
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then Result := True;
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if (CurControl.Align = Control.Align) and
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(CurControl.BoundsRect.Bottom <= Control.Top) then Result := True;
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alLeft:
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if (CurControl.Align = Control.Align)
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and (CurControl.Left >= Control.BoundsRect.Right)
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then Result := True;
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if (CurControl.Align = Control.Align) and
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(CurControl.Left >= Control.BoundsRect.Right) then Result := True;
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alRight:
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if (CurControl.Align = Control.Align)
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and (CurControl.BoundsRect.Right <= Control.Left)
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then Result := True;
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if (CurControl.Align = Control.Align) and
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(CurControl.BoundsRect.Right <= Control.Left) then Result := True;
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end;
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end;
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@ -109,14 +106,17 @@ var
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begin
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Result := nil;
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count := Control.Parent.ControlCount;
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if count > 0 then begin
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if count > 0 then
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begin
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Dec(count);
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for i := 0 to count do begin
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for i := 0 to count do
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begin
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CurControl := Control.Parent.Controls[i];
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if (CurControl <> Control) then begin
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if ((Result = nil) and OppositeControl(CurControl, Control))
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or (Assigned(Result) and CompPos(CurControl, Result))
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then Result := CurControl;
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if (CurControl <> Control) then
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begin
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if ((Result = nil) and OppositeControl(CurControl, Control)) or
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(Assigned(Result) and CompPos(CurControl, Result)) then
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Result := CurControl;
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end;
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end; // for i
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end;
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@ -124,24 +124,12 @@ end;
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{ TCustomSplitter }
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procedure TCustomSplitter.SetResizeStyle(const AValue: TResizeStyle);
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begin
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if FResizeStyle=AValue then exit;
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FResizeStyle:=AValue;
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end;
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class procedure TCustomSplitter.WSRegisterClass;
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begin
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inherited WSRegisterClass;
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RegisterCustomSplitter;
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end;
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procedure TCustomSplitter.SetAutoSnap(const AValue: boolean);
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begin
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if FAutoSnap=AValue then exit;
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FAutoSnap:=AValue;
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end;
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function TCustomSplitter.GetResizeControl: TControl;
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begin
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if Align in [alLeft,alRight,alTop,alBottom] then
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@ -189,8 +177,8 @@ var
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function GetControlSize(Control: TControl): Integer;
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begin
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Result := 0;
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if Assigned(Control)
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then case ResizeAnchor of
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if Assigned(Control) then
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case ResizeAnchor of
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akLeft, akRight: Result := Control.Width;
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akTop, akBottom: Result := Control.Height;
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end;
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@ -246,8 +234,8 @@ var
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if NewSize > EndSize then NewSize := EndSize;
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if NewSize < StartSize then NewSize := StartSize;
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if fAutoSnap and (NewSize < fMinSize)
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then NewSize := StartSize;
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if AutoSnap and (NewSize < fMinSize) then
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NewSize := StartSize;
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Result := NewSize;
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end;
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@ -267,12 +255,13 @@ var
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count: Integer;
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begin
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Result := nil;
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for count := Parent.ControlCount-1 downto 0 do begin
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for count := Parent.ControlCount - 1 downto 0 do
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begin
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CurControl := Parent.Controls[count];
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if (CurControl <> Self)
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and ((CurControl.Align = alClient)
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or ((Self.Align in [alTop,alBottom])
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and (CurControl.Align in [alLeft,alRight]))) then begin
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if (CurControl <> Self) and
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((CurControl.Align = alClient) or ((Self.Align in [alTop,alBottom]) and
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(CurControl.Align in [alLeft,alRight]))) then
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begin
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Result := CurControl;
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Break;
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end;
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@ -284,7 +273,8 @@ var
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CurControl: TControl;
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begin
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CurControl := Control;
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while Assigned(CurControl) do begin
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while Assigned(CurControl) do
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begin
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Control := CurControl;
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CurControl := FindOppositeControl(Control);
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end;
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@ -295,12 +285,14 @@ var
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// returns the maximum size of the CurResizeControl due to parent's client
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// area
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begin
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if ResizeAnchor in [akLeft,akRight] then begin
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if ResizeAnchor in [akLeft, akRight] then
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begin
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if ResizeAnchor = akRight then
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Result := CurResizeControl.Left + CurResizeControl.Width - Width
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else
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Result := Parent.ClientWidth - CurResizeControl.Left - Width;
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end else begin
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end else
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begin
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if ResizeAnchor = akBottom then
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Result := CurResizeControl.Top + CurResizeControl.Height - Height
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else
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@ -329,7 +321,8 @@ begin
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//DebugLn('TCustomSplitter.MoveSplitter ',DbgSName(Self),' Offset=',dbgs(Offset));
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if Offset = 0 then Exit;
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if Align in [alLeft,alTop,alRight,alBottom] then begin
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if Align in [alLeft, alTop, alRight, alBottom] then
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begin
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// aligned Splitter
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// -> consider aligned siblings for minimum and maximum movement
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@ -340,42 +333,40 @@ begin
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// calculate minimum size
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StartSize := 1;
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if not fAutoSnap
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then Inc(StartSize,
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Max(fMinSize, GetControlConstraintsMinSize(CurResizeControl)));
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if not AutoSnap then
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Inc(StartSize, Max(FMinSize, GetControlConstraintsMinSize(CurResizeControl)));
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if StartSize > 1 then Dec(StartSize);
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// calculate maximum size
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if Assigned(CurOtherResizeControl)
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then EndSize := GetControlSize(CurResizeControl)
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+ GetControlSize(CurOtherResizeControl)
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- Max(fMinSize, GetControlConstraintsMinSize(CurOtherResizeControl))
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else begin
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if Assigned(CurOtherResizeControl) then
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EndSize := GetControlSize(CurResizeControl) +
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GetControlSize(CurOtherResizeControl) -
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Max(fMinSize, GetControlConstraintsMinSize(CurOtherResizeControl))
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else
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begin
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VirtualOppositeControl := FindVirtualOppositeControl(Self);
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LastControl := FindLastControl(Self);
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case ResizeAnchor of
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akLeft, akTop: begin
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if Assigned(VirtualOppositeControl) then
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akLeft, akTop:
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begin
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EndSize := GetControlSize(CurResizeControl)
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+ (GetControlMinPos(VirtualOppositeControl)
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- (GetControlMinPos(LastControl)
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+ GetControlSize(LastControl)));
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end
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else EndSize := GetControlSize(CurResizeControl)
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+ (GetParentClientSize
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- GetControlMinPos(LastControl)
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- GetControlSize(LastControl))
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if Assigned(VirtualOppositeControl) then
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EndSize := GetControlSize(CurResizeControl) +
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(GetControlMinPos(VirtualOppositeControl) -
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(GetControlMinPos(LastControl) + GetControlSize(LastControl)))
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else
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EndSize := GetControlSize(CurResizeControl) +
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(GetParentClientSize -
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GetControlMinPos(LastControl) - GetControlSize(LastControl))
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end;
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akRight, akBottom: begin
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akRight, akBottom:
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begin
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if Assigned(VirtualOppositeControl) then
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EndSize := GetControlSize(CurResizeControl)
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+ (GetControlMinPos(LastControl)
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- (GetControlMinPos(VirtualOppositeControl)
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+ GetControlSize(VirtualOppositeControl)))
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else EndSize := GetControlSize(CurResizeControl)
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+ GetControlMinPos(LastControl);
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EndSize := GetControlSize(CurResizeControl) +
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(GetControlMinPos(LastControl) -
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(GetControlMinPos(VirtualOppositeControl) + GetControlSize(VirtualOppositeControl)))
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else
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EndSize := GetControlSize(CurResizeControl) + GetControlMinPos(LastControl);
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end;
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end;
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end;
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@ -384,37 +375,37 @@ begin
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NewSize := CalcNewSize(StartSize, EndSize, Offset);
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// OnCanResize event
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if CheckNewSize(NewSize)
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then SetAlignControlSize(NewSize);
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if CheckNewSize(NewSize) then
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SetAlignControlSize(NewSize);
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end else begin
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end else
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begin
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// anchored Splitter
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// -> consider anchored siblings for minimum and maximum movement
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// OffsetMaxLower = maximum the Splitter can be moved top/left
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OffsetMaxLower := Max(0,GetControlMinPos(Self)-fMinSize);
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OffsetMaxLower := Max(0, GetControlMinPos(Self) - FMinSize);
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// OffsetMaxUpper = maximum the Splitter can be moved bottom/right
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OffsetMaxUpper := Max(0,GetParentsClientSize
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-GetControlSize(Self)-GetControlMinPos(Self));
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OffsetMaxUpper := Max(0, GetParentsClientSize -GetControlSize(Self) - GetControlMinPos(Self));
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//DebugLn(['TCustomSplitter.MoveSplitter OffsetMaxLower=',OffsetMaxLower,' OffsetMaxUpper=',OffsetMaxUpper]);
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for i:=0 to AnchoredControlCount-1 do begin
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for i := 0 to AnchoredControlCount - 1 do
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begin
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CurResizeControl := AnchoredControls[i];
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//debugln('TCustomSplitter.MoveSplitter ',DbgSName(Self),' CurResizeControl=',DbgSName(CurResizeControl));
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if (CurResizeControl.AnchorSide[ResizeAnchor].Control=Self)
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or (CurResizeControl.AnchorSide[OppositeAnchor[ResizeAnchor]].Control=Self)
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then begin
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if (CurResizeControl.AnchorSide[ResizeAnchor].Control = Self) or
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(CurResizeControl.AnchorSide[OppositeAnchor[ResizeAnchor]].Control = Self) then
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begin
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// this control uses this Splitter as anchor
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// => moving the Splitter will resize CurResizeControl
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// => consider the constraints of CurResizeControl
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// for minimum and maximum movement
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// calculate how much the CurResizeControl can be shrinked
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CurMaxShrink:=Max(0,GetControlSize(CurResizeControl)-
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GetControlConstraintsMinSize(CurResizeControl));
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CurMaxShrink := Max(0, GetControlSize(CurResizeControl) - GetControlConstraintsMinSize(CurResizeControl));
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// calculate how much the CurResizeControl can be enlarged
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CurMaxEnlarge:=Max(0,GetControlConstraintsMaxSize(CurResizeControl)
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-GetControlSize(CurResizeControl));
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if CurMaxEnlarge=0 then begin
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CurMaxEnlarge := Max(0, GetControlConstraintsMaxSize(CurResizeControl) - GetControlSize(CurResizeControl));
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if CurMaxEnlarge=0 then
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begin
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CurMaxEnlarge := GetParentsClientSize;
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if GetControlMinPos(CurResizeControl) < 0 then
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dec(CurMaxEnlarge, GetControlMinPos(CurResizeControl));
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@ -422,13 +413,15 @@ begin
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//debugln('TCustomSplitter.MoveSplitter ',DbgSName(Self),' CurResizeControl=',DbgSName(CurResizeControl),' CurMaxShrink=',dbgs(CurMaxShrink),' CurMaxEnlarge=',dbgs(CurMaxEnlarge),' ConstraintsMax=',dbgs(GetControlConstraintsMaxSize(CurResizeControl)));
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// apply to the offset boundaries
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if (CurResizeControl.AnchorSide[akLeft].Control=Self)
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or (CurResizeControl.AnchorSide[akTop].Control=Self) then begin
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if (CurResizeControl.AnchorSide[akLeft].Control = Self) or
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(CurResizeControl.AnchorSide[akTop].Control = Self) then
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begin
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if CurMaxShrink > 0 then
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OffsetMaxLower := Min(OffsetMaxLower, CurMaxShrink);
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if CurMaxEnlarge > 0 then
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OffsetMaxUpper := Min(OffsetMaxUpper, CurMaxEnlarge);
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end else begin
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end else
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begin
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if CurMaxEnlarge > 0 then
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OffsetMaxLower := Min(OffsetMaxLower, CurMaxEnlarge);
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if CurMaxShrink > 0 then
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@ -465,20 +458,20 @@ end;
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procedure TCustomSplitter.SetBeveled(const AValue: boolean);
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begin
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if FBeveled=AValue then exit;
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if FBeveled = AValue then Exit;
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FBeveled := AValue;
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Invalidate;
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end;
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procedure TCustomSplitter.SetMinSize(const AValue: integer);
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begin
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if (FMinSize=AValue) or (AValue<1) then exit;
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if (FMinSize=AValue) or (AValue < 1) then Exit;
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FMinSize := AValue;
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end;
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procedure TCustomSplitter.SetResizeAnchor(const AValue: TAnchorKind);
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begin
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if FResizeAnchor=AValue then exit;
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if FResizeAnchor = AValue then Exit;
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FResizeAnchor := AValue;
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if ResizeAnchor in [akLeft, akRight] then
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Cursor := crHSplit
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@ -490,8 +483,10 @@ end;
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procedure TCustomSplitter.SetResizeControl(const AValue: TControl);
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begin
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if Align in [alLeft,alRight,alTop,alBottom] then begin
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if AValue<>nil then begin
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if Align in [alLeft, alRight, alTop, alBottom] then
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begin
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if AValue <> nil then
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begin
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case Align of
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alLeft: Left := AValue.Left + 1;
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alTop: Top := AValue.Top + 1;
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@ -499,14 +494,14 @@ begin
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alBottom: Top := AValue.Top - 1;
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end;
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end;
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end else begin
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end
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else
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AnchorSide[ResizeAnchor].Control := AValue;
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end;
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end;
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procedure TCustomSplitter.StartSplitterMove(const MouseXY: TPoint);
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begin
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if FSplitDragging then exit;
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if FSplitDragging then Exit;
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FSplitDragging := True;
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FSplitterStartMouseXY := MouseXY;
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FSplitterStartLeftTop := Point(Left, Top);
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@ -537,11 +532,9 @@ begin
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GetCursorPos(MousePos);
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case ResizeAnchor of
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akLeft, akRight:
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Offset := (MousePos.X - FSplitterStartMouseXY.X)
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- (Self.Left - FSplitterStartLeftTop.X);
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Offset := (MousePos.X - FSplitterStartMouseXY.X) - (Self.Left - FSplitterStartLeftTop.X);
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akTop, akBottom:
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Offset := (MousePos.Y - FSplitterStartMouseXY.Y)
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- (Self.Top - FSplitterStartLeftTop.Y);
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Offset := (MousePos.Y - FSplitterStartMouseXY.Y) - (Self.Top - FSplitterStartLeftTop.Y);
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end;
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if Offset = 0 then Exit;
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@ -571,8 +564,8 @@ var
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procedure FindNearerControl(CurValue, Limit: integer);
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begin
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if (CurValue<=Limit)
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and ((Result=nil) or (BestValue<CurValue)) then begin
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if (CurValue <= Limit) and ((Result = nil) or (BestValue < CurValue)) then
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begin
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BestValue := CurValue;
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Result := CurControl;
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end;
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@ -583,12 +576,12 @@ begin
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BestValue:=0;
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if (Parent = nil) then Exit;
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if not (Align in [alLeft,alTop,alRight,alBottom]) then exit;
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for i := Parent.ControlCount-1 downto 0 do begin
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for i := Parent.ControlCount - 1 downto 0 do
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begin
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CurControl := Parent.Controls[i];
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if (CurControl <> Self)
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and (CurControl.Visible)
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and ((CurControl.Align = Self.Align) or (CurControl.Align=alClient))
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then begin
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if (CurControl <> Self) and (CurControl.Visible) and
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((CurControl.Align = Self.Align) or (CurControl.Align=alClient)) then
|
||||
begin
|
||||
case Self.Align of
|
||||
alLeft: FindNearerControl(CurControl.Left+CurControl.Width,Left);
|
||||
alTop: FindNearerControl(CurControl.Top+CurControl.Height,Top);
|
||||
@ -683,8 +676,7 @@ begin
|
||||
alRight: FResizeAnchor:=akRight;
|
||||
alBottom: FResizeAnchor:=akBottom;
|
||||
end;
|
||||
if ((Align = Value) and (OldResizeAnchor=FResizeAnchor))
|
||||
or (Value=alClient) then
|
||||
if ((Align = Value) and (OldResizeAnchor = FResizeAnchor)) or (Value = alClient) then
|
||||
Exit;
|
||||
OldWidth := Width;
|
||||
OldHeight := Height;
|
||||
@ -701,12 +693,15 @@ begin
|
||||
CheckAlignment;
|
||||
|
||||
// lfm contains correct size already
|
||||
if not (csLoading in ComponentState) then begin
|
||||
if (OldResizeAnchor in [akLeft,akRight])=(ResizeAnchor in [akLeft,akRight])
|
||||
then begin
|
||||
if not (csLoading in ComponentState) then
|
||||
begin
|
||||
if (OldResizeAnchor in [akLeft,akRight])=(ResizeAnchor in [akLeft,akRight]) then
|
||||
begin
|
||||
// keep width and height
|
||||
SetBounds(Left,Top,OldWidth,OldHeight);
|
||||
end else begin
|
||||
end
|
||||
else
|
||||
begin
|
||||
// resize
|
||||
if Align in [alLeft,alRight] then
|
||||
Width:=OldHeight
|
||||
@ -854,8 +849,7 @@ begin
|
||||
Width := 5;
|
||||
end;
|
||||
|
||||
procedure TCustomSplitter.AnchorSplitter(Kind: TAnchorKind; AControl: TControl
|
||||
);
|
||||
procedure TCustomSplitter.AnchorSplitter(Kind: TAnchorKind; AControl: TControl);
|
||||
|
||||
procedure AnchorSplitterSides(
|
||||
ResizeSide,// the side of the Splitter, where AControl is touched and moved
|
||||
@ -894,8 +888,8 @@ begin
|
||||
akBottom: AnchorSplitterSides(akBottom, akTop, akLeft, akRight);
|
||||
end;
|
||||
|
||||
if (OldResizeAnchor in [akLeft,akRight])=(ResizeAnchor in [akLeft,akRight])
|
||||
then begin
|
||||
if (OldResizeAnchor in [akLeft, akRight]) = (ResizeAnchor in [akLeft, akRight]) then
|
||||
begin
|
||||
// keep width and height
|
||||
SetBounds(Left, Top, OldWidth, OldHeight);
|
||||
end else begin
|
||||
|
||||
Loading…
Reference in New Issue
Block a user