diff options
author | Graeme Geldenhuys <graemeg@gmail.com> | 2013-04-12 18:04:31 +0100 |
---|---|---|
committer | Graeme Geldenhuys <graemeg@gmail.com> | 2013-04-12 18:29:05 +0100 |
commit | b24d34f161a26daab6ab625535c2ea27b7c9d74e (patch) | |
tree | 1014b510b4ee3a5e9eaf06e52253ba0ca8c6937d /prototypes/mdi | |
parent | e1fe151dc97435361190f3eee698d230e4a61308 (diff) | |
download | fpGUI-b24d34f161a26daab6ab625535c2ea27b7c9d74e.tar.xz |
MDI prototype now has basic horizontal scrollbar support.
Diffstat (limited to 'prototypes/mdi')
-rw-r--r-- | prototypes/mdi/fpg_mdi.pas | 109 |
1 files changed, 104 insertions, 5 deletions
diff --git a/prototypes/mdi/fpg_mdi.pas b/prototypes/mdi/fpg_mdi.pas index 0e290800..9087213d 100644 --- a/prototypes/mdi/fpg_mdi.pas +++ b/prototypes/mdi/fpg_mdi.pas @@ -22,11 +22,17 @@ type FVerBar: TfpgScrollbar; FList: TList; FActiveWindow: TfpgMDIChildForm; + FScrollingHorizonal: Boolean; + FLastHorizonalPos: integer; procedure InternalMsgFreeMe(var msg: TfpgMessageRec); message FPGM_FREEME; procedure SetActiveWindow(AValue: TfpgMDIChildForm); function GetChildWindowCount: integer; + procedure MDIChildMoved(Sender: TObject; const rec: TfpgMoveEventRec); + function CalcVirtualWidth: integer; + procedure HorizontalScrollBarScrolled(Sender: TObject; position: integer); protected procedure HandlePaint; override; + procedure HandleResize(AWidth, AHeight: TfpgCoord); override; procedure PositionScrollBars; public constructor Create(AOwner: TComponent); override; @@ -66,6 +72,7 @@ type procedure TitleMouseExit(Sender: TObject); procedure CloseMDIWindowClicked(Sender: TObject); procedure SetActive(AValue: boolean); + procedure ChildFormResized(Sender: TObject); procedure DoOnMove(const x, y: TfpgCoord); protected procedure HandleMove(x, y: TfpgCoord); override; @@ -159,6 +166,11 @@ begin end; end; +procedure TfpgMDIChildForm.ChildFormResized(Sender: TObject); +begin + SendDebug('ChildFormResize'); +end; + procedure TfpgMDIChildForm.DoOnMove(const x, y: TfpgCoord); var rec: TfpgMoveEventRec; @@ -195,9 +207,10 @@ begin FLastPos := Point(0,0); {@VFD_BODY_BEGIN: MDIChildForm} Name := 'MDIChildForm'; - SetPosition(369, 166, 300, 250); + SetPosition(10, 10, 300, 250); WindowTitle := 'ChildForm1'; Hint := ''; + OnResize := @ChildFormResized; Panel1 := TfpgPanel.Create(self); with Panel1 do @@ -412,12 +425,91 @@ begin Result := FList.Count; end; +procedure TfpgMDIWorkArea.MDIChildMoved(Sender: TObject; const rec: TfpgMoveEventRec); +var + w: integer; +begin + if FScrollingHorizonal then + Exit; // We are using the scrollbar to slide windows in/out of view + w := CalcVirtualWidth; + if w > Width then + begin + FHorBar.Max := w - Width; + FHorBar.SliderSize := Width / w; + if not FHorBar.Visible then + begin + FHorBar.Position := 0; + FLastHorizonalPos := 0; + FHorBar.Visible := True + end + else + FHorBar.RepaintSlider; + end + else + FHorBar.Visible := False; +end; + +function TfpgMDIWorkArea.CalcVirtualWidth: integer; +var + w: integer; + i: integer; + c: TfpgMDIChildForm; +begin + w := Width; + for i := 0 to ComponentCount -1 do + begin + if Components[i] is TfpgScrollBar then + continue; + if Components[i] is TfpgMDIChildForm then + begin + c := Components[i] as TfpgMDIChildForm; + if c.Left < 0 then + w := Width + Abs(c.Left); + if c.Right > w then + w := c.Right; + end; + end; + Result := w; +end; + +procedure TfpgMDIWorkArea.HorizontalScrollBarScrolled(Sender: TObject; position: integer); +var + w: integer; + i: integer; + c: TfpgMDIChildForm; +begin + FScrollingHorizonal := True; + for i := 0 to ComponentCount -1 do + begin + if Components[i] is TfpgScrollBar then + continue; + if Components[i] is TfpgMDIChildForm then + begin + c := Components[i] as TfpgMDIChildForm; + c.Left := c.Left + (FLastHorizonalPos - position); + c.UpdateWindowPosition; + fpgApplication.ProcessMessages; + end; + end; + FLastHorizonalPos := position; + FScrollingHorizonal := False; +end; + procedure TfpgMDIWorkArea.HandlePaint; begin inherited HandlePaint; Canvas.Clear(clLtGray); end; +procedure TfpgMDIWorkArea.HandleResize(AWidth, AHeight: TfpgCoord); +var + rec: TfpgMoveEventRec; +begin + inherited HandleResize(AWidth, AHeight); + if ComponentCount > 2 then + MDIChildMoved(self, rec); +end; + procedure TfpgMDIWorkArea.PositionScrollBars; begin FHorBar.Left := Left; @@ -434,14 +526,20 @@ constructor TfpgMDIWorkArea.Create(AOwner: TComponent); begin inherited Create(AOwner); FIsContainer := True; - FHorBar := TfpgScrollbar.Create(self); + FScrollingHorizonal := False; + + FHorBar := TfpgScrollbar.Create(self); FHorBar.Visible := False; FHorBar.Orientation := orHorizontal; - FVerBar := TfpgScrollbar.Create(self); + FHorBar.OnScroll := @HorizontalScrollBarScrolled; + + FVerBar := TfpgScrollbar.Create(self); FVerBar.Visible := False; FVerBar.Orientation := orVertical; - PositionScrollBars; - FList := TList.Create; + + PositionScrollBars; + + FList := TList.Create; FActiveWindow := nil; end; @@ -458,6 +556,7 @@ begin frm := TfpgMDIChildForm.Create(self); Result := AWindowClass.Create(frm.bvlClientArea); frm.SetClientFrame(Result); + frm.OnMove := @MDIChildMoved; FList.Add(frm); ActiveWindow := frm; end; |