diff options
Diffstat (limited to 'gui/fpguilistbox.inc')
| -rw-r--r-- | gui/fpguilistbox.inc | 125 |
1 files changed, 105 insertions, 20 deletions
diff --git a/gui/fpguilistbox.inc b/gui/fpguilistbox.inc index cbba2067..abea4016 100644 --- a/gui/fpguilistbox.inc +++ b/gui/fpguilistbox.inc @@ -20,6 +20,8 @@ {$IFDEF read_interface} + { TFCustomListBox } + TFCustomListBox = class(TFWidget) private FHotTrack: Boolean; @@ -36,12 +38,12 @@ procedure Paint(Canvas: TFCanvas); override; function ProcessEvent(Event: TEventObj): Boolean; override; function DistributeEvent(Event: TEventObj): Boolean; override; -// procedure EvKeyPressed(Key: Word; Shift: TShiftState); override; + procedure EvKeyPressed(Key: Word; Shift: TShiftState); override; procedure CalcSizes; override; procedure Resized; override; procedure RecalcWidth; procedure UpdateScrollBars; - procedure RedrawItem(AIndex: Integer); + function RedrawItem(AIndex: Integer): TRect; property CanExpandWidth default True; property CanExpandHeight default True; property HotTrack: Boolean read FHotTrack write FHotTrack default False; @@ -125,10 +127,8 @@ begin FCanExpandHeight := True; ScrollingSupport := TScrollingSupport.Create(Self); - ScrollingSupport.HorzScrollBar.OnScroll := - @ScrollingSupport.DefHorzScrollHandler; - ScrollingSupport.VerTFScrollBar.OnScroll := - @ScrollingSupport.DefVertScrollHandler; + ScrollingSupport.HorzScrollBar.OnScroll := @ScrollingSupport.DefHorzScrollHandler; + ScrollingSupport.VertScrollBar.OnScroll := @ScrollingSupport.DefVertScrollHandler; Items := TFListBoxStrings.Create(Self); FItemIndex := -1; UpdateScrollBars; @@ -141,9 +141,6 @@ begin inherited Destroy; end; - -// protected methods - procedure TFCustomListBox.Paint(Canvas: TFCanvas); var i, StartIndex, EndIndex: Integer; @@ -160,7 +157,7 @@ begin Canvas.FillRect(ScrollingSupport.ClientRect); Style.SetUIColor(Canvas, clWindowText); - with ScrollingSupport.VerTFScrollBar do + with ScrollingSupport.VertScrollBar do begin StartIndex := Position div ItemHeight; EndIndex := (Position + PageSize) div ItemHeight; @@ -228,11 +225,100 @@ begin inherited DistributeEvent(Event); end; +procedure TFCustomListBox.EvKeyPressed(Key: Word; Shift: TShiftState); +var + mshift: TShiftState; + HorzScrollBar: TFScrollBar; + VertScrollBar: TFScrollBar; + r: TRect; +begin +// writeln('Before FItemIndex=' + IntToStr(FItemIndex)); + HorzScrollBar := ScrollingSupport.HorzScrollBar; + VertScrollBar := ScrollingSupport.VertScrollBar; + + mshift := Shift * [ssShift, ssAlt, ssCtrl, ssMeta, ssSuper, ssHyper, ssAltGr]; + if mshift = [] then + case Key of +// keyLeft: +// HorzScrollBar.ButtonUpClick(nil); +// keyRight: +// HorzScrollBar.ButtonDownClick(nil); + keyUp: + begin +// writeln('keyup'); + if FItemIndex > 0 then + begin + RedrawItem(ItemIndex); + Dec(FItemIndex); + r := RedrawItem(ItemIndex); + // we should only call this when focus rect is out of view + if not PtInRect(ScrollingSupport.ClientRect, Point(r.Left, r.Top)) then + begin + VertScrollBar.ButtonUpClick(nil); + end; + end; + end; + keyDown: + begin +// writeln('keydown'); + if FItemIndex < (Items.Count - 1) then + begin + RedrawItem(ItemIndex); + Inc(FItemIndex); + r := RedrawItem(ItemIndex); + // we should only call this when focus rect is out of view + if not PtInRect(ScrollingSupport.ClientRect, Point(r.Left, r.Bottom)) then + begin + VertScrollBar.ButtonDownClick(nil); + end; + end; + end; + keyPageUp: + VertScrollBar.PageUp; + keyPageDown: + VertScrollBar.PageDown; + keyHome: + begin + RedrawItem(ItemIndex); + FItemIndex := 0; + RedrawItem(ItemIndex); + VertScrollBar.Position := 0; + end; + keyEnd: + begin + RedrawItem(ItemIndex); + FItemIndex := (Items.Count - 1); + RedrawItem(ItemIndex); + VertScrollBar.Position := VertScrollBar.Max - VertScrollBar.PageSize; + end; + keyReturn: + begin + if Assigned(OnClick) then + OnClick(Self); + end; + end + else if mshift = [ssShift] then + case Key of + keyPageUp: + HorzScrollBar.PageUp; + keyPageDown: + HorzScrollBar.PageDown; + keyHome: + HorzScrollBar.Position := 0; + keyEnd: + HorzScrollBar.Position := HorzScrollBar.Max - HorzScrollBar.PageSize; + end + else + inherited EvKeyPressed(Key, Shift); + +// writeln('After FItemIndex=' + IntToStr(FItemIndex)); +end; + procedure TFCustomListBox.CalcSizes; begin ScrollingSupport.CalcSizes; ItemHeight := FindForm.Wnd.Canvas.FontCellHeight; - ScrollingSupport.VerTFScrollBar.SmallChange := ItemHeight; + ScrollingSupport.VertScrollBar.SmallChange := ItemHeight; RecalcWidth; end; @@ -265,21 +351,20 @@ begin Size(FMaxItemWidth, Items.Count * ItemHeight - 1)); end; -procedure TFCustomListBox.RedrawItem(AIndex: Integer); +function TFCustomListBox.RedrawItem(AIndex: Integer): TRect; var ItemRect: TRect; begin if AIndex < 0 then - exit; //==> + Exit; //==> ItemRect := ScrollingSupport.ClientRect; - Inc(ItemRect.Top, AIndex * ItemHeight - - ScrollingSupport.VerTFScrollBar.Position); + Inc(ItemRect.Top, AIndex * ItemHeight - ScrollingSupport.VertScrollBar.Position); if (ItemRect.Top > ScrollingSupport.ClientRect.Bottom) or (ItemRect.Top + ItemHeight <= ScrollingSupport.ClientRect.Top) then - exit; - ItemRect.Bottom := Min(ItemRect.Top + ItemHeight, - ScrollingSupport.ClientRect.Bottom); + Exit; //==> + ItemRect.Bottom := Min(ItemRect.Top + ItemHeight, ScrollingSupport.ClientRect.Bottom); Redraw(ItemRect); + Result := ItemRect; end; @@ -318,11 +403,11 @@ begin if not PtInRect(ScrollingSupport.ClientRect, Event.Position) then begin Result := False; - exit; + Exit; //==> end; Index := (Event.Position.y - ScrollingSupport.ClientRect.Top + - ScrollingSupport.VerTFScrollBar.Position) div ItemHeight; + ScrollingSupport.VertScrollBar.Position) div ItemHeight; if (Index >= 0) and (Index < Items.Count) and ((Index <> ItemIndex) or (HotTrack and Event.InheritsFrom(TMouseReleasedEventObj))) then begin |