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Qt: Completely rewritten SetScrollInfo() & GetScrollInfo(), now scrollbars works ok and faster since invalidating of scrollbar is out of this routines now. Fixed EnableWindow() bug by reimplementation of SetScrollInfo() & GetScrollInfo().

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git-svn-id: trunk@12241 -
This commit is contained in:
zeljko 2007-09-29 15:01:58 +00:00
parent fcf28f8985
commit c565a39dde
3 changed files with 56 additions and 121 deletions
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151
lcl/interfaces/qt/qtwinapi.inc
View File

@ -1232,18 +1232,17 @@ function TQtWidgetSet.EnableScrollBar(Wnd: HWND; wSBflags, wArrows: Cardinal): B
begin
{maybe we can put creating of scrollbar here instead of SetScrollInfo() }
Result := False;
{$ifdef VerboseQtWinAPI_MISSING_IMPLEMENTATION}
// {$ifdef VerboseQtWinAPI_MISSING_IMPLEMENTATION}
WriteLn('***** [WinAPI TQtWidgetSet.EnableScrollbar] missing implementation ');
{$endif}
// {$endif}
end;
function TQtWidgetSet.EnableWindow(hWnd: HWND; bEnable: Boolean): Boolean;
begin
Result := True;
{$ifdef VerboseQtWinAPI_MISSING_IMPLEMENTATION}
WriteLn('***** [WinAPI TQtWidgetSet.EnableWindow] possible wrong implementation');
{$ifdef VerboseQtWinAPI}
WriteLn('[WinAPI EnableWindow] ');
{$endif}
if not (TQtWidget(hWnd).LCLObject is TScrollBar) then
Result := QWidget_isEnabled(TQtWidget(hWnd).Widget);
TQtWidget(hWnd).setEnabled(bEnable);
end;
@ -2400,9 +2399,12 @@ end;
{------------------------------------------------------------------------------
Function: GetScrollInfo
Params: BarFlag
SB_CTL Retrieves the parameters for a scroll bar control. The hwnd parameter must be the handle to the scroll bar control.
SB_HORZ Retrieves the parameters for the window's standard horizontal scroll bar.
SB_VERT Retrieves the parameters for the window's standard vertical scroll bar.
SB_CTL Retrieves the parameters for a scroll bar control. The hwnd
parameter must be the handle to the scroll bar control.
SB_HORZ Retrieves the parameters for the window's standard horizontal
scroll bar.
SB_VERT Retrieves the parameters for the window's standard vertical
scroll bar.
ScrollInfo returns TScrollInfo structure.
@ -2418,14 +2420,6 @@ begin
if Handle = 0 then exit;
ScrollInfo.nTrackPos := 0;
ScrollInfo.nPage := 0;
ScrollInfo.nMax := 0;
ScrollInfo.nMin := 0;
ScrollInfo.nPos := 0;
ScrollInfo.fMask := SIF_UPDATEPOLICY;
ScrollInfo.cbSize := SizeOf(ScrollInfo);
if (csDestroying in TQtWidget(Handle).LCLObject.ComponentState) or
(csFreeNotification in TQtWidget(Handle).LCLObject.ComponentState) then
exit;
@ -2442,17 +2436,9 @@ begin
SB_VERT: QtScrollBar := TQtAbstractScrollArea(Handle).verticalScrollBar;
end;
if QtScrollBar = nil then exit;
if QtScrollBar = nil then exit
else FScrollBar := TScrollBar(QtScrollBar.LCLObject);
ScrollInfo.nTrackPos := 0;
ScrollInfo.nMax := QtScrollBar.getMax;
ScrollInfo.nMin := QtScrollBar.getMin;
ScrollInfo.nPage := QtScrollBar.getPageStep;
ScrollInfo.nPos := QtScrollBar.getValue;
ScrollInfo.fMask := SIF_ALL;
ScrollInfo.cbSize := SizeOf(ScrollInfo);
Result := True;
end else
Result := False;
end
@ -2464,12 +2450,23 @@ begin
if (csDestroying in FScrollBar.ComponentState) then exit;
ScrollInfo.nTrackPos := 0; {TODO: according to msdn this is ignored in SetScrollInfo()}
ScrollInfo.nPage := FScrollBar.PageSize;
ScrollInfo.nMax := FScrollBar.Max;
ScrollInfo.nMin := FScrollBar.Min;
// POS
if (ScrollInfo.fMask and SIF_POS) <> 0 then
ScrollInfo.nPos := FScrollBar.Position;
ScrollInfo.cbSize := SizeOf(ScrollInfo);
// RANGE
if (ScrollInfo.fMask and SIF_RANGE) <> 0
then begin
ScrollInfo.nMin:= FScrollBar.Min;
ScrollInfo.nMax:= FScrollBar.Max;
end;
// PAGE
if (ScrollInfo.fMask and SIF_PAGE) <> 0 then
ScrollInfo.nPage := FScrollBar.PageSize;
// TRACKPOS TrackPos is setted up as in gtk implementation
if (ScrollInfo.fMask and SIF_TRACKPOS) <> 0 then
ScrollInfo.nTrackPos := FScrollBar.Position;
Result := True;
end;
@ -4023,7 +4020,6 @@ var
ScrollBar: TScrollBar;
FScrollInfo: TScrollInfo;
R: TRect;
FRepaint: Boolean;
function PrepareScrollInfo: Integer;
var
@ -4041,11 +4037,10 @@ begin
if GetScrollInfo(Handle, SBStyle, FScrollInfo) then
begin
{impossible cases}
if (ScrollInfo.nMax < 0)
or (Integer(ScrollInfo.nPage) > ScrollInfo.nMax) then
exit;
if (ScrollInfo.nMax < 0) or
(Integer(ScrollInfo.nPage) > ScrollInfo.nMax) then exit;
if (ScrollInfo.FMask or SIF_RANGE) = ScrollInfo.FMask then
if (ScrollInfo.FMask and SIF_RANGE) <> 0 then
begin
FScrollInfo.nMin := ScrollInfo.nMin;
FScrollInfo.nMax := ScrollInfo.nMax;
@ -4060,23 +4055,18 @@ begin
{ - (ScrollInfo.nMax div 4 PageStep property)); }
end;
if (ScrollInfo.FMask or SIF_PAGE) = ScrollInfo.FMask then
if (ScrollInfo.FMask and SIF_PAGE) <> 0 then
begin
FScrollInfo.nPage := ScrollInfo.nPage;
{segfaults if we don't check Enabled property !}
if ScrollBar.Enabled then
begin
{default Qt minimum size}
if ScrollInfo.nPage < 10 then
ScrollBar.PageSize := ScrollBar.Max
else
ScrollBar.PageSize := ScrollInfo.nPage;
end;
end;
if (ScrollInfo.FMask or SIF_POS) = ScrollInfo.FMask then
if (ScrollInfo.FMask and SIF_POS) <> 0 then
begin
FScrollInfo.nPos := ScrollInfo.nPos;
FScrollInfo.nTrackPos := ScrollInfo.nPos;
if (FScrollInfo.nPos < ScrollBar.Min) then
FScrollInfo.nPos := ScrollBar.Min
@ -4088,56 +4078,12 @@ begin
ScrollBar.Position := FScrollInfo.nPos;
end;
if (ScrollInfo.FMask or SIF_TRACKPOS) = ScrollInfo.FMask then
if (ScrollInfo.FMask and SIF_TRACKPOS) <> 0 then
begin
FScrollInfo.nTrackPos := ScrollInfo.nTrackPos;
{TODO: TQtScrollBar(ScrollBar.Handle).setTracking(True); via SB_THUMBTRACK }
end;
if (ScrollInfo.FMask or SIF_ALL) = ScrollInfo.FMask then
begin
FScrollInfo.nPage := ScrollInfo.nPage;
FScrollInfo.nPos := ScrollInfo.nPos;
if (FScrollInfo.nPos < ScrollBar.Min) then
FScrollInfo.nPos := ScrollBar.Min
else
if (FScrollInfo.nPos > ScrollBar.Max) then
FScrollInfo.nPos := ScrollBar.Max;
FScrollInfo.nMin := ScrollInfo.nMin;
FScrollInfo.nMax := ScrollInfo.nMax;
ScrollBar.Min := ScrollInfo.nMin;
ScrollBar.Max := ScrollInfo.nMax;
{segfaults if we don't check Enabled property !}
if ScrollBar.Enabled then
begin
{default Qt minimum size}
if ScrollInfo.nPage < 10 then
ScrollBar.PageSize := ScrollBar.Max
else
ScrollBar.PageSize := ScrollInfo.nPage;
end;
if (ScrollBar.Position <> FScrollInfo.nPos) then
ScrollBar.Position := FScrollInfo.nPos;
end;
if (ScrollInfo.FMask or SIF_DISABLENOSCROLL) = ScrollInfo.FMask then
begin
{This value is used only when setting a scroll bar''s parameters.
If the scroll bar's new parameters make the scroll bar unnecessary,
disable the scroll bar instead of removing it.}
ScrollBar.Enabled := False;
end else
begin
if not ScrollBar.Enabled then
begin
ScrollBar.Enabled := True;
ScrollBar.Invalidate;
end;
end;
ScrollInfo := FScrollInfo;
Result := FScrollInfo.nPos;
end;
@ -4148,7 +4094,6 @@ begin
if (Handle = 0) then exit;
FRepaint := False;
ScrollBar := NiL;
case SBStyle of
@ -4161,10 +4106,8 @@ begin
SB_CTL:
begin
{HWND is always TScrollBar, but seem that Create ScrollBar should be called here }
if (csReading in TQtWidget(Handle).LCLObject.ComponentState)
or (csDestroying in TQtWidget(Handle).LCLObject.ComponentState)
then
exit;
if (csReading in TQtWidget(Handle).LCLObject.ComponentState) or
(csDestroying in TQtWidget(Handle).LCLObject.ComponentState) then exit;
ScrollBar := TScrollBar(TQtWidget(Handle).LCLObject);
@ -4176,8 +4119,6 @@ begin
exit; {still creating ... set it to Nil because of PrepareScrollInfo() }
end;
FRepaint := bRedraw and not ScrollBar.Visible;
ScrollBar.Visible := bRedraw;
end; {SB_CTL}
@ -4213,11 +4154,9 @@ begin
TQtAbstractScrollArea(Handle).horizontalScrollBar.Show;
end;
end;
if Assigned(ScrollBar) then
begin
FRepaint := bRedraw and not ScrollBar.Visible;
ScrollBar.Visible := bRedraw;
end;
end; {SB_HORZ}
@ -4255,24 +4194,16 @@ begin
end;
end;
if Assigned(ScrollBar) then
begin
FRepaint := bRedraw and not ScrollBar.Visible;
ScrollBar.Visible := bRedraw;
end;
end; {SB_VERT}
end;
if Assigned(ScrollBar) then
begin
if FRepaint then ScrollBar.Invalidate;
if bRedraw
then
if Assigned(ScrollBar) and bRedraw then
Result := PrepareScrollInfo;
end;
end;

6
lcl/interfaces/qt/qtwsstdctrls.pp
View File

@ -361,7 +361,10 @@ begin
QtScrollBar := TQtScrollBar(AScrollBar.Handle);
{feels much better with *2 pagesize}
QtScrollBar.setPageStep(AScrollBar.PageSize * 2);
QtScrollBar.setPageStep(AScrollBar.PageSize);
QtScrollBar.setSingleStep((AScrollBar.PageSize div 6) + 1);
QtScrollBar.setRange(AScrollBar.Min, AScrollBar.Max);
QtScrollBar.setValue(AScrollBar.Position);
@ -369,6 +372,7 @@ begin
RA := QtScrollBar.LCLObject.ClientRect;
RB := AScrollBar.ClientRect;
if not EqualRect(RA, RB) then
QWidget_setGeometry(QtScrollbar.Widget,AScrollBar.Left,AScrollBar.Top,AScrollBar.Width,AScrollBar.Height);
{don't update geometry each time}