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lcl: grids: ignore WMSIZE when updating scrollbars. Solves part of issue #31715

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git-svn-id: trunk@54817 -
This commit is contained in:
ondrej 2017-05-05 22:49:59 +00:00
parent 43e271b439
commit 76e4dccfaa
1 changed files with 15 additions and 2 deletions
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17
lcl/grids.pas
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@ -155,7 +155,7 @@ type
TGridFlagsOption = (gfEditorUpdateLock, gfNeedsSelectActive, gfEditorTab,
gfRevEditorTab, gfVisualChange, gfColumnsLocked,
gfEditingDone, gfSizingStarted, gfPainting, gfUpdatingSize, gfClientRectChange,
gfAutoEditPending);
gfAutoEditPending, gfUpdatingScrollbar);
TGridFlags = set of TGridFlagsOption;
TSortOrder = (soAscending, soDescending);
@ -1122,6 +1122,7 @@ type
procedure UpdateBorderStyle;
function ValidateEntry(const ACol,ARow:Integer; const OldValue:string; var NewValue:string): boolean; virtual;
procedure VisualChange; virtual;
procedure WMSize(var Message: TLMSize); message LM_SIZE;
procedure WMHScroll(var message : TLMHScroll); message LM_HSCROLL;
procedure WMVScroll(var message : TLMVScroll); message LM_VSCROLL;
procedure WMKillFocus(var message: TLMKillFocus); message LM_KILLFOCUS;
@ -3305,7 +3306,12 @@ begin
{$Ifdef DbgScroll}
DebugLn('ScrollbarShow: Which=',SbToStr(Which), ' Avalue=',dbgs(AValue));
{$endif}
ShowScrollBar(Handle,Which,aValue);
Include(FGridFlags, gfUpdatingScrollbar);
try
ShowScrollBar(Handle,Which,aValue);
finally
Exclude(FGridFlags, gfUpdatingScrollbar);
end;
if Which in [SB_BOTH, SB_VERT] then FVSbVisible := Ord(AValue);
if Which in [SB_BOTH, SB_HORZ] then FHSbVisible := Ord(AValue);
end;
@ -4610,6 +4616,13 @@ begin
InvalidateFocused;
end;
procedure TCustomGrid.WMSize(var Message: TLMSize);
begin
if gfUpdatingScrollbar in FGridFlags then // ignore WMSize when updating scrollbars. issue #31715
Exit;
inherited WMSize(Message);
end;
class procedure TCustomGrid.WSRegisterClass;
begin
inherited WSRegisterClass;