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Fix grid sample OnGridRender()

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Destroy current "frameRender" when creating a new render.

Make bitmap and frame size equal.

Closes https://github.com/wxWidgets/wxWidgets/pull/673
This commit is contained in:
John Roberts
2018-01-15 13:24:18 +01:00
committed by Vadim Zeitlin
parent ca5e944a67
commit 52e71680ea
1 changed files with 7 additions and 14 deletions
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21
samples/grid/griddemo.cpp
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@@ -2232,7 +2232,7 @@ void GridFrame::OnGridRender( wxCommandEvent& event )
int styleRender = 0, i;
bool useLometric = false, defSize = false;
double zoom = 1;
wxSize sizeMargin( 0, 0 );
wxSize sizeOffset( 0, 0 );
wxPoint pointOrigin( 0, 0 );
wxMenu* menu = GetMenuBar()->GetMenu( 0 );
@@ -2255,7 +2255,7 @@ void GridFrame::OnGridRender( wxCommandEvent& event )
{
pointOrigin.x += 50;
pointOrigin.y += 50;
sizeMargin.IncBy( 50 );
sizeOffset.IncBy( 50 );
}
if ( menu->FindItem( ID_RENDER_ZOOM )->IsChecked() )
zoom = 1.25;
@@ -2310,26 +2310,19 @@ void GridFrame::OnGridRender( wxCommandEvent& event )
sizeRender.y *= zoom;
// delete any existing render frame and create new one
wxWindow* win = FindWindow( "frameRender" );
wxWindow* win = FindWindowByName( "frameRender" );
if ( win )
win->Destroy();
// create a frame large enough for the rendered bitmap
wxFrame* frame = new wxFrame( this, wxID_ANY, "Grid Render" );
frame->SetClientSize( 780, 400 );
frame->SetClientSize( sizeRender + sizeOffset * 2 );
frame->SetName( "frameRender" );
wxPanel* canvas = new wxPanel( frame, wxID_ANY );
// make bitmap large enough for margins if any
if ( !defSize )
sizeRender.IncBy( sizeMargin * 2 );
else
sizeRender.IncBy( sizeMargin );
wxBitmap bmp( sizeRender );
// don't leave it larger or drawing will be scaled
sizeRender.DecBy( sizeMargin * 2 );
// make a bitmap large enough for any top/left offset
wxBitmap bmp( sizeRender + sizeOffset );
wxMemoryDC memDc(bmp);
// default row labels have no background colour so set background