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It's possible now to save to a PNG. OK, I still

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have performance problems, but it's a start.
  Updated install.txt.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@662 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robert Roebling
1998-09-03 21:46:47 +00:00
parent 24d20a8f73
commit cf7a7e133b
17 changed files with 487 additions and 63 deletions
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29
samples/png/pngdemo.cpp
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@@ -52,6 +52,7 @@ bool MyApp::OnInit(void)
wxMenu *help_menu = new wxMenu;
file_menu->Append(PNGDEMO_LOAD_FILE, "&Load file", "Load file");
file_menu->Append(PNGDEMO_SAVE_FILE, "&Save file", "Save file");
file_menu->Append(PNGDEMO_QUIT, "E&xit", "Quit program");
help_menu->Append(PNGDEMO_ABOUT, "&About", "About PNG demo");
@@ -80,6 +81,7 @@ BEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU(PNGDEMO_QUIT, MyFrame::OnQuit)
EVT_MENU(PNGDEMO_ABOUT, MyFrame::OnAbout)
EVT_MENU(PNGDEMO_LOAD_FILE, MyFrame::OnLoadFile)
EVT_MENU(PNGDEMO_SAVE_FILE, MyFrame::OnSaveFile)
END_EVENT_TABLE()
// Define my frame constructor
@@ -100,6 +102,33 @@ void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
"About PNG Demo", wxOK);
}
void MyFrame::OnSaveFile(wxCommandEvent& WXUNUSED(event))
{
char *f = wxFileSelector( "Save Image", (const char *)NULL, (const char *)NULL,
"png", "PNG files (*.png)|*.png" );
if (!f) return;
wxBitmap *backstore = new wxBitmap( 150, 150 );
wxMemoryDC memDC;
memDC.SelectObject( *backstore );
memDC.Clear();
memDC.SetBrush( *wxBLACK_BRUSH );
memDC.SetPen( *wxWHITE_PEN );
memDC.DrawRectangle( 0, 0, 150, 150 );
memDC.SetPen( *wxBLACK_PEN );
memDC.DrawLine( 0, 0, 0, 10 );
memDC.SetTextForeground( *wxWHITE );
memDC.DrawText( "This is a memory dc.", 10, 10 );
memDC.SelectObject( wxNullBitmap );
backstore->SaveFile( f, wxBITMAP_TYPE_PNG, (wxPalette*)NULL );
delete backstore;
}
void MyFrame::OnLoadFile(wxCommandEvent& WXUNUSED(event))
{
// Show file selector.