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Improve appearance of wxToolBar default disabled bitmaps on GTK3 with HiDPI

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If normal bitmap is HiDPI, use it to create default disabled bitmap
See #18225
This commit is contained in:
Paul Cornett
2019-03-25 09:02:09 -07:00
parent a9a0305758
commit 8ddf484d3e
1 changed files with 29 additions and 6 deletions
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35
src/gtk/toolbar.cpp
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@@ -181,7 +181,31 @@ image_expose_event(GtkWidget* widget, GdkEventExpose*, wxToolBarTool* tool)
#endif
{
#ifdef __WXGTK3__
const wxBitmap& bitmap = tool->GetBitmap();
wxBitmap bitmap(tool->GetNormalBitmap());
if (!tool->IsEnabled())
{
wxBitmap disabled(tool->GetDisabledBitmap());
// if no disabled bitmap and normal bitmap is scaled
if (!disabled.IsOk() && bitmap.IsOk() && bitmap.GetScaleFactor() > 1)
{
// make scaled disabled bitmap from normal one
disabled.CreateScaled(bitmap.GetScaledHeight(), bitmap.GetScaledWidth(),
32, bitmap.GetScaleFactor());
cairo_t* cr2 = disabled.CairoCreate();
// clear to transparent
cairo_set_operator(cr2, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba(cr2, 0, 0, 0, 0);
cairo_paint(cr2);
// draw in normal bitmap
bitmap.Draw(cr2, 0, 0);
// create disabled appearance, this seems to be how GTK does it
cairo_set_source_rgba(cr2, 0, 0, 0, 0);
cairo_paint_with_alpha(cr2, 0.5);
cairo_destroy(cr2);
}
bitmap = disabled;
}
if (!bitmap.IsOk() || (tool->IsEnabled() && bitmap.GetScaleFactor() <= 1))
return false;
#else
@@ -276,11 +300,10 @@ void wxToolBarTool::SetImage()
#ifdef __WXGTK3__
if (bitmap.GetScaleFactor() > 1)
{
// Use a scaled pixbuf with the correct logical size. It will be used
// for the disabled state if no disabled bitmap is specifed, otherwise
// the original will be used by our "draw" signal handler.
GdkPixbuf* pixbuf = gdk_pixbuf_scale_simple(bitmap.GetPixbuf(),
bitmap.GetScaledWidth(), bitmap.GetScaledHeight(), GDK_INTERP_BILINEAR);
// Use a placeholder pixbuf with the correct size.
// The original will be used by our "draw" signal handler.
GdkPixbuf* pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8,
bitmap.GetScaledWidth(), bitmap.GetScaledHeight());
gtk_image_set_from_pixbuf(GTK_IMAGE(image), pixbuf);
g_object_unref(pixbuf);
}