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convert CairoIcon into a NO_WINDOW widget that just draws into its parent widget

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This commit is contained in:
Paul Davis 2015-07-25 08:40:40 -04:00
parent 0ac1755394
commit 5e0337a4a3
2 changed files with 70 additions and 4 deletions
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66
libs/gtkmm2ext/cairo_icon.cc
View File

@ -17,6 +17,11 @@
*/
#if !defined USE_CAIRO_IMAGE_SURFACE && !defined NDEBUG
#define OPTIONAL_CAIRO_IMAGE_SURFACE
#endif
#include "gtkmm2ext/cairo_icon.h"
#include "gtkmm2ext/gtk_ui.h"
@ -26,8 +31,7 @@ CairoIcon::CairoIcon (ArdourIcon::Icon t, uint32_t foreground_color)
: icon_type (t)
, fg (foreground_color)
{
set_draw_background (false);
set_widget_prelight (false);
add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
}
CairoIcon::~CairoIcon ()
@ -51,3 +55,61 @@ CairoIcon::render (cairo_t* cr , cairo_rectangle_t* area)
ArdourIcon::render (cr, icon_type, width, height, Off, fg);
}
bool
CairoIcon::on_expose_event (GdkEventExpose *ev)
{
#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE
Cairo::RefPtr<Cairo::Context> cr;
if (getenv("ARDOUR_IMAGE_SURFACE")) {
if (!image_surface) {
image_surface = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, get_width(), get_height());
}
cr = Cairo::Context::create (image_surface);
} else {
cr = get_window()->create_cairo_context ();
}
#elif defined USE_CAIRO_IMAGE_SURFACE
if (!image_surface) {
image_surface = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, get_width(), get_height());
}
Cairo::RefPtr<Cairo::Context> cr = Cairo::Context::create (image_surface);
#else
Cairo::RefPtr<Cairo::Context> cr = get_window()->create_cairo_context ();
#endif
cr->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height);
cr->clip ();
cr->translate (ev->area.x, ev->area.y);
cairo_rectangle_t expose_area;
expose_area.x = ev->area.x;
expose_area.y = ev->area.y;
expose_area.width = ev->area.width;
expose_area.height = ev->area.height;
CairoIcon::render (cr->cobj(), &expose_area);
#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE
if (getenv("ARDOUR_IMAGE_SURFACE")) {
#endif
#if defined USE_CAIRO_IMAGE_SURFACE || defined OPTIONAL_CAIRO_IMAGE_SURFACE
image_surface->flush();
/* now blit our private surface back to the GDK one */
Cairo::RefPtr<Cairo::Context> cairo_context = get_window()->create_cairo_context ();
cairo_context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height);
cairo_context->clip ();
cairo_context->set_source (image_surface, 0, 0);
cairo_context->set_operator (Cairo::OPERATOR_SOURCE);
cairo_context->paint ();
#endif
#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE
}
#endif
return true;
}

8
libs/gtkmm2ext/gtkmm2ext/cairo_icon.h
View File

@ -20,8 +20,9 @@
#ifndef __gtk2_ardour_cairo_icon_h__
#define __gtk2_ardour_cairo_icon_h__
#include <gtkmm/bin.h>
#include "gtkmm2ext/visibility.h"
#include "gtkmm2ext/cairo_widget.h"
#include "gtkmm2ext/ardour_icon.h"
/** A parent class for icons that are rendered using Cairo but need to be
@ -30,7 +31,7 @@
namespace Gtkmm2ext {
class LIBGTKMM2EXT_API CairoIcon : public CairoWidget
class LIBGTKMM2EXT_API CairoIcon : public Gtk::Bin
{
public:
CairoIcon (Gtkmm2ext::ArdourIcon::Icon, uint32_t fg = 0x000000ff);
@ -38,8 +39,11 @@ public:
void render (cairo_t *, cairo_rectangle_t*);
void set_fg (uint32_t fg);
bool on_expose_event (GdkEventExpose*);
private:
Cairo::RefPtr<Cairo::Surface> image_surface;
ArdourIcon::Icon icon_type;
uint32_t fg;
};