Support for embedding native Windows UIs in Gtk2.

git-svn-id: http://svn.drobilla.net/lad/trunk/suil@4603 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 161 insertions, 0 deletions

diff --git a/src/win_in_gtk2.c b/src/win_in_gtk2.c
new file mode 100644
index 0000000..8367996
--- /dev/null
+++ b/src/win_in_gtk2.c
@@ -0,0 +1,161 @@
+/*
+  Copyright 2011-2012 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <string.h>
+
+#include <gtk/gtk.h>
+#include <gdk/gdkwin32.h>
+
+#include "./suil_internal.h"
+
+#define SUIL_TYPE_WIN_WRAPPER (suil_win_wrapper_get_type())
+#define SUIL_WIN_WRAPPER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), SUIL_TYPE_WIN_WRAPPER, SuilWinWrapper))
+
+typedef struct _SuilWinWrapper      SuilWinWrapper;
+typedef struct _SuilWinWrapperClass SuilWinWrapperClass;
+
+struct _SuilWinWrapper {
+	GtkDrawingArea area;
+	SuilWrapper*   wrapper;
+	SuilInstance*  instance;
+};
+
+struct _SuilWinWrapperClass {
+	GtkDrawingAreaClass parent_class;
+};
+
+GType suil_win_wrapper_get_type(void);  // Accessor for SUIL_TYPE_WIN_WRAPPER
+
+G_DEFINE_TYPE(SuilWinWrapper, suil_win_wrapper, GTK_TYPE_DRAWING_AREA)
+
+static void
+suil_win_wrapper_finalize(GObject* gobject)
+{
+	SuilWinWrapper* const self = SUIL_WIN_WRAPPER(gobject);
+
+	self->wrapper->impl = NULL;
+
+	G_OBJECT_CLASS(suil_win_wrapper_parent_class)->finalize(gobject);
+}
+
+static void
+suil_win_wrapper_class_init(SuilWinWrapperClass* klass)
+{
+	GObjectClass* const gobject_class = G_OBJECT_CLASS(klass);
+
+	gobject_class->finalize = suil_win_wrapper_finalize;
+}
+
+static void
+suil_win_wrapper_init(SuilWinWrapper* self)
+{
+	self->instance = NULL;
+}
+
+GdkFilterReturn
+event_filter(GdkXEvent* xevent, GdkEvent* event, gpointer data)
+{
+	SuilWinWrapper* wrap = (SuilWinWrapper*)data;
+	MSG*            msg  = (MSG*)xevent;
+	if (msg->message == WM_KEYDOWN || msg->message == WM_KEYUP) {
+		// Forward keyboard events to UI window
+		PostMessage((HWND)wrap->instance->ui_widget,
+		            msg->message, msg->wParam, msg->lParam);
+	}
+	return GDK_FILTER_CONTINUE;
+}
+
+static int
+wrapper_resize(LV2UI_Feature_Handle handle, int width, int height)
+{
+	gtk_drawing_area_size(GTK_DRAWING_AREA(handle), width, height);
+	return 0;
+}
+
+static int
+wrapper_wrap(SuilWrapper*  wrapper,
+             SuilInstance* instance)
+{
+	SuilWinWrapper* const wrap = SUIL_WIN_WRAPPER(wrapper->impl);
+
+	instance->host_widget = GTK_WIDGET(wrap);
+	wrap->wrapper         = wrapper;
+	wrap->instance        = instance;
+
+	return 0;
+}
+
+static void
+wrapper_free(SuilWrapper* wrapper)
+{
+	if (wrapper->impl) {
+		SuilWinWrapper* const wrap = SUIL_WIN_WRAPPER(wrapper->impl);
+		gtk_object_destroy(GTK_OBJECT(wrap));
+	}
+}
+
+SUIL_API
+SuilWrapper*
+suil_wrapper_new(SuilHost*      host,
+                 const char*    host_type_uri,
+                 const char*    ui_type_uri,
+                 LV2_Feature*** features,
+                 unsigned       n_features)
+{
+	GtkWidget* parent = NULL;
+	for (unsigned i = 0; i < n_features; ++i) {
+		if (!strcmp((*features)[i]->URI, LV2_UI__parent)) {
+			parent = (GtkWidget*)(*features)[i]->data;
+		}
+	}
+
+	if (!GTK_CONTAINER(parent)) {
+		SUIL_ERRORF("No GtkContainer parent given for %s UI\n",
+		            ui_type_uri);
+		return NULL;
+	}
+
+	SuilWrapper* wrapper = (SuilWrapper*)malloc(sizeof(SuilWrapper));
+	wrapper->wrap = wrapper_wrap;
+	wrapper->free = wrapper_free;
+
+	SuilWinWrapper* const wrap = SUIL_WIN_WRAPPER(
+		g_object_new(SUIL_TYPE_WIN_WRAPPER, NULL));
+
+	wrap->wrapper = NULL;
+
+	wrapper->impl             = wrap;
+	wrapper->resize.handle    = wrap;
+	wrapper->resize.ui_resize = wrapper_resize;
+
+	gtk_container_add(GTK_CONTAINER(parent), GTK_WIDGET(wrap));
+	gtk_widget_set_can_focus(GTK_WIDGET(wrap), TRUE);
+	gtk_widget_set_sensitive(GTK_WIDGET(wrap), TRUE);
+	gtk_widget_realize(GTK_WIDGET(wrap));
+
+	GdkWindow* window = gtk_widget_get_window(GTK_WIDGET(wrap));
+	GdkWindow* parent_window = gtk_widget_get_window(parent);
+	gdk_window_add_filter(parent_window, event_filter, wrap);
+	gdk_window_add_filter(window, event_filter, wrap);
+
+	suil_add_feature(features, &n_features, LV2_UI__parent,
+	                 GDK_WINDOW_HWND(window));
+
+	suil_add_feature(features, &n_features, LV2_UI__resize,
+	                 &wrapper->resize);
+
+	return wrapper;
+}