Add GtkGizmo

GtkGizmo is the easiest possible widget to implement. It does nothing
except give its creator a way to control measure/size-allocate/snapshot,
so it can be used in a variety of use cases.

1 files changed, 58 insertions, 0 deletions

diff --git a/gtk/gtkgizmoprivate.h b/gtk/gtkgizmoprivate.h
new file mode 100644
index 0000000000..5fb78420c0
--- /dev/null
+++ b/gtk/gtkgizmoprivate.h
@@ -0,0 +1,58 @@
+
+#ifndef __GTK_GIZMO_H__
+#define __GTK_GIZMO_H__
+
+#include "gtkwidget.h"
+#include "gtkcssgadgetprivate.h"
+#include "gtkcsscustomgadgetprivate.h"
+
+#define GTK_TYPE_GIZMO                 (gtk_gizmo_get_type ())
+#define GTK_GIZMO(obj)                 (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_GIZMO, GtkGizmo))
+#define GTK_GIZMO_CLASS(klass)         (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_GIZMO, GtkGizmoClass))
+#define GTK_IS_GIZMO(obj)              (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_GIZMO))
+#define GTK_IS_GIZMO_CLASS(klass)      (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_GIZMO))
+#define GTK_GIZMO_GET_CLASS(obj)       (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_GIZMO, GtkGizmoClass))
+
+typedef struct _GtkGizmo             GtkGizmo;
+typedef struct _GtkGizmoClass        GtkGizmoClass;
+
+typedef void    (* GtkGizmoMeasureFunc)   (GtkGizmo       *gizmo,
+                                           GtkOrientation  orientation,
+                                           int             for_size,
+                                           int            *minimum,
+                                           int            *natural,
+                                           int            *minimum_baseline,
+                                           int            *natural_baseline);
+typedef void    (* GtkGizmoAllocateFunc)  (GtkGizmo            *gizmo,
+                                           const GtkAllocation *allocation,
+                                           int                  baseline,
+                                           GtkAllocation       *out_clip);
+typedef gboolean (* GtkGizmoSnapshotFunc) (GtkGizmo    *gizmo,
+                                           GtkSnapshot *snapshot);
+
+
+struct _GtkGizmo
+{
+  GtkWidget parent_instance;
+
+  GtkCssGadget *gadget;
+
+  GtkGizmoMeasureFunc  measure_func;
+  GtkGizmoAllocateFunc allocate_func;
+  GtkGizmoSnapshotFunc snapshot_func;
+};
+
+struct _GtkGizmoClass
+{
+  GtkWidgetClass parent_class;
+};
+
+GType      gtk_gizmo_get_type (void) G_GNUC_CONST;
+
+GtkWidget *gtk_gizmo_new (const char          *css_name,
+                          GtkGizmoMeasureFunc  measure_func,
+                          GtkGizmoAllocateFunc allocate_func,
+                          GtkGizmoSnapshotFunc snapshot_func);
+
+
+#endif