1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_UI_GTK_GTK_FLOATING_CONTAINER_H_ 6 #define CHROME_BROWSER_UI_GTK_GTK_FLOATING_CONTAINER_H_ 7 #pragma once 8 9 #include <gdk/gdk.h> 10 #include <gtk/gtk.h> 11 12 // A specialized container, which is a cross between a GtkBin and a 13 // GtkFixed. This container dervies from GtkBin and the implementation of 14 // gtk_container_add() is the same: only one GtkWidget can be added through 15 // that interface. The GtkBin portion contains normal content and is given the 16 // same allocation that this container has. 17 // 18 // In addition, any number of widgets can be added through the 19 // gtk_floating_container_add_floating() method, which provides functionality 20 // similar to a GtkFixed. Unlike a GtkFixed, coordinates are not set when you 21 // gtk_fixed_put(). The location of the floating widgets is determined while 22 // running the "set-floating-position" signal, which is emitted during this 23 // container's "size-allocate" handler. 24 // 25 // The "set-floating-position" signal is (semi-)mandatory if you want widgets 26 // placed anywhere other than the origin and should have the following 27 // signature: 28 // 29 // void (*set_floating_position)(GtkFloatingContainer* container, 30 // GtkAllocation* allocation, 31 // gpointer userdata); 32 // 33 // Your handler should, for each floating widget, set the "x" and "y" child 34 // properties. 35 36 G_BEGIN_DECLS 37 38 #define GTK_TYPE_FLOATING_CONTAINER \ 39 (gtk_floating_container_get_type()) 40 #define GTK_FLOATING_CONTAINER(obj) \ 41 (G_TYPE_CHECK_INSTANCE_CAST((obj), GTK_TYPE_FLOATING_CONTAINER, \ 42 GtkFloatingContainer)) 43 #define GTK_FLOATING_CONTAINER_CLASS(klass) \ 44 (G_TYPE_CHECK_CLASS_CAST((klass), GTK_TYPE_FLOATING_CONTAINER, \ 45 GtkFloatingContainerClass)) 46 #define GTK_IS_FLOATING_CONTAINER(obj) \ 47 (G_TYPE_CHECK_INSTANCE_TYPE((obj), GTK_TYPE_FLOATING_CONTAINER)) 48 #define GTK_IS_FLOATING_CONTAINER_CLASS(klass) \ 49 (G_TYPE_CHECK_CLASS_TYPE((klass), GTK_TYPE_FLOATING_CONTAINER)) 50 #define GTK_FLOATING_CONTAINER_GET_CLASS(obj) \ 51 (G_TYPE_INSTANCE_GET_CLASS((obj), GTK_TYPE_FLOATING_CONTAINER, \ 52 GtkFloatingContainerClass)) 53 54 typedef struct _GtkFloatingContainer GtkFloatingContainer; 55 typedef struct _GtkFloatingContainerClass GtkFloatingContainerClass; 56 typedef struct _GtkFloatingContainerChild GtkFloatingContainerChild; 57 58 struct _GtkFloatingContainer { 59 // Parent class. 60 GtkBin bin; 61 62 // A GList of all our floating children, in GtkFloatingContainerChild 63 // structs. Owned by the GtkFloatingContainer. 64 GList* floating_children; 65 }; 66 67 struct _GtkFloatingContainerClass { 68 GtkBinClass parent_class; 69 }; 70 71 // Internal structure used to associate a widget and its x/y child properties. 72 struct _GtkFloatingContainerChild { 73 GtkWidget* widget; 74 gint x; 75 gint y; 76 }; 77 78 GType gtk_floating_container_get_type() G_GNUC_CONST; 79 GtkWidget* gtk_floating_container_new(); 80 void gtk_floating_container_add_floating(GtkFloatingContainer* container, 81 GtkWidget* widget); 82 // Use gtk_container_remove to remove all widgets; both widgets added with 83 // gtk_container_add() and gtk_floating_container_add_floating(). 84 85 G_END_DECLS 86 87 #endif // CHROME_BROWSER_UI_GTK_GTK_FLOATING_CONTAINER_H_ 88