--- /dev/null
+/* Foreign drawing
+ *
+ * Many applications can't use GTK+ widgets, for a variety of reasons,
+ * but still want their user interface to appear integrated with the
+ * rest of the desktop, and follow GTK+ themes.
+ *
+ * This demo shows how to use GtkStyleContext and the gtk_render_ APIs
+ * to achieve this. Note that this is a very simple, non-interactive
+ * example.
+ */
+
+#include <gtk/gtk.h>
+#include <string.h>
+
+static void
+append_element (GtkWidgetPath *path,
+ const char *selector)
+{
+ static const struct {
+ const char *name;
+ GtkStateFlags state_flag;
+ } pseudo_classes[] = {
+ { "active", GTK_STATE_FLAG_ACTIVE },
+ { "hover", GTK_STATE_FLAG_PRELIGHT },
+ { "selected", GTK_STATE_FLAG_SELECTED },
+ { "disabled", GTK_STATE_FLAG_INSENSITIVE },
+ { "indeterminate", GTK_STATE_FLAG_INCONSISTENT },
+ { "focus", GTK_STATE_FLAG_FOCUSED },
+ { "backdrop", GTK_STATE_FLAG_BACKDROP },
+ { "dir(ltr)", GTK_STATE_FLAG_DIR_LTR },
+ { "dir(rtl)", GTK_STATE_FLAG_DIR_RTL },
+ { "link", GTK_STATE_FLAG_LINK },
+ { "visited", GTK_STATE_FLAG_VISITED },
+ { "checked", GTK_STATE_FLAG_CHECKED },
+ { "drop(active)", GTK_STATE_FLAG_DROP_ACTIVE }
+ };
+ const char *next;
+ char *name;
+ char type;
+ guint i;
+
+ next = strpbrk (selector, "#.:");
+ if (next == NULL)
+ next = selector + strlen (selector);
+
+ name = g_strndup (selector, next - selector);
+ if (g_ascii_isupper (selector[0]))
+ {
+ GType gtype;
+ gtype = g_type_from_name (name);
+ if (gtype == G_TYPE_INVALID)
+ {
+ g_critical ("Unknown type name `%s'", name);
+ g_free (name);
+ return;
+ }
+ gtk_widget_path_append_type (path, gtype);
+ }
+ else
+ {
+ /* Omit type, we're using name */
+ gtk_widget_path_append_type (path, G_TYPE_NONE);
+ gtk_widget_path_iter_set_object_name (path, -1, name);
+ }
+ g_free (name);
+
+ while (*next != '\0')
+ {
+ type = *next;
+ selector = next + 1;
+ next = strpbrk (selector, "#.:");
+ if (next == NULL)
+ next = selector + strlen (selector);
+ name = g_strndup (selector, next - selector);
+
+ switch (type)
+ {
+ case '#':
+ gtk_widget_path_iter_set_name (path, -1, name);
+ break;
+
+ case '.':
+ gtk_widget_path_iter_add_class (path, -1, name);
+ break;
+
+ case ':':
+ for (i = 0; i < G_N_ELEMENTS (pseudo_classes); i++)
+ {
+ if (g_str_equal (pseudo_classes[i].name, name))
+ {
+ gtk_widget_path_iter_set_state (path,
+ -1,
+ gtk_widget_path_iter_get_state (path, -1)
+ | pseudo_classes[i].state_flag);
+ break;
+ }
+ }
+ if (i == G_N_ELEMENTS (pseudo_classes))
+ g_critical ("Unknown pseudo-class :%s", name);
+ break;
+
+ default:
+ g_assert_not_reached ();
+ break;
+ }
+
+ g_free (name);
+ }
+}
+
+static GtkStyleContext *
+get_style (GtkStyleContext *parent,
+ const char *selector)
+{
+ GtkWidgetPath *path;
+ GtkStyleContext *context;
+
+ if (parent)
+ path = gtk_widget_path_copy (gtk_style_context_get_path (parent));
+ else
+ path = gtk_widget_path_new ();
+
+ append_element (path, selector);
+
+ context = gtk_style_context_new ();
+ gtk_style_context_set_path (context, path);
+ gtk_style_context_set_parent (context, parent);
+ gtk_widget_path_unref (path);
+
+ return context;
+}
+
+static void
+draw_horizontal_scrollbar (GtkWidget *widget,
+ cairo_t *cr,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ gint position,
+ GtkStateFlags state)
+{
+ GtkStyleContext *scrollbar_context;
+ GtkStyleContext *trough_context;
+ GtkStyleContext *slider_context;
+
+ /* This information is taken from the GtkScrollbar docs, see "CSS nodes" */
+ const char *path[3] = {
+ "scrollbar.horizontal",
+ "trough",
+ "slider"
+ };
+
+ scrollbar_context = get_style (NULL, path[0]);
+ trough_context = get_style (scrollbar_context, path[1]);
+ slider_context = get_style (trough_context, path[2]);
+
+ gtk_style_context_set_state (scrollbar_context, state);
+ gtk_style_context_set_state (trough_context, state);
+ gtk_style_context_set_state (slider_context, state);
+
+ gtk_render_background (trough_context, cr, x, y, width, height);
+ gtk_render_frame (trough_context, cr, x, y, width, height);
+ gtk_render_slider (slider_context, cr, x + position, y + 1, 30, height - 2, GTK_ORIENTATION_HORIZONTAL);
+
+ g_object_unref (slider_context);
+ g_object_unref (trough_context);
+ g_object_unref (scrollbar_context);
+}
+
+static void
+draw_text (GtkWidget *widget,
+ cairo_t *cr,
+ gint x,
+ gint y,
+ gint width,
+ gint height,
+ const gchar *text,
+ GtkStateFlags state)
+{
+ GtkStyleContext *label_context;
+ GtkStyleContext *selection_context;
+ GtkStyleContext *context;
+ PangoLayout *layout;
+
+ /* This information is taken from the GtkLabel docs, see "CSS nodes" */
+ const char *path[2] = {
+ "label.view",
+ "selection"
+ };
+
+ label_context = get_style (NULL, path[0]);
+ selection_context = get_style (label_context, path[1]);
+
+ gtk_style_context_set_state (label_context, state);
+
+ if (state & GTK_STATE_FLAG_SELECTED)
+ context = selection_context;
+ else
+ context = label_context;
+
+ layout = gtk_widget_create_pango_layout (widget, text);
+
+ gtk_render_background (context, cr, x, y, width, height);
+ gtk_render_frame (context, cr, x, y, width, height);
+ gtk_render_layout (context, cr, x, y, layout);
+
+ g_object_unref (layout);
+
+ g_object_unref (selection_context);
+ g_object_unref (label_context);
+}
+
+static void
+draw_check (GtkWidget *widget,
+ cairo_t *cr,
+ gint x,
+ gint y,
+ GtkStateFlags state)
+{
+ GtkStyleContext *button_context;
+ GtkStyleContext *check_context;
+
+ /* This information is taken from the GtkCheckButton docs, see "CSS nodes" */
+ const char *path[2] = {
+ "checkbutton",
+ "check"
+ };
+
+ button_context = get_style (NULL, path[0]);
+ check_context = get_style (button_context, path[1]);
+
+ gtk_style_context_set_state (check_context, state);
+
+ gtk_render_background (check_context, cr, x, y, 20, 20);
+ gtk_render_frame (check_context, cr, x, y, 20, 20);
+ gtk_render_check (check_context, cr, x, y, 20, 20);
+
+ g_object_unref (check_context);
+ g_object_unref (button_context);
+
+}
+
+static void
+draw_radio (GtkWidget *widget,
+ cairo_t *cr,
+ gint x,
+ gint y,
+ GtkStateFlags state)
+{
+ GtkStyleContext *button_context;
+ GtkStyleContext *check_context;
+
+ /* This information is taken from the GtkRadioButton docs, see "CSS nodes" */
+ const char *path[2] = {
+ "radiobutton",
+ "radio"
+ };
+
+ button_context = get_style (NULL, path[0]);
+ check_context = get_style (button_context, path[1]);
+
+ gtk_style_context_set_state (check_context, state);
+
+ gtk_render_background (check_context, cr, x, y, 20, 20);
+ gtk_render_frame (check_context, cr, x, y, 20, 20);
+ gtk_render_option (check_context, cr, x, y, 20, 20);
+
+ g_object_unref (check_context);
+ g_object_unref (button_context);
+
+}
+
+static gboolean
+draw_cb (GtkWidget *widget,
+ cairo_t *cr)
+{
+ gint width, height;
+
+ width = gtk_widget_get_allocated_width (widget);
+ height = gtk_widget_get_allocated_height (widget);
+
+ cairo_rectangle (cr, 0, 0, width, height);
+ cairo_set_source_rgb (cr, 0, 0, 0);
+ cairo_fill (cr);
+
+ draw_horizontal_scrollbar (widget, cr, 10, 10, width - 20, 10, 30, GTK_STATE_FLAG_NORMAL);
+ draw_horizontal_scrollbar (widget, cr, 10, 30, width - 20, 10, 40, GTK_STATE_FLAG_PRELIGHT);
+ draw_horizontal_scrollbar (widget, cr, 10, 50, width - 20, 10, 50, GTK_STATE_FLAG_ACTIVE|GTK_STATE_FLAG_PRELIGHT);
+
+ draw_text (widget, cr, 10, 70, width - 20, 20, "Not selected", GTK_STATE_FLAG_NORMAL);
+ draw_text (widget, cr, 10, 100, width - 20, 20, "Selected", GTK_STATE_FLAG_SELECTED);
+
+ draw_check (widget, cr, 10, 130, GTK_STATE_FLAG_NORMAL);
+ draw_check (widget, cr, 40, 130, GTK_STATE_FLAG_CHECKED);
+ draw_radio (widget, cr, 70, 130, GTK_STATE_FLAG_NORMAL);
+ draw_radio (widget, cr, 100, 130, GTK_STATE_FLAG_CHECKED);
+
+ return FALSE;
+}
+
+GtkWidget *
+do_foreigndrawing (GtkWidget *do_widget)
+{
+ static GtkWidget *window = NULL;
+
+ if (!window)
+ {
+ GtkWidget *box;
+ GtkWidget *da;
+
+ window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+ gtk_window_set_title (GTK_WINDOW (window), "Foreign drawing");
+ gtk_window_set_screen (GTK_WINDOW (window),
+ gtk_widget_get_screen (do_widget));
+ g_signal_connect (window, "destroy",
+ G_CALLBACK (gtk_widget_destroyed), &window);
+
+ box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
+ gtk_container_add (GTK_CONTAINER (window), box);
+ da = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (da, 200, 200);
+ gtk_widget_set_hexpand (da, TRUE);
+ gtk_widget_set_vexpand (da, TRUE);
+ gtk_widget_set_app_paintable (da, TRUE);
+ gtk_container_add (GTK_CONTAINER (box), da);
+
+ g_signal_connect (da, "draw", G_CALLBACK (draw_cb), NULL);
+ }
+
+ if (!gtk_widget_get_visible (window))
+ gtk_widget_show_all (window);
+ else
+ gtk_widget_destroy (window);
+
+ return window;
+}
+++ /dev/null
-/* foreign-drawing.c
- * Copyright (C) 2015 Red Hat, Inc
- * Author: Matthias Clasen
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <gtk/gtk.h>
-
-#include <string.h>
-
-static void
-append_element (GtkWidgetPath *path,
- const char *selector)
-{
- static const struct {
- const char *name;
- GtkStateFlags state_flag;
- } pseudo_classes[] = {
- { "active", GTK_STATE_FLAG_ACTIVE },
- { "hover", GTK_STATE_FLAG_PRELIGHT },
- { "selected", GTK_STATE_FLAG_SELECTED },
- { "disabled", GTK_STATE_FLAG_INSENSITIVE },
- { "indeterminate", GTK_STATE_FLAG_INCONSISTENT },
- { "focus", GTK_STATE_FLAG_FOCUSED },
- { "backdrop", GTK_STATE_FLAG_BACKDROP },
- { "dir(ltr)", GTK_STATE_FLAG_DIR_LTR },
- { "dir(rtl)", GTK_STATE_FLAG_DIR_RTL },
- { "link", GTK_STATE_FLAG_LINK },
- { "visited", GTK_STATE_FLAG_VISITED },
- { "checked", GTK_STATE_FLAG_CHECKED },
- { "drop(active)", GTK_STATE_FLAG_DROP_ACTIVE }
- };
- const char *next;
- char *name;
- char type;
- guint i;
-
- next = strpbrk (selector, "#.:");
- if (next == NULL)
- next = selector + strlen (selector);
-
- name = g_strndup (selector, next - selector);
- if (g_ascii_isupper (selector[0]))
- {
- GType gtype;
- gtype = g_type_from_name (name);
- if (gtype == G_TYPE_INVALID)
- {
- g_critical ("Unknown type name `%s'", name);
- g_free (name);
- return;
- }
- gtk_widget_path_append_type (path, gtype);
- }
- else
- {
- /* Omit type, we're using name */
- gtk_widget_path_append_type (path, G_TYPE_NONE);
- gtk_widget_path_iter_set_object_name (path, -1, name);
- }
- g_free (name);
-
- while (*next != '\0')
- {
- type = *next;
- selector = next + 1;
- next = strpbrk (selector, "#.:");
- if (next == NULL)
- next = selector + strlen (selector);
- name = g_strndup (selector, next - selector);
-
- switch (type)
- {
- case '#':
- gtk_widget_path_iter_set_name (path, -1, name);
- break;
-
- case '.':
- gtk_widget_path_iter_add_class (path, -1, name);
- break;
-
- case ':':
- for (i = 0; i < G_N_ELEMENTS (pseudo_classes); i++)
- {
- if (g_str_equal (pseudo_classes[i].name, name))
- {
- gtk_widget_path_iter_set_state (path,
- -1,
- gtk_widget_path_iter_get_state (path, -1)
- | pseudo_classes[i].state_flag);
- break;
- }
- }
- if (i == G_N_ELEMENTS (pseudo_classes))
- g_critical ("Unknown pseudo-class :%s", name);
- break;
-
- default:
- g_assert_not_reached ();
- break;
- }
-
- g_free (name);
- }
-}
-
-static GtkStyleContext *
-get_style (GtkStyleContext *parent,
- const char *selector)
-{
- GtkWidgetPath *path;
- GtkStyleContext *context;
-
- if (parent)
- path = gtk_widget_path_copy (gtk_style_context_get_path (parent));
- else
- path = gtk_widget_path_new ();
-
- append_element (path, selector);
-
- context = gtk_style_context_new ();
- gtk_style_context_set_path (context, path);
- gtk_style_context_set_parent (context, parent);
- /* XXX: Why is this necessary? */
- gtk_style_context_set_state (context, gtk_widget_path_iter_get_state (path, -1));
- gtk_widget_path_unref (path);
-
- return context;
-}
-
-static void
-draw_horizontal_scrollbar (GtkWidget *widget,
- cairo_t *cr,
- gint x,
- gint y,
- gint width,
- gint height,
- gint position,
- GtkStateFlags state)
-{
- GtkStyleContext *scrollbar_context;
- GtkStyleContext *trough_context;
- GtkStyleContext *slider_context;
-
- /* This information is taken from the GtkScrollbar docs, see "CSS nodes" */
- const char *path[3] = {
- "scrollbar.horizontal",
- "trough",
- "slider"
- };
-
- scrollbar_context = get_style (NULL, path[0]);
- trough_context = get_style (scrollbar_context, path[1]);
- slider_context = get_style (trough_context, path[2]);
-
- gtk_style_context_set_state (scrollbar_context, state);
- gtk_style_context_set_state (trough_context, state);
- gtk_style_context_set_state (slider_context, state);
-
- gtk_render_background (trough_context, cr, x, y, width, height);
- gtk_render_frame (trough_context, cr, x, y, width, height);
- gtk_render_slider (slider_context, cr, x + position, y + 1, 30, height - 2, GTK_ORIENTATION_HORIZONTAL);
-
- g_object_unref (slider_context);
- g_object_unref (trough_context);
- g_object_unref (scrollbar_context);
-}
-
-static void
-draw_text (GtkWidget *widget,
- cairo_t *cr,
- gint x,
- gint y,
- gint width,
- gint height,
- const gchar *text,
- GtkStateFlags state)
-{
- GtkStyleContext *label_context;
- GtkStyleContext *selection_context;
- GtkStyleContext *context;
- PangoLayout *layout;
-
- /* This information is taken from the GtkLabel docs, see "CSS nodes" */
- const char *path[2] = {
- "label.view",
- "selection"
- };
-
- label_context = get_style (NULL, path[0]);
- selection_context = get_style (label_context, path[1]);
-
- gtk_style_context_set_state (label_context, state);
-
- if (state & GTK_STATE_FLAG_SELECTED)
- context = selection_context;
- else
- context = label_context;
-
- layout = gtk_widget_create_pango_layout (widget, text);
-
- gtk_render_background (context, cr, x, y, width, height);
- gtk_render_frame (context, cr, x, y, width, height);
- gtk_render_layout (context, cr, x, y, layout);
-
- g_object_unref (layout);
-
- g_object_unref (selection_context);
- g_object_unref (label_context);
-}
-
-static void
-draw_check (GtkWidget *widget,
- cairo_t *cr,
- gint x,
- gint y,
- GtkStateFlags state)
-{
- GtkStyleContext *button_context;
- GtkStyleContext *check_context;
-
- /* This information is taken from the GtkCheckButton docs, see "CSS nodes" */
- const char *path[2] = {
- "checkbutton",
- "check"
- };
-
- button_context = get_style (NULL, path[0]);
- check_context = get_style (button_context, path[1]);
-
- gtk_style_context_set_state (check_context, state);
-
- gtk_render_background (check_context, cr, x, y, 20, 20);
- gtk_render_frame (check_context, cr, x, y, 20, 20);
- gtk_render_check (check_context, cr, x, y, 20, 20);
-
- g_object_unref (check_context);
- g_object_unref (button_context);
-
-}
-
-static void
-draw_radio (GtkWidget *widget,
- cairo_t *cr,
- gint x,
- gint y,
- GtkStateFlags state)
-{
- GtkStyleContext *button_context;
- GtkStyleContext *check_context;
-
- /* This information is taken from the GtkRadioButton docs, see "CSS nodes" */
- const char *path[2] = {
- "radiobutton",
- "radio"
- };
-
- button_context = get_style (NULL, path[0]);
- check_context = get_style (button_context, path[1]);
-
- gtk_style_context_set_state (check_context, state);
-
- gtk_render_background (check_context, cr, x, y, 20, 20);
- gtk_render_frame (check_context, cr, x, y, 20, 20);
- gtk_render_option (check_context, cr, x, y, 20, 20);
-
- g_object_unref (check_context);
- g_object_unref (button_context);
-
-}
-
-static gboolean
-draw_cb (GtkWidget *widget,
- cairo_t *cr)
-{
- gint width, height;
-
- width = gtk_widget_get_allocated_width (widget);
- height = gtk_widget_get_allocated_height (widget);
-
- cairo_rectangle (cr, 0, 0, width, height);
- cairo_set_source_rgb (cr, 0, 0, 0);
- cairo_fill (cr);
-
- draw_horizontal_scrollbar (widget, cr, 10, 10, width - 20, 10, 30, GTK_STATE_FLAG_NORMAL);
- draw_horizontal_scrollbar (widget, cr, 10, 30, width - 20, 10, 40, GTK_STATE_FLAG_PRELIGHT);
- draw_horizontal_scrollbar (widget, cr, 10, 50, width - 20, 10, 50, GTK_STATE_FLAG_ACTIVE|GTK_STATE_FLAG_PRELIGHT);
-
- draw_text (widget, cr, 10, 70, width - 20, 20, "Not selected", GTK_STATE_FLAG_NORMAL);
- draw_text (widget, cr, 10, 100, width - 20, 20, "Selected", GTK_STATE_FLAG_SELECTED);
-
- draw_check (widget, cr, 10, 130, GTK_STATE_FLAG_NORMAL);
- draw_check (widget, cr, 40, 130, GTK_STATE_FLAG_CHECKED);
- draw_radio (widget, cr, 70, 130, GTK_STATE_FLAG_NORMAL);
- draw_radio (widget, cr, 100, 130, GTK_STATE_FLAG_CHECKED);
-
- return FALSE;
-}
-
-int
-main (int argc, char *argv[])
-{
- GtkWidget *window;
- GtkWidget *box;
- GtkWidget *da;
-
- gtk_init (NULL, NULL);
-
- window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
- box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
- gtk_container_add (GTK_CONTAINER (window), box);
- da = gtk_drawing_area_new ();
- gtk_widget_set_size_request (da, 200, 200);
- gtk_widget_set_hexpand (da, TRUE);
- gtk_widget_set_vexpand (da, TRUE);
- gtk_widget_set_app_paintable (da, TRUE);
- gtk_container_add (GTK_CONTAINER (box), da);
-
- g_signal_connect (da, "draw", G_CALLBACK (draw_cb), NULL);
-
- gtk_widget_show_all (window);
-
- gtk_main ();
-
- return 0;
-}
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