forked from AuroraMiddleware/gtk
144 lines
4.3 KiB
C
144 lines
4.3 KiB
C
/* foreign-drawing.c
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* Copyright (C) 2015 Red Hat, Inc
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* Author: Matthias Clasen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <gtk/gtk.h>
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typedef struct {
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GType type;
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const gchar *name;
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const gchar *class1;
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const gchar *class2;
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} PathElt;
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static GtkStyleContext *
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get_style (PathElt pelt[], gint n_elts)
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{
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GtkWidgetPath *path;
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gint i;
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GtkStyleContext *context;
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path = gtk_widget_path_new ();
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for (i = 0; i < n_elts; i++)
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{
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gtk_widget_path_append_type (path, pelt[i].type);
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if (pelt[i].name)
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gtk_widget_path_iter_set_object_name (path, i, pelt[i].name);
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if (pelt[i].class1)
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gtk_widget_path_iter_add_class (path, i, pelt[i].class1);
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if (pelt[i].class2)
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gtk_widget_path_iter_add_class (path, i, pelt[i].class2);
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}
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context = gtk_style_context_new ();
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gtk_style_context_set_path (context, path);
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gtk_widget_path_unref (path);
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return context;
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}
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static void
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draw_horizontal_scrollbar (GtkWidget *widget,
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cairo_t *cr,
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gint x,
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gint y,
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gint width,
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gint height,
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gint position,
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GtkStateFlags state)
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{
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GtkStyleContext *scrollbar_context;
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GtkStyleContext *trough_context;
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GtkStyleContext *slider_context;
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PathElt scrollbar_path[1] = {
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{ GTK_TYPE_SCROLLBAR, "scrollbar", "horizontal", NULL },
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};
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PathElt trough_path[2] = {
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{ GTK_TYPE_SCROLLBAR, "scrollbar", "horizontal", NULL },
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{ G_TYPE_NONE, "trough", NULL, NULL }
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};
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PathElt slider_path[3] = {
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{ GTK_TYPE_SCROLLBAR, "scrollbar", "horizontal", NULL },
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{ G_TYPE_NONE, "trough", NULL, NULL },
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{ G_TYPE_NONE, "slider", NULL, NULL }
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};
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scrollbar_context = get_style (scrollbar_path, G_N_ELEMENTS (scrollbar_path));
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trough_context = get_style (trough_path, G_N_ELEMENTS (trough_path));
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slider_context = get_style (slider_path, G_N_ELEMENTS (slider_path));
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gtk_style_context_set_parent (slider_context, trough_context);
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gtk_style_context_set_parent (trough_context, scrollbar_context);
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gtk_style_context_set_state (scrollbar_context, state);
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gtk_style_context_set_state (trough_context, state);
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gtk_style_context_set_state (slider_context, state);
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gtk_render_background (trough_context, cr, x, y, width, height);
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gtk_render_frame (trough_context, cr, x, y, width, height);
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gtk_render_slider (slider_context, cr, x + position, y + 1, 30, height - 2, GTK_ORIENTATION_HORIZONTAL);
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g_object_unref (slider_context);
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g_object_unref (trough_context);
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g_object_unref (scrollbar_context);
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}
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static gboolean
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draw_cb (GtkWidget *widget,
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cairo_t *cr)
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{
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gint width;
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width = gtk_widget_get_allocated_width (widget);
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draw_horizontal_scrollbar (widget, cr, 10, 10, width - 20, 10, 30, GTK_STATE_FLAG_NORMAL);
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draw_horizontal_scrollbar (widget, cr, 10, 30, width - 20, 10, 40, GTK_STATE_FLAG_PRELIGHT);
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draw_horizontal_scrollbar (widget, cr, 10, 50, width - 20, 10, 50, GTK_STATE_FLAG_ACTIVE|GTK_STATE_FLAG_PRELIGHT);
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return FALSE;
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}
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int
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main (int argc, char *argv[])
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{
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GtkWidget *window;
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GtkWidget *box;
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GtkWidget *da;
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gtk_init (NULL, NULL);
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_widget_set_app_paintable (window, TRUE);
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box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
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gtk_container_add (GTK_CONTAINER (window), box);
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da = gtk_drawing_area_new ();
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gtk_widget_set_size_request (da, 200, 200);
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gtk_widget_set_app_paintable (da, TRUE);
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gtk_container_add (GTK_CONTAINER (box), da);
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g_signal_connect (da, "draw", G_CALLBACK (draw_cb), NULL);
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gtk_widget_show_all (window);
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gtk_main ();
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return 0;
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}
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