609e04ddcf
Clean up the code of many examples in minor ways, fix some memory leaks, and avoid the use of dialogs where a regular toplevel works just as well.
162 lines
5.0 KiB
C
162 lines
5.0 KiB
C
/* Cursors
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*
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* Demonstrates a useful set of available cursors.
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*/
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#include <gtk/gtk.h>
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static void
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set_cursor (GtkWidget *button, gpointer data)
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{
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GtkWidget *toplevel;
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GdkCursor *cursor = data;
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GdkWindow *window;
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toplevel = gtk_widget_get_toplevel (button);
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window = gtk_widget_get_window (toplevel);
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gdk_window_set_cursor (window, cursor);
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}
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static GtkWidget *
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add_section (GtkWidget *box,
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const gchar *heading)
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{
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GtkWidget *label;
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GtkWidget *section;
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label = gtk_label_new (heading);
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gtk_label_set_xalign (GTK_LABEL (label), 0.0);
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gtk_widget_set_margin_top (label, 10);
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gtk_widget_set_margin_bottom (label, 10);
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gtk_box_pack_start (GTK_BOX (box), label, FALSE, TRUE, 0);
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section = gtk_flow_box_new ();
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gtk_widget_set_halign (section, GTK_ALIGN_START);
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gtk_flow_box_set_selection_mode (GTK_FLOW_BOX (section), GTK_SELECTION_NONE);
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gtk_flow_box_set_min_children_per_line (GTK_FLOW_BOX (section), 2);
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gtk_flow_box_set_max_children_per_line (GTK_FLOW_BOX (section), 20);
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gtk_box_pack_start (GTK_BOX (box), section, FALSE, TRUE, 0);
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return section;
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}
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static void
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add_button (GtkWidget *section,
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const gchar *css_name)
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{
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GtkWidget *image, *button;
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GdkDisplay *display;
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GdkCursor *cursor;
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display = gtk_widget_get_display (section);
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cursor = gdk_cursor_new_from_name (display, css_name);
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if (cursor == NULL)
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image = gtk_image_new_from_icon_name ("image-missing", GTK_ICON_SIZE_MENU);
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else
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{
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gchar *path;
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path = g_strdup_printf ("/cursors/%s_cursor.png", css_name);
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g_strdelimit (path, "-", '_');
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image = gtk_image_new_from_resource (path);
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g_free (path);
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}
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gtk_widget_set_size_request (image, 32, 32);
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button = gtk_button_new ();
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gtk_container_add (GTK_CONTAINER (button), image);
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gtk_style_context_add_class (gtk_widget_get_style_context (button), "image-button");
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g_signal_connect (button, "clicked", G_CALLBACK (set_cursor), cursor);
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gtk_widget_set_tooltip_text (button, css_name);
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gtk_container_add (GTK_CONTAINER (section), button);
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}
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GtkWidget *
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do_cursors (GtkWidget *do_widget)
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{
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static GtkWidget *window = NULL;
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if (!window)
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{
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GtkWidget *sw;
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GtkWidget *box;
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GtkWidget *section;
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_window_set_screen (GTK_WINDOW (window),
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gtk_widget_get_screen (do_widget));
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gtk_window_set_title (GTK_WINDOW (window), "Cursors");
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gtk_window_set_default_size (GTK_WINDOW (window), 500, 500);
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g_signal_connect (window, "destroy",
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G_CALLBACK (gtk_widget_destroyed),
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&window);
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sw = gtk_scrolled_window_new (NULL, NULL);
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gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
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GTK_POLICY_NEVER,
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GTK_POLICY_AUTOMATIC);
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gtk_container_add (GTK_CONTAINER (window), sw);
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box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
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g_object_set (box,
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"margin-start", 20,
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"margin-end", 20,
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"margin-bottom", 10,
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NULL);
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gtk_container_add (GTK_CONTAINER (sw), box);
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section = add_section (box, "General");
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add_button (section, "default");
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add_button (section, "none");
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section = add_section (box, "Link & Status");
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add_button (section, "context-menu");
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add_button (section, "help");
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add_button (section, "pointer");
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add_button (section, "progress");
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add_button (section, "wait");
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section = add_section (box, "Selection");
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add_button (section, "cell");
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add_button (section, "crosshair");
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add_button (section, "text");
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add_button (section, "vertical-text");
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section = add_section (box, "Drag & Drop");
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add_button (section, "alias");
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add_button (section, "copy");
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add_button (section, "move");
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add_button (section, "no-drop");
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add_button (section, "not-allowed");
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add_button (section, "grab");
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add_button (section, "grabbing");
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section = add_section (box, "Resize & Scrolling");
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add_button (section, "all-scroll");
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add_button (section, "col-resize");
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add_button (section, "row-resize");
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add_button (section, "n-resize");
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add_button (section, "e-resize");
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add_button (section, "s-resize");
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add_button (section, "w-resize");
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add_button (section, "ne-resize");
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add_button (section, "nw-resize");
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add_button (section, "se-resize");
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add_button (section, "sw-resize");
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add_button (section, "ew-resize");
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add_button (section, "ns-resize");
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add_button (section, "nesw-resize");
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add_button (section, "nwse-resize");
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section = add_section (box, "Zoom");
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add_button (section, "zoom-in");
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add_button (section, "zoom-out");
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}
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if (!gtk_widget_get_visible (window))
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gtk_widget_show_all (window);
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else
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gtk_widget_destroy (window);
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return window;
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}
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