mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
/* Color Selector
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*
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* GtkColorSelection lets the user choose a color. GtkColorSelectionDialog is
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* a prebuilt dialog containing a GtkColorSelection.
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*
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*/
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#include <gtk/gtk.h>
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static GtkWidget *window = NULL;
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static GtkWidget *da;
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static GdkColor color;
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static GtkWidget *frame;
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/* Expose callback for the drawing area
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*/
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static gboolean
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expose_event_callback (GtkWidget *widget,
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GdkEventExpose *event,
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gpointer data)
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{
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if (widget->window)
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{
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GtkStyle *style;
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cairo_t *cr;
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style = gtk_widget_get_style (widget);
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cr = gdk_cairo_create (widget->window);
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gdk_cairo_set_source_color (cr, &style->bg[GTK_STATE_NORMAL]);
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gdk_cairo_rectangle (cr, &event->area);
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cairo_fill (cr);
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cairo_destroy (cr);
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}
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return TRUE;
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}
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static void
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change_color_callback (GtkWidget *button,
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gpointer data)
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{
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GtkWidget *dialog;
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GtkColorSelection *colorsel;
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gint response;
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dialog = gtk_color_selection_dialog_new ("Changing color");
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gtk_window_set_transient_for (GTK_WINDOW (dialog), GTK_WINDOW (window));
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colorsel = GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (dialog)->colorsel);
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gtk_color_selection_set_previous_color (colorsel, &color);
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gtk_color_selection_set_current_color (colorsel, &color);
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gtk_color_selection_set_has_palette (colorsel, TRUE);
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response = gtk_dialog_run (GTK_DIALOG (dialog));
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if (response == GTK_RESPONSE_OK)
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{
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gtk_color_selection_get_current_color (colorsel,
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&color);
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gtk_widget_modify_bg (da, GTK_STATE_NORMAL, &color);
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}
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gtk_widget_destroy (dialog);
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}
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GtkWidget *
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do_colorsel (GtkWidget *do_widget)
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{
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GtkWidget *vbox;
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GtkWidget *button;
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GtkWidget *alignment;
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if (!window)
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{
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color.red = 0;
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color.blue = 65535;
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color.green = 0;
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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), "Color Selection");
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g_signal_connect (window, "destroy",
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G_CALLBACK (gtk_widget_destroyed), &window);
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gtk_container_set_border_width (GTK_CONTAINER (window), 8);
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vbox = gtk_vbox_new (FALSE, 8);
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gtk_container_set_border_width (GTK_CONTAINER (vbox), 8);
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gtk_container_add (GTK_CONTAINER (window), vbox);
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/*
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* Create the color swatch area
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*/
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frame = gtk_frame_new (NULL);
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gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
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gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
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da = gtk_drawing_area_new ();
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g_signal_connect (da, "expose_event",
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G_CALLBACK (expose_event_callback), NULL);
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/* set a minimum size */
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gtk_widget_set_size_request (da, 200, 200);
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/* set the color */
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gtk_widget_modify_bg (da, GTK_STATE_NORMAL, &color);
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gtk_container_add (GTK_CONTAINER (frame), da);
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alignment = gtk_alignment_new (1.0, 0.5, 0.0, 0.0);
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button = gtk_button_new_with_mnemonic ("_Change the above color");
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gtk_container_add (GTK_CONTAINER (alignment), button);
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gtk_box_pack_start (GTK_BOX (vbox), alignment, FALSE, FALSE, 0);
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g_signal_connect (button, "clicked",
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G_CALLBACK (change_color_callback), NULL);
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}
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if (!gtk_widget_get_visible (window))
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{
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gtk_widget_show_all (window);
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}
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else
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{
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gtk_widget_destroy (window);
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window = NULL;
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}
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return window;
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}
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