gtk/demos/gtk-demo/colorsel.c
Matthias Clasen a66147dc82 gtk-demo: fix colorchooser example
A nested dialog on top of a modal dialog must itself be modal,
otherwise it doesn't get any input.
2013-12-03 23:30:52 -05:00

135 lines
3.4 KiB
C

/* Color Chooser
*
* A GtkColorChooser lets the user choose a color. There are several
* implementations of the GtkColorChooser interface in GTK+. The
* GtkColorChooserDialog is a prebuilt dialog containing a
* GtkColorChooserWidget.
*/
#include <gtk/gtk.h>
static GtkWidget *window = NULL;
static GtkWidget *da;
static GdkRGBA color;
static GtkWidget *frame;
/* draw callback for the drawing area
*/
static gboolean
draw_callback (GtkWidget *widget,
cairo_t *cr,
gpointer data)
{
GtkStyleContext *context;
GdkRGBA rgba;
context = gtk_widget_get_style_context (widget);
gtk_style_context_get_background_color (context, GTK_STATE_FLAG_NORMAL, &rgba);
gdk_cairo_set_source_rgba (cr, &rgba);
cairo_paint (cr);
return TRUE;
}
static void
response_cb (GtkDialog *dialog,
gint response_id,
gpointer user_data)
{
if (response_id == GTK_RESPONSE_OK)
{
gtk_color_chooser_get_rgba (GTK_COLOR_CHOOSER (dialog), &color);
gtk_widget_override_background_color (da, 0, &color);
}
gtk_widget_hide (GTK_WIDGET (dialog));
}
static void
change_color_callback (GtkWidget *button,
gpointer data)
{
GtkWidget *dialog;
dialog = gtk_color_chooser_dialog_new ("Changing color", GTK_WINDOW (window));
gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (dialog), &color);
g_signal_connect (dialog,
"response",
G_CALLBACK (response_cb),
NULL);
gtk_widget_show_all (dialog);
}
GtkWidget *
do_colorsel (GtkWidget *do_widget)
{
GtkWidget *vbox;
GtkWidget *button;
if (!window)
{
color.red = 0;
color.blue = 1;
color.green = 0;
color.alpha = 1;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_screen (GTK_WINDOW (window),
gtk_widget_get_screen (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Color Chooser");
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
gtk_container_set_border_width (GTK_CONTAINER (window), 8);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 8);
gtk_container_add (GTK_CONTAINER (window), vbox);
/*
* Create the color swatch area
*/
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
da = gtk_drawing_area_new ();
g_signal_connect (da, "draw", G_CALLBACK (draw_callback), NULL);
/* set a minimum size */
gtk_widget_set_size_request (da, 200, 200);
/* set the color */
gtk_widget_override_background_color (da, 0, &color);
gtk_container_add (GTK_CONTAINER (frame), da);
button = gtk_button_new_with_mnemonic ("_Change the above color");
gtk_widget_set_halign (button, GTK_ALIGN_END);
gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
g_signal_connect (button, "clicked",
G_CALLBACK (change_color_callback), NULL);
}
if (!gtk_widget_get_visible (window))
{
gtk_widget_show_all (window);
}
else
{
gtk_widget_destroy (window);
window = NULL;
}
return window;
}