Commit a06858cc authored by Matthias Clasen's avatar Matthias Clasen
Browse files

Add a custom input test

This shows the minimal work required to hook up an
im context to a custom widget.
parent c6c48d32
/* Demonstrates hooking up an input method context to a custom widget.
*/
#include <gtk/gtk.h>
G_DECLARE_FINAL_TYPE (DemoWidget, demo_widget, DEMO, WIDGET, GtkWidget)
struct _DemoWidget
{
GtkWidget parent_instance;
GtkIMContext *im_context;
PangoLayout *layout;
};
struct _DemoWidgetClass
{
GtkWidgetClass parent_class;
};
G_DEFINE_TYPE (DemoWidget, demo_widget, GTK_TYPE_WIDGET)
static void
commit_cb (GtkIMContext *context,
const char *str,
DemoWidget *demo)
{
pango_layout_set_text (demo->layout, str, -1);
pango_layout_set_attributes (demo->layout, NULL);
gtk_widget_queue_draw (GTK_WIDGET (demo));
}
static void
preedit_changed_cb (GtkIMContext *context,
DemoWidget *demo)
{
char *str;
PangoAttrList *attrs;
int cursor_pos;
gtk_im_context_get_preedit_string (context, &str, &attrs, &cursor_pos);
pango_layout_set_text (demo->layout, str, -1);
pango_layout_set_attributes (demo->layout, attrs);
g_free (str);
pango_attr_list_unref (attrs);
gtk_widget_queue_draw (GTK_WIDGET (demo));
}
static gboolean
key_pressed_cb (GtkEventControllerKey *controller,
guint keyval,
guint keycode,
GdkModifierType state,
DemoWidget *demo)
{
if (keyval == GDK_KEY_BackSpace)
{
pango_layout_set_text (demo->layout, "", -1);
pango_layout_set_attributes (demo->layout, NULL);
gtk_widget_queue_draw (GTK_WIDGET (demo));
return TRUE;
}
return FALSE;
}
static void
demo_widget_init (DemoWidget *demo)
{
GtkEventController *controller;
gtk_widget_set_focusable (GTK_WIDGET (demo), TRUE);
demo->layout = gtk_widget_create_pango_layout (GTK_WIDGET (demo), "");
demo->im_context = gtk_im_multicontext_new ();
g_signal_connect (demo->im_context, "commit", G_CALLBACK (commit_cb), demo);
g_signal_connect (demo->im_context, "preedit-changed", G_CALLBACK (preedit_changed_cb), demo);
controller = gtk_event_controller_key_new ();
gtk_event_controller_key_set_im_context (GTK_EVENT_CONTROLLER_KEY (controller),
demo->im_context);
g_signal_connect (controller, "key-pressed", G_CALLBACK (key_pressed_cb), demo);
gtk_widget_add_controller (GTK_WIDGET (demo), controller);
}
static void
demo_widget_dispose (GObject *object)
{
DemoWidget *demo = DEMO_WIDGET (object);
g_clear_object (&demo->layout);
g_clear_object (&demo->im_context);
G_OBJECT_CLASS (demo_widget_parent_class)->dispose (object);
}
static void
demo_widget_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
DemoWidget *demo = DEMO_WIDGET (widget);
gtk_snapshot_render_layout (snapshot,
gtk_widget_get_style_context (widget),
0, 0,
demo->layout);
}
static void
demo_widget_class_init (DemoWidgetClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
object_class->dispose = demo_widget_dispose;
widget_class->snapshot = demo_widget_snapshot;
}
static GtkWidget *
demo_widget_new (void)
{
return g_object_new (demo_widget_get_type (), NULL);
}
int
main (int argc, char *argv[])
{
GtkWindow *window;
GtkWidget *demo;
gtk_init ();
window = GTK_WINDOW (gtk_window_new ());
demo = demo_widget_new ();
gtk_window_set_child (window, demo);
gtk_window_present (window);
gtk_widget_grab_focus (demo);
while (g_list_model_get_n_items (gtk_window_get_toplevels ()) > 0)
g_main_context_iteration (NULL, TRUE);
return 0;
}
gtk_tests = [
# testname, optional extra sources
['input'],
['testpopup'],
['testupload'],
['testtransform'],
......
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