gtk/tests/testwidgetfocus.c
2020-07-25 00:47:36 +02:00

308 lines
8.3 KiB
C
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#include <gtk/gtk.h>
typedef struct _GtkFocusWidget GtkFocusWidget;
typedef struct _GtkFocusWidgetClass GtkFocusWidgetClass;
#define GTK_TYPE_FOCUS_WIDGET (gtk_focus_widget_get_type ())
#define GTK_FOCUS_WIDGET(obj) (G_TYPE_CHECK_INSTANCE_CAST(obj, GTK_TYPE_FOCUS_WIDGET, GtkFocusWidget))
#define GTK_FOCUS_WIDGET_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST(cls, GTK_TYPE_FOCUS_WIDGET, GtkFocusWidgetClass))
#define GTK_IS_FOCUS_WIDGET(obj) (G_TYPE_CHECK_INSTANCE_TYPE(obj, GTK_TYPE_FOCUS_WIDGET))
#define GTK_IS_FOCUS_WIDGET_CLASS(cls) (G_TYPE_CHECK_CLASS_TYPE(cls, GTK_TYPE_FOCUS_WIDGET))
#define GTK_FOCUS_WIDGET_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS(obj, GTK_TYPE_FOCUS_WIDGET, GtkFocusWidgetClass))
const char *css =
"* {"
" transition: none; "
"}"
"focuswidget {"
" padding: 30px;"
" font-size: 70%;"
"}"
"focuswidget button:nth-child(1) {"
" margin-right: 15px;"
" margin-bottom: 15px;"
"}"
"focuswidget button:nth-child(2) {"
" margin-left: 15px;"
" margin-bottom: 15px;"
"}"
"focuswidget button:nth-child(3) {"
" margin-right: 15px;"
" margin-top: 15px;"
"}"
"focuswidget button:nth-child(4) {"
" margin-left: 15px;"
" margin-top: 15px;"
"}"
"focuswidget button {"
" min-width: 80px;"
" min-height: 80px;"
" margin: 0px;"
" border: 5px solid green;"
" border-radius: 0px;"
" padding: 10px;"
" background-image: none;"
" background-color: white;"
" box-shadow: none;"
"}"
"focuswidget button:focus-visible {"
" outline-width: 4px;"
" outline-color: yellow;"
"}"
"focuswidget button:hover {"
" background-color: black;"
" color: white;"
"}"
"focuswidget button label:hover {"
" background-color: green;"
"}"
;
struct _GtkFocusWidget
{
GtkWidget parent_instance;
double mouse_x;
double mouse_y;
union {
struct {
GtkWidget *child1;
GtkWidget *child2;
GtkWidget *child3;
GtkWidget *child4;
};
GtkWidget* children[4];
};
};
struct _GtkFocusWidgetClass
{
GtkWidgetClass parent_class;
};
GType gtk_focus_widget_get_type (void) G_GNUC_CONST;
G_DEFINE_TYPE(GtkFocusWidget, gtk_focus_widget, GTK_TYPE_WIDGET)
static void
gtk_focus_widget_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline)
{
GtkFocusWidget *self = GTK_FOCUS_WIDGET (widget);
int child_width = width / 2;
int child_height = height / 2;
GtkAllocation child_alloc;
child_alloc.x = 0;
child_alloc.y = 0;
child_alloc.width = child_width;
child_alloc.height = child_height;
gtk_widget_size_allocate (self->child1, &child_alloc, -1);
child_alloc.x += child_width;
gtk_widget_size_allocate (self->child2, &child_alloc, -1);
child_alloc.y += child_height;
gtk_widget_size_allocate (self->child4, &child_alloc, -1);
child_alloc.x -= child_width;
gtk_widget_size_allocate (self->child3, &child_alloc, -1);
}
static void
gtk_focus_widget_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkFocusWidget *self = GTK_FOCUS_WIDGET (widget);
int min, nat;
int i;
*minimum = 0;
*natural = 0;
for (i = 0; i < 4; i ++)
{
gtk_widget_measure (self->children[i], orientation, for_size,
&min, &nat, NULL, NULL);
*minimum = MAX (*minimum, min);
*natural = MAX (*natural, nat);
}
*minimum *= 2;
*natural *= 2;
}
static void
gtk_focus_widget_snapshot (GtkWidget *widget, GtkSnapshot *snapshot)
{
GtkFocusWidget *self = GTK_FOCUS_WIDGET (widget);
gtk_widget_snapshot_child (widget, self->child1, snapshot);
gtk_widget_snapshot_child (widget, self->child2, snapshot);
gtk_widget_snapshot_child (widget, self->child3, snapshot);
gtk_widget_snapshot_child (widget, self->child4, snapshot);
if (self->mouse_x != G_MININT && self->mouse_y != G_MININT)
{
PangoLayout *layout;
char *text;
GtkAllocation alloc;
graphene_rect_t bounds;
GdkRGBA black = {0, 0, 0, 1};
gtk_widget_get_allocation (widget, &alloc);
/* Since event coordinates and drawing is supposed to happen in the
* same coordinates space, this should all work out just fine. */
bounds.origin.x = self->mouse_x;
bounds.origin.y = -30;
bounds.size.width = 1;
bounds.size.height = alloc.height;
gtk_snapshot_append_color (snapshot,
&black,
&bounds);
bounds.origin.x = -30;
bounds.origin.y = self->mouse_y;
bounds.size.width = alloc.width;
bounds.size.height = 1;
gtk_snapshot_append_color (snapshot,
&black,
&bounds);
layout = gtk_widget_create_pango_layout (widget, NULL);
text = g_strdup_printf ("%.2f×%.2f", self->mouse_x, self->mouse_y);
pango_layout_set_text (layout, text, -1);
gtk_snapshot_render_layout (snapshot,
gtk_widget_get_style_context (widget),
self->mouse_x + 2,
self->mouse_y - 15, /* *shrug* */
layout);
g_free (text);
g_object_unref (layout);
}
}
static void
motion_cb (GtkEventControllerMotion *controller,
double x,
double y,
GtkWidget *widget)
{
GtkFocusWidget *self = GTK_FOCUS_WIDGET (widget);
self->mouse_x = x;
self->mouse_y = y;
gtk_widget_queue_draw (widget);
}
static void
gtk_focus_widget_finalize (GObject *object)
{
GtkFocusWidget *self = GTK_FOCUS_WIDGET (object);
gtk_widget_unparent (self->child1);
gtk_widget_unparent (self->child2);
gtk_widget_unparent (self->child3);
gtk_widget_unparent (self->child4);
G_OBJECT_CLASS (gtk_focus_widget_parent_class)->finalize (object);
}
static void
gtk_focus_widget_init (GtkFocusWidget *self)
{
GtkEventController *controller;
self->child1 = gtk_button_new_with_label ("1");
gtk_widget_set_parent (self->child1, GTK_WIDGET (self));
self->child2 = gtk_button_new_with_label ("2");
gtk_widget_set_parent (self->child2, GTK_WIDGET (self));
self->child3 = gtk_button_new_with_label ("3");
gtk_widget_set_parent (self->child3, GTK_WIDGET (self));
self->child4 = gtk_button_new_with_label ("4");
gtk_widget_set_parent (self->child4, GTK_WIDGET (self));
self->mouse_x = G_MININT;
self->mouse_y = G_MININT;
controller = gtk_event_controller_motion_new ();
g_signal_connect (controller, "motion",
G_CALLBACK (motion_cb), self);
gtk_widget_add_controller (GTK_WIDGET (self), controller);
}
static void
gtk_focus_widget_class_init (GtkFocusWidgetClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->finalize = gtk_focus_widget_finalize;
widget_class->snapshot = gtk_focus_widget_snapshot;
widget_class->measure = gtk_focus_widget_measure;
widget_class->size_allocate = gtk_focus_widget_size_allocate;
gtk_widget_class_set_css_name (widget_class, "focuswidget");
}
static void
quit_cb (GtkWidget *widget,
gpointer user_data)
{
gboolean *is_done = user_data;
*is_done = TRUE;
g_main_context_wakeup (NULL);
}
int
main(int argc, char **argv)
{
GtkWidget *window;
GtkWidget *widget;
GtkCssProvider *provider;
gboolean done = FALSE;
gtk_init ();
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_data (provider, css, -1);
gtk_style_context_add_provider_for_display (gdk_display_get_default (),
GTK_STYLE_PROVIDER (provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
window = gtk_window_new ();
widget = g_object_new (GTK_TYPE_FOCUS_WIDGET, NULL);
gtk_window_set_decorated (GTK_WINDOW (window), FALSE);
gtk_window_set_child (GTK_WINDOW (window), widget);
g_signal_connect (window, "destroy", G_CALLBACK (quit_cb), &done);
gtk_widget_show (window);
while (!done)
g_main_context_iteration (NULL, TRUE);
}