mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-27 06:00:22 +00:00
700 lines
22 KiB
C
700 lines
22 KiB
C
/*
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* gtkoffscreenbox.c
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*/
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#include "config.h"
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#include <math.h>
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#include <gtk/gtk.h>
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#include "gtkoffscreenbox.h"
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static void gtk_offscreen_box_realize (GtkWidget *widget);
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static void gtk_offscreen_box_unrealize (GtkWidget *widget);
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static void gtk_offscreen_box_get_preferred_width (GtkWidget *widget,
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gint *minimum,
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gint *natural);
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static void gtk_offscreen_box_get_preferred_height (GtkWidget *widget,
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gint *minimum,
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gint *natural);
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static void gtk_offscreen_box_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gboolean gtk_offscreen_box_damage (GtkWidget *widget,
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GdkEventExpose *event);
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static gboolean gtk_offscreen_box_draw (GtkWidget *widget,
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cairo_t *cr);
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static void gtk_offscreen_box_add (GtkContainer *container,
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GtkWidget *child);
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static void gtk_offscreen_box_remove (GtkContainer *container,
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GtkWidget *widget);
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static void gtk_offscreen_box_forall (GtkContainer *container,
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gboolean include_internals,
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GtkCallback callback,
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gpointer callback_data);
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static GType gtk_offscreen_box_child_type (GtkContainer *container);
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#define CHILD1_SIZE_SCALE 1.0
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#define CHILD2_SIZE_SCALE 1.0
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G_DEFINE_TYPE (GtkOffscreenBox, gtk_offscreen_box, GTK_TYPE_CONTAINER);
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static void
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to_child_2 (GtkOffscreenBox *offscreen_box,
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double widget_x, double widget_y,
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double *x_out, double *y_out)
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{
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GtkAllocation child_area;
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double x, y, xr, yr;
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double cos_angle, sin_angle;
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x = widget_x;
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y = widget_y;
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if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
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{
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gtk_widget_get_allocation (offscreen_box->child1, &child_area);
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y -= child_area.height;
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}
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gtk_widget_get_allocation (offscreen_box->child2, &child_area);
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x -= child_area.width / 2;
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y -= child_area.height / 2;
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cos_angle = cos (-offscreen_box->angle);
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sin_angle = sin (-offscreen_box->angle);
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xr = x * cos_angle - y * sin_angle;
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yr = x * sin_angle + y * cos_angle;
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x = xr;
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y = yr;
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x += child_area.width / 2;
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y += child_area.height / 2;
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*x_out = x;
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*y_out = y;
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}
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static void
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to_parent_2 (GtkOffscreenBox *offscreen_box,
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double offscreen_x, double offscreen_y,
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double *x_out, double *y_out)
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{
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GtkAllocation child_area;
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double x, y, xr, yr;
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double cos_angle, sin_angle;
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gtk_widget_get_allocation (offscreen_box->child2, &child_area);
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x = offscreen_x;
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y = offscreen_y;
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x -= child_area.width / 2;
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y -= child_area.height / 2;
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cos_angle = cos (offscreen_box->angle);
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sin_angle = sin (offscreen_box->angle);
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xr = x * cos_angle - y * sin_angle;
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yr = x * sin_angle + y * cos_angle;
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x = xr;
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y = yr;
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x += child_area.width / 2;
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y += child_area.height / 2;
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if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
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{
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gtk_widget_get_allocation (offscreen_box->child1, &child_area);
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y += child_area.height;
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}
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*x_out = x;
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*y_out = y;
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}
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static void
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gtk_offscreen_box_class_init (GtkOffscreenBoxClass *klass)
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{
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
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widget_class->realize = gtk_offscreen_box_realize;
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widget_class->unrealize = gtk_offscreen_box_unrealize;
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widget_class->get_preferred_width = gtk_offscreen_box_get_preferred_width;
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widget_class->get_preferred_height = gtk_offscreen_box_get_preferred_height;
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widget_class->size_allocate = gtk_offscreen_box_size_allocate;
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widget_class->draw = gtk_offscreen_box_draw;
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g_signal_override_class_closure (g_signal_lookup ("damage-event", GTK_TYPE_WIDGET),
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GTK_TYPE_OFFSCREEN_BOX,
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g_cclosure_new (G_CALLBACK (gtk_offscreen_box_damage),
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NULL, NULL));
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container_class->add = gtk_offscreen_box_add;
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container_class->remove = gtk_offscreen_box_remove;
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container_class->forall = gtk_offscreen_box_forall;
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container_class->child_type = gtk_offscreen_box_child_type;
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}
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static void
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gtk_offscreen_box_init (GtkOffscreenBox *offscreen_box)
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{
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gtk_widget_set_has_window (GTK_WIDGET (offscreen_box), TRUE);
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}
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GtkWidget *
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gtk_offscreen_box_new (void)
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{
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return g_object_new (GTK_TYPE_OFFSCREEN_BOX, NULL);
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}
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static GdkWindow *
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pick_offscreen_child (GdkWindow *offscreen_window,
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double widget_x, double widget_y,
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GtkOffscreenBox *offscreen_box)
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{
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GtkAllocation child_area;
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double x, y;
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/* First check for child 2 */
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if (offscreen_box->child2 &&
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gtk_widget_get_visible (offscreen_box->child2))
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{
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to_child_2 (offscreen_box,
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widget_x, widget_y,
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&x, &y);
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gtk_widget_get_allocation (offscreen_box->child2, &child_area);
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if (x >= 0 && x < child_area.width &&
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y >= 0 && y < child_area.height)
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return offscreen_box->offscreen_window2;
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}
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if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
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{
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x = widget_x;
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y = widget_y;
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gtk_widget_get_allocation (offscreen_box->child1, &child_area);
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if (x >= 0 && x < child_area.width &&
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y >= 0 && y < child_area.height)
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return offscreen_box->offscreen_window1;
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}
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return NULL;
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}
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static void
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offscreen_window_to_parent1 (GdkWindow *offscreen_window,
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double offscreen_x,
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double offscreen_y,
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double *parent_x,
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double *parent_y,
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GtkOffscreenBox *offscreen_box)
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{
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*parent_x = offscreen_x;
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*parent_y = offscreen_y;
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}
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static void
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offscreen_window_from_parent1 (GdkWindow *window,
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double parent_x,
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double parent_y,
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double *offscreen_x,
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double *offscreen_y,
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GtkOffscreenBox *offscreen_box)
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{
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*offscreen_x = parent_x;
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*offscreen_y = parent_y;
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}
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static void
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offscreen_window_to_parent2 (GdkWindow *offscreen_window,
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double offscreen_x,
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double offscreen_y,
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double *parent_x,
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double *parent_y,
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GtkOffscreenBox *offscreen_box)
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{
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to_parent_2 (offscreen_box,
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offscreen_x, offscreen_y,
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parent_x, parent_y);
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}
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static void
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offscreen_window_from_parent2 (GdkWindow *window,
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double parent_x,
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double parent_y,
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double *offscreen_x,
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double *offscreen_y,
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GtkOffscreenBox *offscreen_box)
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{
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to_child_2 (offscreen_box,
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parent_x, parent_y,
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offscreen_x, offscreen_y);
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}
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static cairo_surface_t *
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gdk_offscreen_box_create_alpha_image_surface (GdkWindow *offscreen,
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gint width,
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gint height)
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{
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return cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
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}
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static void
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gtk_offscreen_box_realize (GtkWidget *widget)
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{
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GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (widget);
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GtkAllocation allocation, child_area;
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GtkStyleContext *context;
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GdkWindow *window;
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GdkWindowAttr attributes;
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gint attributes_mask;
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guint border_width;
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GtkRequisition child_requisition;
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int start_y = 0;
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gtk_widget_set_realized (widget, TRUE);
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border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
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gtk_widget_get_allocation (widget, &allocation);
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attributes.x = allocation.x + border_width;
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attributes.y = allocation.y + border_width;
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attributes.width = allocation.width - 2 * border_width;
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attributes.height = allocation.height - 2 * border_width;
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attributes.window_type = GDK_WINDOW_CHILD;
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attributes.event_mask = gtk_widget_get_events (widget)
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| GDK_EXPOSURE_MASK
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| GDK_POINTER_MOTION_MASK
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| GDK_BUTTON_PRESS_MASK
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| GDK_BUTTON_RELEASE_MASK
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| GDK_SCROLL_MASK
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| GDK_ENTER_NOTIFY_MASK
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| GDK_LEAVE_NOTIFY_MASK;
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attributes.visual = gtk_widget_get_visual (widget);
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attributes.wclass = GDK_INPUT_OUTPUT;
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attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
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window = gdk_window_new (gtk_widget_get_parent_window (widget),
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&attributes, attributes_mask);
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gtk_widget_set_window (widget, window);
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gdk_window_set_user_data (window, widget);
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g_signal_connect (window, "pick-embedded-child",
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G_CALLBACK (pick_offscreen_child), offscreen_box);
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attributes.window_type = GDK_WINDOW_OFFSCREEN;
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/* Child 1 */
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attributes.x = attributes.y = 0;
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if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
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{
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gtk_widget_get_allocation (offscreen_box->child1, &child_area);
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attributes.width = child_area.width;
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attributes.height = child_area.height;
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start_y += child_area.height;
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}
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offscreen_box->offscreen_window1 = gdk_window_new (gdk_screen_get_root_window (gtk_widget_get_screen (widget)),
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&attributes, attributes_mask);
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gdk_window_set_user_data (offscreen_box->offscreen_window1, widget);
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if (offscreen_box->child1)
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gtk_widget_set_parent_window (offscreen_box->child1, offscreen_box->offscreen_window1);
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gdk_offscreen_window_set_embedder (offscreen_box->offscreen_window1,
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window);
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g_signal_connect (offscreen_box->offscreen_window1, "to-embedder",
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G_CALLBACK (offscreen_window_to_parent1), offscreen_box);
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g_signal_connect (offscreen_box->offscreen_window1, "from-embedder",
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G_CALLBACK (offscreen_window_from_parent1), offscreen_box);
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/* Child 2 */
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attributes.y = start_y;
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child_requisition.width = child_requisition.height = 0;
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if (offscreen_box->child2 && gtk_widget_get_visible (offscreen_box->child2))
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{
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gtk_widget_get_allocation (offscreen_box->child2, &child_area);
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attributes.width = child_area.width;
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attributes.height = child_area.height;
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}
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offscreen_box->offscreen_window2 = gdk_window_new (gdk_screen_get_root_window (gtk_widget_get_screen (widget)),
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&attributes, attributes_mask);
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gdk_window_set_user_data (offscreen_box->offscreen_window2, widget);
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if (offscreen_box->child2)
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gtk_widget_set_parent_window (offscreen_box->child2, offscreen_box->offscreen_window2);
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gdk_offscreen_window_set_embedder (offscreen_box->offscreen_window2,
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window);
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g_signal_connect (offscreen_box->offscreen_window2, "create-surface",
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G_CALLBACK (gdk_offscreen_box_create_alpha_image_surface),
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offscreen_box);
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g_signal_connect (offscreen_box->offscreen_window2, "to-embedder",
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G_CALLBACK (offscreen_window_to_parent2), offscreen_box);
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g_signal_connect (offscreen_box->offscreen_window2, "from-embedder",
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G_CALLBACK (offscreen_window_from_parent2), offscreen_box);
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context = gtk_widget_get_style_context (widget);
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gtk_style_context_set_background (context, window);
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gtk_style_context_set_background (context, offscreen_box->offscreen_window1);
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gtk_style_context_set_background (context, offscreen_box->offscreen_window2);
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gdk_window_show (offscreen_box->offscreen_window1);
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gdk_window_show (offscreen_box->offscreen_window2);
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}
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static void
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gtk_offscreen_box_unrealize (GtkWidget *widget)
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{
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GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (widget);
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gdk_window_set_user_data (offscreen_box->offscreen_window1, NULL);
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gdk_window_destroy (offscreen_box->offscreen_window1);
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offscreen_box->offscreen_window1 = NULL;
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gdk_window_set_user_data (offscreen_box->offscreen_window2, NULL);
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gdk_window_destroy (offscreen_box->offscreen_window2);
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offscreen_box->offscreen_window2 = NULL;
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GTK_WIDGET_CLASS (gtk_offscreen_box_parent_class)->unrealize (widget);
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}
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static GType
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gtk_offscreen_box_child_type (GtkContainer *container)
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{
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GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (container);
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if (offscreen_box->child1 && offscreen_box->child2)
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return G_TYPE_NONE;
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return GTK_TYPE_WIDGET;
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}
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static void
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gtk_offscreen_box_add (GtkContainer *container,
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GtkWidget *widget)
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{
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GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (container);
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if (!offscreen_box->child1)
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gtk_offscreen_box_add1 (offscreen_box, widget);
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else if (!offscreen_box->child2)
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gtk_offscreen_box_add2 (offscreen_box, widget);
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else
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g_warning ("GtkOffscreenBox cannot have more than 2 children\n");
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}
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void
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gtk_offscreen_box_add1 (GtkOffscreenBox *offscreen_box,
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GtkWidget *child)
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{
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g_return_if_fail (GTK_IS_OFFSCREEN_BOX (offscreen_box));
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g_return_if_fail (GTK_IS_WIDGET (child));
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if (offscreen_box->child1 == NULL)
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{
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gtk_widget_set_parent_window (child, offscreen_box->offscreen_window1);
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gtk_widget_set_parent (child, GTK_WIDGET (offscreen_box));
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offscreen_box->child1 = child;
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}
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}
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void
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gtk_offscreen_box_add2 (GtkOffscreenBox *offscreen_box,
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GtkWidget *child)
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{
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g_return_if_fail (GTK_IS_OFFSCREEN_BOX (offscreen_box));
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g_return_if_fail (GTK_IS_WIDGET (child));
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if (offscreen_box->child2 == NULL)
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{
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gtk_widget_set_parent_window (child, offscreen_box->offscreen_window2);
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gtk_widget_set_parent (child, GTK_WIDGET (offscreen_box));
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offscreen_box->child2 = child;
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}
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}
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static void
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gtk_offscreen_box_remove (GtkContainer *container,
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GtkWidget *widget)
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{
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GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (container);
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gboolean was_visible;
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was_visible = gtk_widget_get_visible (widget);
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if (offscreen_box->child1 == widget)
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{
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gtk_widget_unparent (widget);
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offscreen_box->child1 = NULL;
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if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
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gtk_widget_queue_resize (GTK_WIDGET (container));
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}
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else if (offscreen_box->child2 == widget)
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{
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gtk_widget_unparent (widget);
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offscreen_box->child2 = NULL;
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if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
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gtk_widget_queue_resize (GTK_WIDGET (container));
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}
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}
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static void
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gtk_offscreen_box_forall (GtkContainer *container,
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gboolean include_internals,
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GtkCallback callback,
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gpointer callback_data)
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{
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GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (container);
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g_return_if_fail (callback != NULL);
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if (offscreen_box->child1)
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(*callback) (offscreen_box->child1, callback_data);
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if (offscreen_box->child2)
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(*callback) (offscreen_box->child2, callback_data);
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}
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void
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gtk_offscreen_box_set_angle (GtkOffscreenBox *offscreen_box,
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gdouble angle)
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{
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g_return_if_fail (GTK_IS_OFFSCREEN_BOX (offscreen_box));
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offscreen_box->angle = angle;
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gtk_widget_queue_draw (GTK_WIDGET (offscreen_box));
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/* TODO: Really needs to resent pointer events if over the rotated window */
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}
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static void
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gtk_offscreen_box_size_request (GtkWidget *widget,
|
|
GtkRequisition *requisition)
|
|
{
|
|
GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (widget);
|
|
int w, h;
|
|
guint border_width;
|
|
|
|
w = 0;
|
|
h = 0;
|
|
|
|
if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
|
|
{
|
|
GtkRequisition child_requisition;
|
|
|
|
gtk_widget_get_preferred_size ( (offscreen_box->child1),
|
|
&child_requisition, NULL);
|
|
|
|
w = MAX (w, CHILD1_SIZE_SCALE * child_requisition.width);
|
|
h += CHILD1_SIZE_SCALE * child_requisition.height;
|
|
}
|
|
|
|
if (offscreen_box->child2 && gtk_widget_get_visible (offscreen_box->child2))
|
|
{
|
|
GtkRequisition child_requisition;
|
|
|
|
gtk_widget_get_preferred_size ( (offscreen_box->child2),
|
|
&child_requisition, NULL);
|
|
|
|
w = MAX (w, CHILD2_SIZE_SCALE * child_requisition.width);
|
|
h += CHILD2_SIZE_SCALE * child_requisition.height;
|
|
}
|
|
|
|
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
|
|
requisition->width = border_width * 2 + w;
|
|
requisition->height = border_width * 2 + h;
|
|
}
|
|
|
|
static void
|
|
gtk_offscreen_box_get_preferred_width (GtkWidget *widget,
|
|
gint *minimum,
|
|
gint *natural)
|
|
{
|
|
GtkRequisition requisition;
|
|
|
|
gtk_offscreen_box_size_request (widget, &requisition);
|
|
|
|
*minimum = *natural = requisition.width;
|
|
}
|
|
|
|
static void
|
|
gtk_offscreen_box_get_preferred_height (GtkWidget *widget,
|
|
gint *minimum,
|
|
gint *natural)
|
|
{
|
|
GtkRequisition requisition;
|
|
|
|
gtk_offscreen_box_size_request (widget, &requisition);
|
|
|
|
*minimum = *natural = requisition.height;
|
|
}
|
|
|
|
static void
|
|
gtk_offscreen_box_size_allocate (GtkWidget *widget,
|
|
GtkAllocation *allocation)
|
|
{
|
|
GtkOffscreenBox *offscreen_box;
|
|
gint start_y;
|
|
guint border_width;
|
|
|
|
offscreen_box = GTK_OFFSCREEN_BOX (widget);
|
|
|
|
gtk_widget_set_allocation (widget, allocation);
|
|
|
|
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
|
|
|
|
if (gtk_widget_get_realized (widget))
|
|
gdk_window_move_resize (gtk_widget_get_window (widget),
|
|
allocation->x + border_width,
|
|
allocation->y + border_width,
|
|
allocation->width - border_width * 2,
|
|
allocation->height - border_width * 2);
|
|
|
|
start_y = 0;
|
|
|
|
if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
|
|
{
|
|
GtkRequisition child_requisition;
|
|
GtkAllocation child_allocation;
|
|
|
|
gtk_widget_get_preferred_size (offscreen_box->child1,
|
|
&child_requisition, NULL);
|
|
child_allocation.x = child_requisition.width * (CHILD1_SIZE_SCALE - 1.0) / 2;
|
|
child_allocation.y = start_y + child_requisition.height * (CHILD1_SIZE_SCALE - 1.0) / 2;
|
|
child_allocation.width = MAX (1, (gint) allocation->width - 2 * border_width);
|
|
child_allocation.height = child_requisition.height;
|
|
|
|
start_y += CHILD1_SIZE_SCALE * child_requisition.height;
|
|
|
|
if (gtk_widget_get_realized (widget))
|
|
gdk_window_move_resize (offscreen_box->offscreen_window1,
|
|
child_allocation.x,
|
|
child_allocation.y,
|
|
child_allocation.width,
|
|
child_allocation.height);
|
|
|
|
child_allocation.x = child_allocation.y = 0;
|
|
gtk_widget_size_allocate (offscreen_box->child1, &child_allocation);
|
|
}
|
|
|
|
if (offscreen_box->child2 && gtk_widget_get_visible (offscreen_box->child2))
|
|
{
|
|
GtkRequisition child_requisition;
|
|
GtkAllocation child_allocation;
|
|
|
|
gtk_widget_get_preferred_size (offscreen_box->child2,
|
|
&child_requisition, NULL);
|
|
child_allocation.x = child_requisition.width * (CHILD2_SIZE_SCALE - 1.0) / 2;
|
|
child_allocation.y = start_y + child_requisition.height * (CHILD2_SIZE_SCALE - 1.0) / 2;
|
|
child_allocation.width = MAX (1, (gint) allocation->width - 2 * border_width);
|
|
child_allocation.height = child_requisition.height;
|
|
|
|
start_y += CHILD2_SIZE_SCALE * child_requisition.height;
|
|
|
|
if (gtk_widget_get_realized (widget))
|
|
gdk_window_move_resize (offscreen_box->offscreen_window2,
|
|
child_allocation.x,
|
|
child_allocation.y,
|
|
child_allocation.width,
|
|
child_allocation.height);
|
|
|
|
child_allocation.x = child_allocation.y = 0;
|
|
gtk_widget_size_allocate (offscreen_box->child2, &child_allocation);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gtk_offscreen_box_damage (GtkWidget *widget,
|
|
GdkEventExpose *event)
|
|
{
|
|
gdk_window_invalidate_rect (gtk_widget_get_window (widget),
|
|
NULL, FALSE);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gtk_offscreen_box_draw (GtkWidget *widget,
|
|
cairo_t *cr)
|
|
{
|
|
GtkOffscreenBox *offscreen_box = GTK_OFFSCREEN_BOX (widget);
|
|
GdkWindow *window;
|
|
|
|
window = gtk_widget_get_window (widget);
|
|
if (gtk_cairo_should_draw_window (cr, window))
|
|
{
|
|
cairo_surface_t *surface;
|
|
GtkAllocation child_area;
|
|
|
|
if (offscreen_box->child1 && gtk_widget_get_visible (offscreen_box->child1))
|
|
{
|
|
surface = gdk_offscreen_window_get_surface (offscreen_box->offscreen_window1);
|
|
|
|
cairo_set_source_surface (cr, surface, 0, 0);
|
|
cairo_paint (cr);
|
|
|
|
gtk_widget_get_allocation (offscreen_box->child1, &child_area);
|
|
cairo_translate (cr, 0, child_area.height);
|
|
}
|
|
|
|
if (offscreen_box->child2 && gtk_widget_get_visible (offscreen_box->child2))
|
|
{
|
|
surface = gdk_offscreen_window_get_surface (offscreen_box->offscreen_window2);
|
|
|
|
gtk_widget_get_allocation (offscreen_box->child2, &child_area);
|
|
|
|
/* transform */
|
|
cairo_translate (cr, child_area.width / 2, child_area.height / 2);
|
|
cairo_rotate (cr, offscreen_box->angle);
|
|
cairo_translate (cr, -child_area.width / 2, -child_area.height / 2);
|
|
|
|
/* paint */
|
|
cairo_set_source_surface (cr, surface, 0, 0);
|
|
cairo_paint (cr);
|
|
}
|
|
}
|
|
else if (gtk_cairo_should_draw_window (cr, offscreen_box->offscreen_window1))
|
|
{
|
|
gtk_render_background (gtk_widget_get_style_context (widget), cr,
|
|
0, 0,
|
|
|
|
gdk_window_get_width (offscreen_box->offscreen_window1),
|
|
gdk_window_get_height (offscreen_box->offscreen_window1));
|
|
|
|
if (offscreen_box->child1)
|
|
gtk_container_propagate_draw (GTK_CONTAINER (widget),
|
|
offscreen_box->child1,
|
|
cr);
|
|
}
|
|
else if (gtk_cairo_should_draw_window (cr, offscreen_box->offscreen_window2))
|
|
{
|
|
gtk_render_background (gtk_widget_get_style_context (widget), cr,
|
|
0, 0,
|
|
gdk_window_get_width (offscreen_box->offscreen_window2),
|
|
gdk_window_get_height (offscreen_box->offscreen_window2));
|
|
|
|
if (offscreen_box->child2)
|
|
gtk_container_propagate_draw (GTK_CONTAINER (widget),
|
|
offscreen_box->child2,
|
|
cr);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|