rect_anchor_dy);
}
-/**
- * gdk_surface_scroll:
- * @surface: a #GdkSurface
- * @dx: Amount to scroll in the X direction
- * @dy: Amount to scroll in the Y direction
- *
- * Scroll the contents of @surface, both pixels and children, by the
- * given amount. @surface itself does not move. Portions of the surface
- * that the scroll operation brings in from offscreen areas are
- * invalidated. The invalidated region may be bigger than what would
- * strictly be necessary.
- *
- * For X11, a minimum area will be invalidated if the surface has no
- * subsurfaces, or if the edges of the surface’s parent do not extend
- * beyond the edges of the surface. In other cases, a multi-step process
- * is used to scroll the surface which may produce temporary visual
- * artifacts and unnecessary invalidations.
- **/
-void
-gdk_surface_scroll (GdkSurface *surface,
- gint dx,
- gint dy)
-{
- GList *tmp_list;
-
- g_return_if_fail (GDK_IS_SURFACE (surface));
-
- if (dx == 0 && dy == 0)
- return;
-
- if (surface->destroyed)
- return;
-
- /* First move all child surfaces, without causing invalidation */
-
- tmp_list = surface->children;
- while (tmp_list)
- {
- GdkSurface *child = GDK_SURFACE (tmp_list->data);
-
- /* Just update the positions, the bits will move with the copy */
- child->x += dx;
- child->y += dy;
-
- tmp_list = tmp_list->next;
- }
-
- recompute_visible_regions (surface, TRUE);
-
- gdk_surface_invalidate_rect_full (surface, NULL, TRUE);
-}
-
static void
gdk_surface_set_cursor_internal (GdkSurface *surface,
GdkDevice *device,
}
-/*
- * Test scrolling
- */
-
-static int scroll_test_pos = 0.0;
-
-static void
-scroll_test_draw (GtkDrawingArea *darea,
- cairo_t *cr,
- int width,
- int height,
- gpointer adjustment)
-{
- gint i,j;
- gint imin, imax, jmin, jmax;
- GdkRectangle clip;
-
- gdk_cairo_get_clip_rectangle (cr, &clip);
-
- imin = (clip.x) / 10;
- imax = (clip.x + clip.width + 9) / 10;
-
- jmin = ((int)gtk_adjustment_get_value (adjustment) + clip.y) / 10;
- jmax = ((int)gtk_adjustment_get_value (adjustment) + clip.y + clip.height + 9) / 10;
-
- for (i=imin; i<imax; i++)
- for (j=jmin; j<jmax; j++)
- if ((i+j) % 2)
- cairo_rectangle (cr, 10*i, 10*j - (int)gtk_adjustment_get_value (adjustment), 1+i%10, 1+j%10);
-
- cairo_fill (cr);
-}
-
-static void
-scroll_test_scroll (GtkEventControllerScroll *scroll,
- double dx,
- double dy,
- GtkAdjustment *adjustment)
-{
- gdouble new_value;
-
- new_value = gtk_adjustment_get_value (adjustment) + dy * gtk_adjustment_get_page_increment (adjustment) / 2;
- new_value = CLAMP (new_value, gtk_adjustment_get_lower (adjustment), gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_page_size (adjustment));
- gtk_adjustment_set_value (adjustment, new_value);
-}
-
-static void
-scroll_test_configure (GtkWidget *widget, GdkEventConfigure *event,
- GtkAdjustment *adjustment)
-{
- GtkAllocation allocation;
-
- gtk_widget_get_allocation (widget, &allocation);
- gtk_adjustment_configure (adjustment,
- gtk_adjustment_get_value (adjustment),
- gtk_adjustment_get_lower (adjustment),
- gtk_adjustment_get_upper (adjustment),
- 0.1 * allocation.height,
- 0.9 * allocation.height,
- allocation.height);
-}
-
-static void
-scroll_test_adjustment_changed (GtkAdjustment *adjustment, GtkWidget *widget)
-{
- GdkSurface *window;
- gint dy;
-
- dy = scroll_test_pos - (int)gtk_adjustment_get_value (adjustment);
- scroll_test_pos = gtk_adjustment_get_value (adjustment);
-
- if (!gtk_widget_is_drawable (widget))
- return;
-
- window = gtk_widget_get_surface (widget);
- gdk_surface_scroll (window, 0, dy);
-}
-
-
-void
-create_scroll_test (GtkWidget *widget)
-{
- static GtkWidget *window = NULL;
- GtkWidget *content_area;
- GtkWidget *hbox;
- GtkWidget *drawing_area;
- GtkWidget *scrollbar;
- GtkAdjustment *adjustment;
- GtkEventController *controller;
-
- if (!window)
- {
- window = gtk_dialog_new ();
-
- gtk_window_set_display (GTK_WINDOW (window),
- gtk_widget_get_display (widget));
-
- g_signal_connect (window, "destroy",
- G_CALLBACK (gtk_widget_destroyed),
- &window);
-
- content_area = gtk_dialog_get_content_area (GTK_DIALOG (window));
-
- gtk_window_set_title (GTK_WINDOW (window), "Scroll Test");
-
- hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
- gtk_box_pack_start (GTK_BOX (content_area), hbox);
- gtk_widget_show (hbox);
-
- adjustment = gtk_adjustment_new (0.0, 0.0, 1000.0, 1.0, 180.0, 200.0);
- scroll_test_pos = 0.0;
-
- drawing_area = gtk_drawing_area_new ();
- gtk_widget_set_hexpand (drawing_area, TRUE);
- gtk_widget_set_vexpand (drawing_area, TRUE);
- gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (drawing_area), 200);
- gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (drawing_area), 200);
- gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area),
- scroll_test_draw,
- adjustment,
- g_object_unref);
- gtk_box_pack_start (GTK_BOX (hbox), drawing_area);
- gtk_widget_show (drawing_area);
-
- scrollbar = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, adjustment);
- gtk_box_pack_start (GTK_BOX (hbox), scrollbar);
- gtk_widget_show (scrollbar);
-
- g_signal_connect (drawing_area, "configure_event",
- G_CALLBACK (scroll_test_configure), adjustment);
- controller = gtk_event_controller_scroll_new (drawing_area, GTK_EVENT_CONTROLLER_SCROLL_VERTICAL);
- g_object_set_data_full (G_OBJECT (drawing_area), "scroll", controller, g_object_unref);
- g_signal_connect (controller, "scroll", G_CALLBACK (scroll_test_scroll), adjustment);
-
- g_signal_connect (adjustment, "value_changed",
- G_CALLBACK (scroll_test_adjustment_changed),
- drawing_area);
-
- /* .. And create some buttons */
-
- gtk_dialog_add_button (GTK_DIALOG (window),
- "Quit",
- GTK_RESPONSE_CLOSE);
- g_signal_connect_swapped (window, "response",
- G_CALLBACK (gtk_widget_destroy),
- window);
- }
-
- if (!gtk_widget_get_visible (window))
- gtk_widget_show (window);
- else
- gtk_widget_destroy (window);
-}
-
/*
* Timeout Test
*/
{ "spinbutton", create_spins },
{ "statusbar", create_statusbar },
{ "test mainloop", create_mainloop, TRUE },
- { "test scrolling", create_scroll_test },
{ "test timeout", create_timeout_test },
{ "toggle buttons", create_toggle_buttons },
{ "tooltips", create_tooltips },
projects / gtk4.git / commitdiff