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scrolledwindow: Remove overshoot window and displacement animation

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The displacement animation has been replaced by edge gradients, that
have a stronger color the harder overshooting is hit. This makes it
possible to remove the internal overshoot window, which was merely
used to have contents displaced when overshooting to top/left.

Overshooting to bottom/right used to cause queue_resize() to be
called on the scrolled window, this isn't necessary anymore either.

https://bugzilla.gnome.org/show_bug.cgi?id=731297
This commit is contained in:
Carlos Garnacho 2014-05-28 19:17:02 +02:00 committed by Matthias Clasen
parent 18c113cde1
commit 7bdc219464
1 changed files with 99 additions and 168 deletions
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267
gtk/gtkscrolledwindow.c
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@ -129,7 +129,7 @@
#define TOUCH_BYPASS_CAPTURED_THRESHOLD 30
/* Kinetic scrolling */
#define MAX_OVERSHOOT_DISTANCE 50
#define MAX_OVERSHOOT_DISTANCE 100
#define DECELERATION_FRICTION 4
#define OVERSHOOT_FRICTION 20
@ -164,7 +164,6 @@ struct _GtkScrolledWindowPrivate
gdouble drag_start_x;
gdouble drag_start_y;
GdkWindow *overshoot_window;
GdkDevice *drag_device;
guint kinetic_scrolling : 1;
guint capture_button_press : 1;
@ -265,8 +264,6 @@ static void gtk_scrolled_window_get_preferred_width_for_height (GtkWidget
gint *minimum_height,
gint *natural_height);
static void gtk_scrolled_window_realize (GtkWidget *widget);
static void gtk_scrolled_window_unrealize (GtkWidget *widget);
static void gtk_scrolled_window_map (GtkWidget *widget);
static void gtk_scrolled_window_unmap (GtkWidget *widget);
@ -284,7 +281,6 @@ static void gtk_scrolled_window_cancel_deceleration (GtkScrolledWindow *scrolled
static gboolean _gtk_scrolled_window_get_overshoot (GtkScrolledWindow *scrolled_window,
gint *overshoot_x,
gint *overshoot_y);
static void _gtk_scrolled_window_allocate_overshoot_window (GtkScrolledWindow *scrolled_window);
static void gtk_scrolled_window_start_deceleration (GtkScrolledWindow *scrolled_window);
@ -347,8 +343,6 @@ gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
widget_class->get_preferred_height = gtk_scrolled_window_get_preferred_height;
widget_class->get_preferred_height_for_width = gtk_scrolled_window_get_preferred_height_for_width;
widget_class->get_preferred_width_for_height = gtk_scrolled_window_get_preferred_width_for_height;
widget_class->realize = gtk_scrolled_window_realize;
widget_class->unrealize = gtk_scrolled_window_unrealize;
widget_class->map = gtk_scrolled_window_map;
widget_class->unmap = gtk_scrolled_window_unmap;
widget_class->grab_notify = gtk_scrolled_window_grab_notify;
@ -613,8 +607,6 @@ scrolled_window_drag_update_cb (GtkScrolledWindow *scrolled_window,
GtkGesture *gesture)
{
GtkScrolledWindowPrivate *priv = scrolled_window->priv;
gint old_overshoot_x, old_overshoot_y;
gint new_overshoot_x, new_overshoot_y;
GtkAdjustment *hadjustment;
GtkAdjustment *vadjustment;
gdouble dx, dy;
@ -628,9 +620,6 @@ scrolled_window_drag_update_cb (GtkScrolledWindow *scrolled_window,
GTK_EVENT_SEQUENCE_CLAIMED);
}
_gtk_scrolled_window_get_overshoot (scrolled_window,
&old_overshoot_x, &old_overshoot_y);
hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
if (hadjustment && priv->hscrollbar_visible)
{
@ -647,23 +636,8 @@ scrolled_window_drag_update_cb (GtkScrolledWindow *scrolled_window,
dy, TRUE, FALSE);
}
_gtk_scrolled_window_get_overshoot (scrolled_window,
&new_overshoot_x, &new_overshoot_y);
if (old_overshoot_x != new_overshoot_x ||
old_overshoot_y != new_overshoot_y)
{
if (new_overshoot_x >= 0 || new_overshoot_y >= 0)
{
/* We need to reallocate the widget to have it at
* negative offset, so there's a "gravity" on the
* bottom/right corner
*/
gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
}
else if (new_overshoot_x < 0 || new_overshoot_y < 0)
_gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
}
gdk_window_invalidate_rect (gtk_widget_get_window (GTK_WIDGET (scrolled_window)),
NULL, FALSE);
}
static void
@ -1601,6 +1575,96 @@ gtk_scrolled_window_draw_scrollbars_junction (GtkScrolledWindow *scrolled_window
gtk_style_context_restore (context);
}
static void
gtk_scrolled_window_draw_overshoot (GtkScrolledWindow *scrolled_window,
cairo_t *cr)
{
GtkWidget *widget = GTK_WIDGET (scrolled_window);
GtkAllocation allocation, relative_allocation;
gint overshoot_x, overshoot_y;
cairo_pattern_t *pattern;
GtkStyleContext *context;
cairo_matrix_t matrix;
GdkRectangle rect;
gdouble percent;
GdkRGBA color;
if (!_gtk_scrolled_window_get_overshoot (scrolled_window, &overshoot_x, &overshoot_y))
return;
cairo_push_group (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_LIGHTEN);
gtk_widget_get_allocation (widget, &allocation);
gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
context = gtk_widget_get_style_context (widget);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_OVERSHOOT);
gtk_style_context_get_background_color (context,
gtk_widget_get_state_flags (widget),
&color);
gtk_style_context_restore (context);
if (overshoot_x != 0)
{
percent = CLAMP (ABS ((gdouble) overshoot_x) / MAX_OVERSHOOT_DISTANCE, 0, 1);
rect = relative_allocation;
rect.width = MAX_OVERSHOOT_DISTANCE;
pattern = cairo_pattern_create_linear (0, 0, MAX_OVERSHOOT_DISTANCE, 0);
cairo_pattern_add_color_stop_rgba (pattern, 0, color.red, color.green, color.blue, color.alpha * percent);
cairo_pattern_add_color_stop_rgba (pattern, percent, color.red, color.green, color.blue, 0);
cairo_matrix_init_identity (&matrix);
if (overshoot_x > 0)
{
rect.x += relative_allocation.width - MAX_OVERSHOOT_DISTANCE;
cairo_matrix_translate (&matrix, relative_allocation.width, 0);
cairo_matrix_rotate (&matrix, G_PI);
}
cairo_pattern_set_matrix (pattern, &matrix);
gdk_cairo_rectangle (cr, &rect);
cairo_set_source (cr, pattern);
cairo_fill (cr);
cairo_pattern_destroy (pattern);
}
if (overshoot_y != 0)
{
percent = CLAMP (ABS ((gdouble) overshoot_y) / MAX_OVERSHOOT_DISTANCE, 0, 1);
rect = relative_allocation;
rect.height = MAX_OVERSHOOT_DISTANCE;
pattern = cairo_pattern_create_linear (0, 0, 0, MAX_OVERSHOOT_DISTANCE);
cairo_pattern_add_color_stop_rgba (pattern, 0, color.red, color.green, color.blue, color.alpha * percent);
cairo_pattern_add_color_stop_rgba (pattern, percent, color.red, color.green, color.blue, 0);
cairo_matrix_init_identity (&matrix);
if (overshoot_y > 0)
{
rect.y += relative_allocation.height - MAX_OVERSHOOT_DISTANCE;
cairo_matrix_translate (&matrix, 0, relative_allocation.height);
cairo_matrix_rotate (&matrix, G_PI);
}
cairo_pattern_set_matrix (pattern, &matrix);
cairo_set_source (cr, pattern);
gdk_cairo_rectangle (cr, &rect);
cairo_fill (cr);
cairo_pattern_destroy (pattern);
}
cairo_pop_group_to_source (cr);
cairo_paint (cr);
}
static gboolean
gtk_scrolled_window_draw (GtkWidget *widget,
cairo_t *cr)
@ -1655,6 +1719,8 @@ gtk_scrolled_window_draw (GtkWidget *widget,
GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->draw (widget, cr);
gtk_scrolled_window_draw_overshoot (scrolled_window, cr);
return FALSE;
}
@ -1933,44 +1999,6 @@ _gtk_scrolled_window_get_overshoot (GtkScrolledWindow *scrolled_window,
return (x != 0 || y != 0);
}
static void
_gtk_scrolled_window_allocate_overshoot_window (GtkScrolledWindow *scrolled_window)
{
GtkAllocation window_allocation, relative_allocation, allocation;
GtkScrolledWindowPrivate *priv = scrolled_window->priv;
GtkWidget *widget = GTK_WIDGET (scrolled_window);
gint overshoot_x, overshoot_y;
if (!gtk_widget_get_realized (widget))
return;
gtk_widget_get_allocation (widget, &allocation);
gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
_gtk_scrolled_window_get_overshoot (scrolled_window,
&overshoot_x, &overshoot_y);
window_allocation = relative_allocation;
window_allocation.x += allocation.x;
window_allocation.y += allocation.y;
/* Handle displacement to the left/top by moving the overshoot
* window, overshooting to the bottom/right is handled in
* gtk_scrolled_window_allocate_child()
*/
if (overshoot_x < 0)
window_allocation.x += -overshoot_x;
if (overshoot_y < 0)
window_allocation.y += -overshoot_y;
window_allocation.width -= ABS (overshoot_x);
window_allocation.height -= ABS (overshoot_y);
gdk_window_move_resize (priv->overshoot_window,
window_allocation.x, window_allocation.y,
window_allocation.width, window_allocation.height);
}
static void
gtk_scrolled_window_allocate_child (GtkScrolledWindow *swindow,
GtkAllocation *relative_allocation)
@ -1978,29 +2006,15 @@ gtk_scrolled_window_allocate_child (GtkScrolledWindow *swindow,
GtkWidget *widget = GTK_WIDGET (swindow), *child;
GtkAllocation allocation;
GtkAllocation child_allocation;
gint overshoot_x, overshoot_y;
child = gtk_bin_get_child (GTK_BIN (widget));
gtk_widget_get_allocation (widget, &allocation);
gtk_scrolled_window_relative_allocation (widget, relative_allocation);
_gtk_scrolled_window_get_overshoot (swindow, &overshoot_x, &overshoot_y);
/* Handle overshooting to the right/bottom by relocating the
* widget allocation to negative coordinates, so these edges
* stick to the overshoot window border.
*/
if (overshoot_x > 0)
child_allocation.x = -overshoot_x;
else
child_allocation.x = 0;
if (overshoot_y > 0)
child_allocation.y = -overshoot_y;
else
child_allocation.y = 0;
child_allocation.x = relative_allocation->x + allocation.x;
child_allocation.y = relative_allocation->y + allocation.y;
child_allocation.width = relative_allocation->width;
child_allocation.height = relative_allocation->height;
@ -2332,7 +2346,6 @@ gtk_scrolled_window_size_allocate (GtkWidget *widget,
gtk_widget_size_allocate (priv->vscrollbar, &child_allocation);
}
_gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
gtk_scrolled_window_check_attach_pan_gesture (scrolled_window);
}
@ -2479,7 +2492,6 @@ scrolled_window_deceleration_cb (GtkWidget *widget,
GtkScrolledWindow *scrolled_window = data->scrolled_window;
GtkScrolledWindowPrivate *priv = scrolled_window->priv;
GtkAdjustment *hadjustment, *vadjustment;
gint old_overshoot_x, old_overshoot_y, overshoot_x, overshoot_y;
gint64 current_time;
gdouble position, elapsed;
@ -2490,9 +2502,6 @@ scrolled_window_deceleration_cb (GtkWidget *widget,
hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
_gtk_scrolled_window_get_overshoot (scrolled_window,
&old_overshoot_x, &old_overshoot_y);
if (data->hscrolling &&
gtk_kinetic_scrolling_tick (data->hscrolling, elapsed, &position))
{
@ -2511,32 +2520,14 @@ scrolled_window_deceleration_cb (GtkWidget *widget,
else if (data->vscrolling)
g_clear_pointer (&data->vscrolling, (GDestroyNotify) gtk_kinetic_scrolling_free);
_gtk_scrolled_window_get_overshoot (scrolled_window,
&overshoot_x, &overshoot_y);
if (old_overshoot_x != overshoot_x ||
old_overshoot_y != overshoot_y)
{
if (overshoot_x >= 0 || overshoot_y >= 0)
{
/* We need to reallocate the widget to have it at
* negative offset, so there's a "gravity" on the
* bottom/right corner
*/
gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
}
else if (overshoot_x < 0 || overshoot_y < 0)
{
_gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
}
}
if (!data->hscrolling && !data->vscrolling)
{
gtk_scrolled_window_cancel_deceleration (scrolled_window);
return G_SOURCE_REMOVE;
}
gdk_window_invalidate_rect (gtk_widget_get_window (widget), NULL, FALSE);
return G_SOURCE_CONTINUE;
}
@ -2767,9 +2758,6 @@ gtk_scrolled_window_add (GtkContainer *container,
gtk_container_add (GTK_CONTAINER (scrollable_child), child);
}
if (gtk_widget_get_realized (GTK_WIDGET (bin)))
gtk_widget_set_parent_window (scrollable_child, priv->overshoot_window);
_gtk_bin_set_child (bin, scrollable_child);
gtk_widget_set_parent (scrollable_child, GTK_WIDGET (bin));
@ -3075,59 +3063,6 @@ gtk_scrolled_window_get_preferred_width_for_height (GtkWidget *widget,
GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_width, natural_width);
}
static void
gtk_scrolled_window_realize (GtkWidget *widget)
{
GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
GtkAllocation allocation, relative_allocation;
GdkWindowAttr attributes;
GtkWidget *child_widget;
gint attributes_mask;
gtk_widget_set_realized (widget, TRUE);
gtk_widget_get_allocation (widget, &allocation);
gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = allocation.x + relative_allocation.x;
attributes.y = allocation.y + relative_allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK |
GDK_BUTTON_MOTION_MASK | GDK_TOUCH_MASK | GDK_EXPOSURE_MASK;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
scrolled_window->priv->overshoot_window =
gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gtk_widget_register_window (widget, scrolled_window->priv->overshoot_window);
child_widget = gtk_bin_get_child (GTK_BIN (widget));
if (child_widget)
gtk_widget_set_parent_window (child_widget,
scrolled_window->priv->overshoot_window);
GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->realize (widget);
}
static void
gtk_scrolled_window_unrealize (GtkWidget *widget)
{
GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
gtk_widget_unregister_window (widget, scrolled_window->priv->overshoot_window);
gdk_window_destroy (scrolled_window->priv->overshoot_window);
scrolled_window->priv->overshoot_window = NULL;
gtk_widget_set_realized (widget, FALSE);
GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->unrealize (widget);
}
static gboolean
gtk_scrolled_window_should_animate (GtkScrolledWindow *sw)
{
@ -3168,8 +3103,6 @@ gtk_scrolled_window_map (GtkWidget *widget)
{
GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
gdk_window_show (scrolled_window->priv->overshoot_window);
GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->map (widget);
gtk_scrolled_window_update_animating (scrolled_window);
@ -3180,8 +3113,6 @@ gtk_scrolled_window_unmap (GtkWidget *widget)
{
GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
gdk_window_hide (scrolled_window->priv->overshoot_window);
GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->unmap (widget);
gtk_scrolled_window_update_animating (scrolled_window);