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gtk2/gtk/gtktooltip.c
Rui Matos d56484f6ed tooltip: only update shape if the window is realized 
If we get a composited-changed signal before the tooltip is ever realized we
have nothing to do.

This actually prevents a segfault in maybe_update_shape() because calling
gtk_widget_get_window() on a non-realized widget returns NULL.

https://bugzilla.gnome.org/show_bug.cgi?id=662467
2011-10-23 16:26:18 +01:00

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/* gtktooltip.c
*
* Copyright (C) 2006-2007 Imendio AB
* Contact: Kristian Rietveld <kris@imendio.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "gtktooltip.h"
#include <math.h>
#include <string.h>
#include "gtkintl.h"
#include "gtkwindow.h"
#include "gtkmain.h"
#include "gtklabel.h"
#include "gtkimage.h"
#include "gtkbox.h"
#include "gtksizerequest.h"
#include "gtkwindowprivate.h"
/**
* SECTION:gtktooltip
* @Short_description: Add tips to your widgets
* @Title: GtkTooltip
*
* Basic tooltips can be realized simply by using gtk_widget_set_tooltip_text()
* or gtk_widget_set_tooltip_markup() without any explicit tooltip object.
*
* When you need a tooltip with a little more fancy contents, like adding an
* image, or you want the tooltip to have different contents per #GtkTreeView
* row or cell, you will have to do a little more work:
* <itemizedlist>
* <listitem>
* <para>
* Set the #GtkWidget:has-tooltip property to %TRUE, this will make GTK+
* monitor the widget for motion and related events which are needed to
* determine when and where to show a tooltip.
* </para>
* </listitem>
* <listitem>
* <para>
* Connect to the #GtkWidget::query-tooltip signal. This signal will be
* emitted when a tooltip is supposed to be shown. One of the arguments passed
* to the signal handler is a GtkTooltip object. This is the object that we
* are about to display as a tooltip, and can be manipulated in your callback
* using functions like gtk_tooltip_set_icon(). There are functions for setting
* the tooltip's markup, setting an image from a stock icon, or even putting in
* a custom widget.
* </para>
* </listitem>
* <listitem>
* <para>
* Return %TRUE from your query-tooltip handler. This causes the tooltip to be
* show. If you return %FALSE, it will not be shown.
* </para>
* </listitem>
* </itemizedlist>
*
* In the probably rare case where you want to have even more control over the
* tooltip that is about to be shown, you can set your own #GtkWindow which
* will be used as tooltip window. This works as follows:
* <itemizedlist>
* <listitem>
* <para>
* Set #GtkWidget:has-tooltip and connect to #GtkWidget::query-tooltip as
* before.
* </para>
* </listitem>
* <listitem>
* <para>
* Use gtk_widget_set_tooltip_window() to set a #GtkWindow created by you as
* tooltip window.
* </para>
* </listitem>
* <listitem>
* <para>
* In the #GtkWidget::query-tooltip callback you can access your window using
* gtk_widget_get_tooltip_window() and manipulate as you wish. The semantics of
* the return value are exactly as before, return %TRUE to show the window,
* %FALSE to not show it.
* </para>
* </listitem>
* </itemizedlist>
*/
#undef DEBUG_TOOLTIP
#define GTK_TOOLTIP_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_TOOLTIP, GtkTooltipClass))
#define GTK_IS_TOOLTIP_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_TOOLTIP))
#define GTK_TOOLTIP_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_TOOLTIP, GtkTooltipClass))
typedef struct _GtkTooltipClass GtkTooltipClass;
struct _GtkTooltip
{
GObject parent_instance;
GtkWidget *window;
GtkWidget *alignment;
GtkWidget *box;
GtkWidget *image;
GtkWidget *label;
GtkWidget *custom_widget;
GtkWindow *current_window;
GtkWidget *keyboard_widget;
GtkWidget *tooltip_widget;
GdkWindow *toplevel_window;
gdouble last_x;
gdouble last_y;
GdkWindow *last_window;
guint timeout_id;
guint browse_mode_timeout_id;
GdkRectangle tip_area;
guint browse_mode_enabled : 1;
guint keyboard_mode_enabled : 1;
guint tip_area_set : 1;
guint custom_was_reset : 1;
};
struct _GtkTooltipClass
{
GObjectClass parent_class;
};
#define GTK_TOOLTIP_VISIBLE(tooltip) ((tooltip)->current_window && gtk_widget_get_visible (GTK_WIDGET((tooltip)->current_window)))
static void gtk_tooltip_class_init (GtkTooltipClass *klass);
static void gtk_tooltip_init (GtkTooltip *tooltip);
static void gtk_tooltip_dispose (GObject *object);
static gboolean gtk_tooltip_paint_window (GtkTooltip *tooltip,
cairo_t *cr);
static void gtk_tooltip_realize_window (GtkTooltip *tooltip,
GtkWidget *widget);
static void gtk_tooltip_composited_changed (GtkTooltip *tooltip,
GtkWidget *widget);
static void gtk_tooltip_window_hide (GtkWidget *widget,
gpointer user_data);
static void gtk_tooltip_display_closed (GdkDisplay *display,
gboolean was_error,
GtkTooltip *tooltip);
static void gtk_tooltip_set_last_window (GtkTooltip *tooltip,
GdkWindow *window);
G_DEFINE_TYPE (GtkTooltip, gtk_tooltip, G_TYPE_OBJECT);
static void
gtk_tooltip_class_init (GtkTooltipClass *klass)
{
GObjectClass *object_class;
object_class = G_OBJECT_CLASS (klass);
object_class->dispose = gtk_tooltip_dispose;
}
static void
gtk_tooltip_init (GtkTooltip *tooltip)
{
GtkStyleContext *context;
GtkWidget *window;
GtkWidget *box;
GtkWidget *image;
GtkWidget *label;
GdkScreen *screen;
GdkVisual *visual;
tooltip->timeout_id = 0;
tooltip->browse_mode_timeout_id = 0;
tooltip->browse_mode_enabled = FALSE;
tooltip->keyboard_mode_enabled = FALSE;
tooltip->current_window = NULL;
tooltip->keyboard_widget = NULL;
tooltip->tooltip_widget = NULL;
tooltip->toplevel_window = NULL;
tooltip->last_window = NULL;
window = g_object_ref (gtk_window_new (GTK_WINDOW_POPUP));
screen = gtk_widget_get_screen (window);
visual = gdk_screen_get_rgba_visual (screen);
if (visual != NULL)
gtk_widget_set_visual (window, visual);
gtk_window_set_type_hint (GTK_WINDOW (window), GDK_WINDOW_TYPE_HINT_TOOLTIP);
gtk_widget_set_app_paintable (window, TRUE);
gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
gtk_widget_set_name (window, "gtk-tooltip");
g_signal_connect (window, "hide",
G_CALLBACK (gtk_tooltip_window_hide), tooltip);
context = gtk_widget_get_style_context (window);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOOLTIP);
g_signal_connect_swapped (window, "draw",
G_CALLBACK (gtk_tooltip_paint_window), tooltip);
g_signal_connect_swapped (window, "realize",
G_CALLBACK (gtk_tooltip_realize_window), tooltip);
g_signal_connect_swapped (window, "composited-changed",
G_CALLBACK (gtk_tooltip_composited_changed), tooltip);
/* FIXME: don't hardcode the padding */
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_widget_set_margin_left (box, 6);
gtk_widget_set_margin_right (box, 6);
gtk_widget_set_margin_top (box, 6);
gtk_widget_set_margin_bottom (box, 6);
gtk_container_add (GTK_CONTAINER (window), box);
gtk_widget_show (box);
image = gtk_image_new ();
gtk_box_pack_start (GTK_BOX (box), image, FALSE, FALSE, 0);
label = gtk_label_new ("");
gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 0);
tooltip->window = window;
tooltip->box = box;
tooltip->image = image;
tooltip->label = label;
tooltip->custom_widget = NULL;
}
static void
gtk_tooltip_dispose (GObject *object)
{
GtkTooltip *tooltip = GTK_TOOLTIP (object);
if (tooltip->timeout_id)
{
g_source_remove (tooltip->timeout_id);
tooltip->timeout_id = 0;
}
if (tooltip->browse_mode_timeout_id)
{
g_source_remove (tooltip->browse_mode_timeout_id);
tooltip->browse_mode_timeout_id = 0;
}
gtk_tooltip_set_custom (tooltip, NULL);
gtk_tooltip_set_last_window (tooltip, NULL);
if (tooltip->window)
{
GdkDisplay *display;
display = gtk_widget_get_display (tooltip->window);
g_signal_handlers_disconnect_by_func (display,
gtk_tooltip_display_closed,
tooltip);
gtk_widget_destroy (tooltip->window);
tooltip->window = NULL;
}
G_OBJECT_CLASS (gtk_tooltip_parent_class)->dispose (object);
}
/* public API */
/**
* gtk_tooltip_set_markup:
* @tooltip: a #GtkTooltip
* @markup: (allow-none): a markup string (see <link linkend="PangoMarkupFormat">Pango markup format</link>) or %NULL
*
* Sets the text of the tooltip to be @markup, which is marked up
* with the <link
* linkend="PangoMarkupFormat">Pango text markup language</link>.
* If @markup is %NULL, the label will be hidden.
*
* Since: 2.12
*/
void
gtk_tooltip_set_markup (GtkTooltip *tooltip,
const gchar *markup)
{
g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
gtk_label_set_markup (GTK_LABEL (tooltip->label), markup);
if (markup)
gtk_widget_show (tooltip->label);
else
gtk_widget_hide (tooltip->label);
}
/**
* gtk_tooltip_set_text:
* @tooltip: a #GtkTooltip
* @text: (allow-none): a text string or %NULL
*
* Sets the text of the tooltip to be @text. If @text is %NULL, the label
* will be hidden. See also gtk_tooltip_set_markup().
*
* Since: 2.12
*/
void
gtk_tooltip_set_text (GtkTooltip *tooltip,
const gchar *text)
{
g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
gtk_label_set_text (GTK_LABEL (tooltip->label), text);
if (text)
gtk_widget_show (tooltip->label);
else
gtk_widget_hide (tooltip->label);
}
/**
* gtk_tooltip_set_icon:
* @tooltip: a #GtkTooltip
* @pixbuf: (allow-none): a #GdkPixbuf, or %NULL
*
* Sets the icon of the tooltip (which is in front of the text) to be
* @pixbuf. If @pixbuf is %NULL, the image will be hidden.
*
* Since: 2.12
*/
void
gtk_tooltip_set_icon (GtkTooltip *tooltip,
GdkPixbuf *pixbuf)
{
g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
if (pixbuf)
g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
gtk_image_set_from_pixbuf (GTK_IMAGE (tooltip->image), pixbuf);
if (pixbuf)
gtk_widget_show (tooltip->image);
else
gtk_widget_hide (tooltip->image);
}
/**
* gtk_tooltip_set_icon_from_stock:
* @tooltip: a #GtkTooltip
* @stock_id: (allow-none): a stock id, or %NULL
* @size: (type int): a stock icon size
*
* Sets the icon of the tooltip (which is in front of the text) to be
* the stock item indicated by @stock_id with the size indicated
* by @size. If @stock_id is %NULL, the image will be hidden.
*
* Since: 2.12
*/
void
gtk_tooltip_set_icon_from_stock (GtkTooltip *tooltip,
const gchar *stock_id,
GtkIconSize size)
{
g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
gtk_image_set_from_stock (GTK_IMAGE (tooltip->image), stock_id, size);
if (stock_id)
gtk_widget_show (tooltip->image);
else
gtk_widget_hide (tooltip->image);
}
/**
* gtk_tooltip_set_icon_from_icon_name:
* @tooltip: a #GtkTooltip
* @icon_name: (allow-none): an icon name, or %NULL
* @size: (type int): a stock icon size
*
* Sets the icon of the tooltip (which is in front of the text) to be
* the icon indicated by @icon_name with the size indicated
* by @size. If @icon_name is %NULL, the image will be hidden.
*
* Since: 2.14
*/
void
gtk_tooltip_set_icon_from_icon_name (GtkTooltip *tooltip,
const gchar *icon_name,
GtkIconSize size)
{
g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
gtk_image_set_from_icon_name (GTK_IMAGE (tooltip->image), icon_name, size);
if (icon_name)
gtk_widget_show (tooltip->image);
else
gtk_widget_hide (tooltip->image);
}
/**
* gtk_tooltip_set_icon_from_gicon:
* @tooltip: a #GtkTooltip
* @gicon: (allow-none): a #GIcon representing the icon, or %NULL
* @size: (type int): a stock icon size
*
* Sets the icon of the tooltip (which is in front of the text)
* to be the icon indicated by @gicon with the size indicated
* by @size. If @gicon is %NULL, the image will be hidden.
*
* Since: 2.20
*/
void
gtk_tooltip_set_icon_from_gicon (GtkTooltip *tooltip,
GIcon *gicon,
GtkIconSize size)
{
g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
gtk_image_set_from_gicon (GTK_IMAGE (tooltip->image), gicon, size);
if (gicon)
gtk_widget_show (tooltip->image);
else
gtk_widget_hide (tooltip->image);
}
/**
* gtk_tooltip_set_custom:
* @tooltip: a #GtkTooltip
* @custom_widget: (allow-none): a #GtkWidget, or %NULL to unset the old custom widget.
*
* Replaces the widget packed into the tooltip with
* @custom_widget. @custom_widget does not get destroyed when the tooltip goes
* away.
* By default a box with a #GtkImage and #GtkLabel is embedded in
* the tooltip, which can be configured using gtk_tooltip_set_markup()
* and gtk_tooltip_set_icon().
*
* Since: 2.12
*/
void
gtk_tooltip_set_custom (GtkTooltip *tooltip,
GtkWidget *custom_widget)
{
g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
if (custom_widget)
g_return_if_fail (GTK_IS_WIDGET (custom_widget));
/* The custom widget has been updated from the query-tooltip
* callback, so we do not want to reset the custom widget later on.
*/
tooltip->custom_was_reset = TRUE;
/* No need to do anything if the custom widget stays the same */
if (tooltip->custom_widget == custom_widget)
return;
if (tooltip->custom_widget)
{
GtkWidget *custom = tooltip->custom_widget;
/* Note: We must reset tooltip->custom_widget first,
* since gtk_container_remove() will recurse into
* gtk_tooltip_set_custom()
*/
tooltip->custom_widget = NULL;
gtk_container_remove (GTK_CONTAINER (tooltip->box), custom);
g_object_unref (custom);
}
if (custom_widget)
{
tooltip->custom_widget = g_object_ref (custom_widget);
gtk_container_add (GTK_CONTAINER (tooltip->box), custom_widget);
gtk_widget_show (custom_widget);
}
}
/**
* gtk_tooltip_set_tip_area:
* @tooltip: a #GtkTooltip
* @rect: a #GdkRectangle
*
* Sets the area of the widget, where the contents of this tooltip apply,
* to be @rect (in widget coordinates). This is especially useful for
* properly setting tooltips on #GtkTreeView rows and cells, #GtkIconViews,
* etc.
*
* For setting tooltips on #GtkTreeView, please refer to the convenience
* functions for this: gtk_tree_view_set_tooltip_row() and
* gtk_tree_view_set_tooltip_cell().
*
* Since: 2.12
*/
void
gtk_tooltip_set_tip_area (GtkTooltip *tooltip,
const GdkRectangle *rect)
{
g_return_if_fail (GTK_IS_TOOLTIP (tooltip));
if (!rect)
tooltip->tip_area_set = FALSE;
else
{
tooltip->tip_area_set = TRUE;
tooltip->tip_area = *rect;
}
}
/**
* gtk_tooltip_trigger_tooltip_query:
* @display: a #GdkDisplay
*
* Triggers a new tooltip query on @display, in order to update the current
* visible tooltip, or to show/hide the current tooltip. This function is
* useful to call when, for example, the state of the widget changed by a
* key press.
*
* Since: 2.12
*/
void
gtk_tooltip_trigger_tooltip_query (GdkDisplay *display)
{
gint x, y;
GdkWindow *window;
GdkEvent event;
GdkDevice *device;
/* Trigger logic as if the mouse moved */
device = gdk_device_manager_get_client_pointer (gdk_display_get_device_manager (display));
window = gdk_device_get_window_at_position (device, &x, &y);
if (!window)
return;
event.type = GDK_MOTION_NOTIFY;
event.motion.window = window;
event.motion.x = x;
event.motion.y = y;
event.motion.is_hint = FALSE;
gdk_window_get_root_coords (window, x, y, &x, &y);
event.motion.x_root = x;
event.motion.y_root = y;
_gtk_tooltip_handle_event (&event);
}
/* private functions */
static void
gtk_tooltip_reset (GtkTooltip *tooltip)
{
gtk_tooltip_set_markup (tooltip, NULL);
gtk_tooltip_set_icon (tooltip, NULL);
gtk_tooltip_set_tip_area (tooltip, NULL);
/* See if the custom widget is again set from the query-tooltip
* callback.
*/
tooltip->custom_was_reset = FALSE;
}
static void
paint_background_and_frame (GtkTooltip *tooltip,
cairo_t *cr)
{
GtkStyleContext *context;
gint width, height;
width = gtk_widget_get_allocated_width (tooltip->window);
height = gtk_widget_get_allocated_height (tooltip->window);
context = gtk_widget_get_style_context (tooltip->window);
gtk_render_background (context, cr,
0, 0, width, height);
gtk_render_frame (context, cr,
0, 0, width, height);
}
static void
maybe_update_shape (GtkTooltip *tooltip)
{
cairo_t *cr;
cairo_surface_t *surface;
cairo_region_t *region;
gint width, height;
/* fallback to XShape only for non-composited clients */
if (gtk_widget_is_composited (tooltip->window))
{
gtk_widget_shape_combine_region (tooltip->window, NULL);
return;
}
surface = gdk_window_create_similar_surface (gtk_widget_get_window (tooltip->window),
CAIRO_CONTENT_COLOR_ALPHA,
gtk_widget_get_allocated_width (tooltip->window),
gtk_widget_get_allocated_height (tooltip->window));
cr = cairo_create (surface);
paint_background_and_frame (tooltip, cr);
cairo_destroy (cr);
region = gdk_cairo_region_create_from_surface (surface);
gtk_widget_shape_combine_region (tooltip->window, region);
cairo_surface_destroy (surface);
cairo_region_destroy (region);
}
static void
gtk_tooltip_composited_changed (GtkTooltip *tooltip,
GtkWidget *widget)
{
if (gtk_widget_get_realized (tooltip->window))
maybe_update_shape (tooltip);
}
static void
gtk_tooltip_realize_window (GtkTooltip *tooltip,
GtkWidget *widget)
{
maybe_update_shape (tooltip);
}
static gboolean
gtk_tooltip_paint_window (GtkTooltip *tooltip,
cairo_t *cr)
{
if (gtk_widget_is_composited (tooltip->window))
{
/* clear any background */
cairo_save (cr);
cairo_set_source_rgba (cr, 0, 0, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
cairo_restore (cr);
}
maybe_update_shape (tooltip);
paint_background_and_frame (tooltip, cr);
return FALSE;
}
static void
gtk_tooltip_window_hide (GtkWidget *widget,
gpointer user_data)
{
GtkTooltip *tooltip = GTK_TOOLTIP (user_data);
gtk_tooltip_set_custom (tooltip, NULL);
}
/* event handling, etc */
struct ChildLocation
{
GtkWidget *child;
GtkWidget *container;
gint x;
gint y;
};
static void
child_location_foreach (GtkWidget *child,
gpointer data)
{
GtkAllocation child_allocation;
gint x, y;
struct ChildLocation *child_loc = data;
/* Ignore invisible widgets */
if (!gtk_widget_is_drawable (child))
return;
gtk_widget_get_allocation (child, &child_allocation);
x = 0;
y = 0;
/* (child_loc->x, child_loc->y) are relative to
* child_loc->container's allocation.
*/
if (!child_loc->child &&
gtk_widget_translate_coordinates (child_loc->container, child,
child_loc->x, child_loc->y,
&x, &y))
{
#ifdef DEBUG_TOOLTIP
g_print ("candidate: %s alloc=[(%d,%d) %dx%d] (%d, %d)->(%d, %d)\n",
gtk_widget_get_name (child),
child_allocation.x,
child_allocation.y,
child_allocation.width,
child_allocation.height,
child_loc->x, child_loc->y,
x, y);
#endif /* DEBUG_TOOLTIP */
/* (x, y) relative to child's allocation. */
if (x >= 0 && x < child_allocation.width
&& y >= 0 && y < child_allocation.height)
{
if (GTK_IS_CONTAINER (child))
{
struct ChildLocation tmp = { NULL, NULL, 0, 0 };
/* Take (x, y) relative the child's allocation and
* recurse.
*/
tmp.x = x;
tmp.y = y;
tmp.container = child;
gtk_container_forall (GTK_CONTAINER (child),
child_location_foreach, &tmp);
if (tmp.child)
child_loc->child = tmp.child;
else
child_loc->child = child;
}
else
child_loc->child = child;
}
}
}
/* Translates coordinates from dest_widget->window relative (src_x, src_y),
* to allocation relative (dest_x, dest_y) of dest_widget.
*/
static void
window_to_alloc (GtkWidget *dest_widget,
gint src_x,
gint src_y,
gint *dest_x,
gint *dest_y)
{
GtkAllocation allocation;
gtk_widget_get_allocation (dest_widget, &allocation);
/* Translate from window relative to allocation relative */
if (gtk_widget_get_has_window (dest_widget) &&
gtk_widget_get_parent (dest_widget))
{
gint wx, wy;
gdk_window_get_position (gtk_widget_get_window (dest_widget),
&wx, &wy);
/* Offset coordinates if widget->window is smaller than
* widget->allocation.
*/
src_x += wx - allocation.x;
src_y += wy - allocation.y;
}
else
{
src_x -= allocation.x;
src_y -= allocation.y;
}
if (dest_x)
*dest_x = src_x;
if (dest_y)
*dest_y = src_y;
}
/* Translates coordinates from window relative (x, y) to
* allocation relative (x, y) of the returned widget.
*/
GtkWidget *
_gtk_widget_find_at_coords (GdkWindow *window,
gint window_x,
gint window_y,
gint *widget_x,
gint *widget_y)
{
GtkWidget *event_widget;
struct ChildLocation child_loc = { NULL, NULL, 0, 0 };
g_return_val_if_fail (GDK_IS_WINDOW (window), NULL);
gdk_window_get_user_data (window, (void **)&event_widget);
if (!event_widget)
return NULL;
#ifdef DEBUG_TOOLTIP
g_print ("event window %p (belonging to %p (%s)) (%d, %d)\n",
window, event_widget, gtk_widget_get_name (event_widget),
window_x, window_y);
#endif
/* Coordinates are relative to event window */
child_loc.x = window_x;
child_loc.y = window_y;
/* We go down the window hierarchy to the widget->window,
* coordinates stay relative to the current window.
* We end up with window == widget->window, coordinates relative to that.
*/
while (window && window != gtk_widget_get_window (event_widget))
{
gdouble px, py;
gdk_window_coords_to_parent (window,
child_loc.x, child_loc.y,
&px, &py);
child_loc.x = px;
child_loc.y = py;
window = gdk_window_get_effective_parent (window);
}
/* Failing to find widget->window can happen for e.g. a detached handle box;
* chaining ::query-tooltip up to its parent probably makes little sense,
* and users better implement tooltips on handle_box->child.
* so we simply ignore the event for tooltips here.
*/
if (!window)
return NULL;
/* Convert the window relative coordinates to allocation
* relative coordinates.
*/
window_to_alloc (event_widget,
child_loc.x, child_loc.y,
&child_loc.x, &child_loc.y);
if (GTK_IS_CONTAINER (event_widget))
{
GtkWidget *container = event_widget;
child_loc.container = event_widget;
child_loc.child = NULL;
gtk_container_forall (GTK_CONTAINER (event_widget),
child_location_foreach, &child_loc);
/* Here we have a widget, with coordinates relative to
* child_loc.container's allocation.
*/
if (child_loc.child)
event_widget = child_loc.child;
else if (child_loc.container)
event_widget = child_loc.container;
/* Translate to event_widget's allocation */
gtk_widget_translate_coordinates (container, event_widget,
child_loc.x, child_loc.y,
&child_loc.x, &child_loc.y);
}
/* We return (x, y) relative to the allocation of event_widget. */
if (widget_x)
*widget_x = child_loc.x;
if (widget_y)
*widget_y = child_loc.y;
return event_widget;
}
/* Ignores (x, y) on input, translates event coordinates to
* allocation relative (x, y) of the returned widget.
*/
static GtkWidget *
find_topmost_widget_coords_from_event (GdkEvent *event,
gint *x,
gint *y)
{
GtkAllocation allocation;
gint tx, ty;
gdouble dx, dy;
GtkWidget *tmp;
gdk_event_get_coords (event, &dx, &dy);
/* Returns coordinates relative to tmp's allocation. */
tmp = _gtk_widget_find_at_coords (event->any.window, dx, dy, &tx, &ty);
if (!tmp)
return NULL;
/* Make sure the pointer can actually be on the widget returned. */
gtk_widget_get_allocation (tmp, &allocation);
if (tx < 0 || tx >= allocation.width ||
ty < 0 || ty >= allocation.height)
return NULL;
if (x)
*x = tx;
if (y)
*y = ty;
return tmp;
}
static gint
tooltip_browse_mode_expired (gpointer data)
{
GtkTooltip *tooltip;
tooltip = GTK_TOOLTIP (data);
tooltip->browse_mode_enabled = FALSE;
tooltip->browse_mode_timeout_id = 0;
/* destroy tooltip */
g_object_set_data (G_OBJECT (gtk_widget_get_display (tooltip->window)),
"gdk-display-current-tooltip", NULL);
return FALSE;
}
static void
gtk_tooltip_display_closed (GdkDisplay *display,
gboolean was_error,
GtkTooltip *tooltip)
{
g_object_set_data (G_OBJECT (display), "gdk-display-current-tooltip", NULL);
}
static void
gtk_tooltip_set_last_window (GtkTooltip *tooltip,
GdkWindow *window)
{
if (tooltip->last_window == window)
return;
if (tooltip->last_window)
g_object_remove_weak_pointer (G_OBJECT (tooltip->last_window),
(gpointer *) &tooltip->last_window);
tooltip->last_window = window;
if (window)
g_object_add_weak_pointer (G_OBJECT (tooltip->last_window),
(gpointer *) &tooltip->last_window);
}
static gboolean
gtk_tooltip_run_requery (GtkWidget **widget,
GtkTooltip *tooltip,
gint *x,
gint *y)
{
gboolean has_tooltip = FALSE;
gboolean return_value = FALSE;
gtk_tooltip_reset (tooltip);
do
{
g_object_get (*widget,
"has-tooltip", &has_tooltip,
NULL);
if (has_tooltip)
g_signal_emit_by_name (*widget,
"query-tooltip",
*x, *y,
tooltip->keyboard_mode_enabled,
tooltip,
&return_value);
if (!return_value)
{
GtkWidget *parent = gtk_widget_get_parent (*widget);
if (parent)
gtk_widget_translate_coordinates (*widget, parent, *x, *y, x, y);
*widget = parent;
}
else
break;
}
while (*widget);
/* If the custom widget was not reset in the query-tooltip
* callback, we clear it here.
*/
if (!tooltip->custom_was_reset)
gtk_tooltip_set_custom (tooltip, NULL);
return return_value;
}
static void
get_bounding_box (GtkWidget *widget,
GdkRectangle *bounds)
{
GtkAllocation allocation;
GdkWindow *window;
gint x, y;
gint w, h;
gint x1, y1;
gint x2, y2;
gint x3, y3;
gint x4, y4;
window = gtk_widget_get_parent_window (widget);
if (window == NULL)
window = gtk_widget_get_window (widget);
gtk_widget_get_allocation (widget, &allocation);
x = allocation.x;
y = allocation.y;
w = allocation.width;
h = allocation.height;
gdk_window_get_root_coords (window, x, y, &x1, &y1);
gdk_window_get_root_coords (window, x + w, y, &x2, &y2);
gdk_window_get_root_coords (window, x, y + h, &x3, &y3);
gdk_window_get_root_coords (window, x + w, y + h, &x4, &y4);
#define MIN4(a,b,c,d) MIN(MIN(a,b),MIN(c,d))
#define MAX4(a,b,c,d) MAX(MAX(a,b),MAX(c,d))
bounds->x = floor (MIN4 (x1, x2, x3, x4));
bounds->y = floor (MIN4 (y1, y2, y3, y4));
bounds->width = ceil (MAX4 (x1, x2, x3, x4)) - bounds->x;
bounds->height = ceil (MAX4 (y1, y2, y3, y4)) - bounds->y;
}
static void
gtk_tooltip_position (GtkTooltip *tooltip,
GdkDisplay *display,
GtkWidget *new_tooltip_widget)
{
gint x, y, width, height;
GdkScreen *screen;
gint monitor_num;
GdkRectangle monitor;
guint cursor_size;
GdkRectangle bounds;
#define MAX_DISTANCE 32
gtk_widget_realize (GTK_WIDGET (tooltip->current_window));
tooltip->tooltip_widget = new_tooltip_widget;
screen = gtk_widget_get_screen (new_tooltip_widget);
width = gtk_widget_get_allocated_width (GTK_WIDGET (tooltip->current_window));
height = gtk_widget_get_allocated_height (GTK_WIDGET (tooltip->current_window));
monitor_num = gdk_screen_get_monitor_at_point (screen,
tooltip->last_x,
tooltip->last_y);
gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);
get_bounding_box (new_tooltip_widget, &bounds);
/* Position the tooltip */
cursor_size = gdk_display_get_default_cursor_size (display);
/* Try below */
x = bounds.x + bounds.width / 2 - width / 2;
y = bounds.y + bounds.height + 4;
if (y + height <= monitor.y + monitor.height)
{
if (tooltip->keyboard_mode_enabled)
goto found;
if (y <= tooltip->last_y + cursor_size + MAX_DISTANCE)
{
if (tooltip->last_x + cursor_size + MAX_DISTANCE < x)
x = tooltip->last_x + cursor_size + MAX_DISTANCE;
else if (x + width < tooltip->last_x - MAX_DISTANCE)
x = tooltip->last_x - MAX_DISTANCE - width;
goto found;
}
}
/* Try above */
x = bounds.x + bounds.width / 2 - width / 2;
y = bounds.y - height - 4;
if (y >= monitor.y)
{
if (tooltip->keyboard_mode_enabled)
goto found;
if (y + height >= tooltip->last_y - MAX_DISTANCE)
{
if (tooltip->last_x + cursor_size + MAX_DISTANCE < x)
x = tooltip->last_x + cursor_size + MAX_DISTANCE;
else if (x + width < tooltip->last_x - MAX_DISTANCE)
x = tooltip->last_x - MAX_DISTANCE - width;
goto found;
}
}
/* Try right FIXME: flip on rtl ? */
x = bounds.x + bounds.width + 4;
y = bounds.y + bounds.height / 2 - height / 2;
if (x + width <= monitor.x + monitor.width)
{
if (tooltip->keyboard_mode_enabled)
goto found;
if (x <= tooltip->last_x + cursor_size + MAX_DISTANCE)
{
if (tooltip->last_y + cursor_size + MAX_DISTANCE < y)
y = tooltip->last_y + cursor_size + MAX_DISTANCE;
else if (y + height < tooltip->last_y - MAX_DISTANCE)
y = tooltip->last_y - MAX_DISTANCE - height;
goto found;
}
}
/* Try left FIXME: flip on rtl ? */
x = bounds.x - width - 4;
y = bounds.y + bounds.height / 2 - height / 2;
if (x >= monitor.x)
{
if (tooltip->keyboard_mode_enabled)
goto found;
if (x + width >= tooltip->last_x - MAX_DISTANCE)
{
if (tooltip->last_y + cursor_size + MAX_DISTANCE < y)
y = tooltip->last_y + cursor_size + MAX_DISTANCE;
else if (y + height < tooltip->last_y - MAX_DISTANCE)
y = tooltip->last_y - MAX_DISTANCE - height;
goto found;
}
}
/* Fallback */
if (tooltip->keyboard_mode_enabled)
{
x = bounds.x + bounds.width / 2 - width / 2;
y = bounds.y + bounds.height + 4;
}
else
{
/* At cursor */
x = tooltip->last_x + cursor_size * 3 / 4;
y = tooltip->last_y + cursor_size * 3 / 4;
}
found:
/* Show it */
if (tooltip->current_window)
{
if (x + width > monitor.x + monitor.width)
x -= x - (monitor.x + monitor.width) + width;
else if (x < monitor.x)
x = monitor.x;
if (y + height > monitor.y + monitor.height)
y -= y - (monitor.y + monitor.height) + height;
else if (y < monitor.y)
y = monitor.y;
if (!tooltip->keyboard_mode_enabled)
{
/* don't pop up under the pointer */
if (x <= tooltip->last_x && tooltip->last_x < x + width &&
y <= tooltip->last_y && tooltip->last_y < y + height)
y = tooltip->last_y - height - 2;
}
gtk_window_move (GTK_WINDOW (tooltip->current_window), x, y);
gtk_widget_show (GTK_WIDGET (tooltip->current_window));
}
}
static void
gtk_tooltip_show_tooltip (GdkDisplay *display)
{
gint x, y;
GdkScreen *screen;
GdkWindow *window;
GtkWidget *tooltip_widget;
GtkTooltip *tooltip;
gboolean has_tooltip;
gboolean return_value = FALSE;
tooltip = g_object_get_data (G_OBJECT (display),
"gdk-display-current-tooltip");
if (tooltip->keyboard_mode_enabled)
{
x = y = -1;
tooltip_widget = tooltip->keyboard_widget;
}
else
{
gint tx, ty;
window = tooltip->last_window;
if (!GDK_IS_WINDOW (window))
return;
gdk_window_get_pointer (window, &x, &y, NULL);
gdk_window_get_root_coords (window, x, y, &tx, &ty);
tooltip->last_x = tx;
tooltip->last_y = ty;
tooltip_widget = _gtk_widget_find_at_coords (window, x, y, &x, &y);
}
if (!tooltip_widget)
return;
g_object_get (tooltip_widget, "has-tooltip", &has_tooltip, NULL);
return_value = gtk_tooltip_run_requery (&tooltip_widget, tooltip, &x, &y);
if (!return_value)
return;
if (!tooltip->current_window)
{
if (gtk_widget_get_tooltip_window (tooltip_widget))
tooltip->current_window = gtk_widget_get_tooltip_window (tooltip_widget);
else
tooltip->current_window = GTK_WINDOW (GTK_TOOLTIP (tooltip)->window);
}
screen = gtk_widget_get_screen (tooltip_widget);
/* FIXME: should use tooltip->current_window iso tooltip->window */
if (screen != gtk_widget_get_screen (tooltip->window))
{
g_signal_handlers_disconnect_by_func (display,
gtk_tooltip_display_closed,
tooltip);
gtk_window_set_screen (GTK_WINDOW (tooltip->window), screen);
g_signal_connect (display, "closed",
G_CALLBACK (gtk_tooltip_display_closed), tooltip);
}
gtk_tooltip_position (tooltip, display, tooltip_widget);
/* Now a tooltip is visible again on the display, make sure browse
* mode is enabled.
*/
tooltip->browse_mode_enabled = TRUE;
if (tooltip->browse_mode_timeout_id)
{
g_source_remove (tooltip->browse_mode_timeout_id);
tooltip->browse_mode_timeout_id = 0;
}
}
static void
gtk_tooltip_hide_tooltip (GtkTooltip *tooltip)
{
if (!tooltip)
return;
if (tooltip->timeout_id)
{
g_source_remove (tooltip->timeout_id);
tooltip->timeout_id = 0;
}
if (!GTK_TOOLTIP_VISIBLE (tooltip))
return;
tooltip->tooltip_widget = NULL;
if (!tooltip->keyboard_mode_enabled)
{
guint timeout;
GtkSettings *settings;
settings = gtk_widget_get_settings (GTK_WIDGET (tooltip->window));
g_object_get (settings,
"gtk-tooltip-browse-mode-timeout", &timeout,
NULL);
/* The tooltip is gone, after (by default, should be configurable) 500ms
* we want to turn off browse mode
*/
if (!tooltip->browse_mode_timeout_id)
tooltip->browse_mode_timeout_id =
gdk_threads_add_timeout_full (0, timeout,
tooltip_browse_mode_expired,
g_object_ref (tooltip),
g_object_unref);
}
else
{
if (tooltip->browse_mode_timeout_id)
{
g_source_remove (tooltip->browse_mode_timeout_id);
tooltip->browse_mode_timeout_id = 0;
}
}
if (tooltip->current_window)
{
gtk_widget_hide (GTK_WIDGET (tooltip->current_window));
tooltip->current_window = NULL;
}
}
static gint
tooltip_popup_timeout (gpointer data)
{
GdkDisplay *display;
GtkTooltip *tooltip;
display = GDK_DISPLAY (data);
tooltip = g_object_get_data (G_OBJECT (display),
"gdk-display-current-tooltip");
/* This usually does not happen. However, it does occur in language
* bindings were reference counting of objects behaves differently.
*/
if (!tooltip)
return FALSE;
gtk_tooltip_show_tooltip (display);
tooltip->timeout_id = 0;
return FALSE;
}
static void
gtk_tooltip_start_delay (GdkDisplay *display)
{
guint timeout;
GtkTooltip *tooltip;
GtkSettings *settings;
tooltip = g_object_get_data (G_OBJECT (display),
"gdk-display-current-tooltip");
if (!tooltip || GTK_TOOLTIP_VISIBLE (tooltip))
return;
if (tooltip->timeout_id)
g_source_remove (tooltip->timeout_id);
settings = gtk_widget_get_settings (GTK_WIDGET (tooltip->window));
if (tooltip->browse_mode_enabled)
g_object_get (settings, "gtk-tooltip-browse-timeout", &timeout, NULL);
else
g_object_get (settings, "gtk-tooltip-timeout", &timeout, NULL);
tooltip->timeout_id = gdk_threads_add_timeout_full (0, timeout,
tooltip_popup_timeout,
g_object_ref (display),
g_object_unref);
}
void
_gtk_tooltip_focus_in (GtkWidget *widget)
{
gint x, y;
gboolean return_value = FALSE;
GdkDisplay *display;
GtkTooltip *tooltip;
GdkDevice *device;
/* Get current tooltip for this display */
display = gtk_widget_get_display (widget);
tooltip = g_object_get_data (G_OBJECT (display),
"gdk-display-current-tooltip");
/* Check if keyboard mode is enabled at this moment */
if (!tooltip || !tooltip->keyboard_mode_enabled)
return;
device = gtk_get_current_event_device ();
if (device && gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
device = gdk_device_get_associated_device (device);
/* This function should be called by either a focus in event,
* or a key binding. In either case there should be a device.
*/
if (!device)
return;
if (tooltip->keyboard_widget)
g_object_unref (tooltip->keyboard_widget);
tooltip->keyboard_widget = g_object_ref (widget);
gdk_window_get_device_position (gtk_widget_get_window (widget),
device, &x, &y, NULL);
return_value = gtk_tooltip_run_requery (&widget, tooltip, &x, &y);
if (!return_value)
{
gtk_tooltip_hide_tooltip (tooltip);
return;
}
if (!tooltip->current_window)
{
if (gtk_widget_get_tooltip_window (widget))
tooltip->current_window = gtk_widget_get_tooltip_window (widget);
else
tooltip->current_window = GTK_WINDOW (GTK_TOOLTIP (tooltip)->window);
}
gtk_tooltip_show_tooltip (display);
}
void
_gtk_tooltip_focus_out (GtkWidget *widget)
{
GdkDisplay *display;
GtkTooltip *tooltip;
/* Get current tooltip for this display */
display = gtk_widget_get_display (widget);
tooltip = g_object_get_data (G_OBJECT (display),
"gdk-display-current-tooltip");
if (!tooltip || !tooltip->keyboard_mode_enabled)
return;
if (tooltip->keyboard_widget)
{
g_object_unref (tooltip->keyboard_widget);
tooltip->keyboard_widget = NULL;
}
gtk_tooltip_hide_tooltip (tooltip);
}
void
_gtk_tooltip_toggle_keyboard_mode (GtkWidget *widget)
{
GdkDisplay *display;
GtkTooltip *tooltip;
display = gtk_widget_get_display (widget);
tooltip = g_object_get_data (G_OBJECT (display),
"gdk-display-current-tooltip");
if (!tooltip)
{
tooltip = g_object_new (GTK_TYPE_TOOLTIP, NULL);
g_object_set_data_full (G_OBJECT (display),
"gdk-display-current-tooltip",
tooltip, g_object_unref);
g_signal_connect (display, "closed",
G_CALLBACK (gtk_tooltip_display_closed),
tooltip);
}
tooltip->keyboard_mode_enabled ^= 1;
if (tooltip->keyboard_mode_enabled)
{
tooltip->keyboard_widget = g_object_ref (widget);
_gtk_tooltip_focus_in (widget);
}
else
{
if (tooltip->keyboard_widget)
{
g_object_unref (tooltip->keyboard_widget);
tooltip->keyboard_widget = NULL;
}
gtk_tooltip_hide_tooltip (tooltip);
}
}
void
_gtk_tooltip_hide (GtkWidget *widget)
{
GtkWidget *toplevel;
GdkDisplay *display;
GtkTooltip *tooltip;
display = gtk_widget_get_display (widget);
tooltip = g_object_get_data (G_OBJECT (display),
"gdk-display-current-tooltip");
if (!tooltip || !GTK_TOOLTIP_VISIBLE (tooltip) || !tooltip->tooltip_widget)
return;
toplevel = gtk_widget_get_toplevel (widget);
if (widget == tooltip->tooltip_widget
|| gtk_widget_get_window (toplevel) == tooltip->toplevel_window)
gtk_tooltip_hide_tooltip (tooltip);
}
static gboolean
tooltips_enabled (GdkWindow *window)
{
gboolean enabled;
gboolean touchscreen;
GdkScreen *screen;
GtkSettings *settings;
screen = gdk_window_get_screen (window);
settings = gtk_settings_get_for_screen (screen);
g_object_get (settings,
"gtk-touchscreen-mode", &touchscreen,
"gtk-enable-tooltips", &enabled,
NULL);
return (!touchscreen && enabled);
}
void
_gtk_tooltip_handle_event (GdkEvent *event)
{
gint x, y;
gboolean return_value = FALSE;
GtkWidget *has_tooltip_widget = NULL;
GdkDisplay *display;
GtkTooltip *current_tooltip;
if (!tooltips_enabled (event->any.window))
return;
/* Returns coordinates relative to has_tooltip_widget's allocation. */
has_tooltip_widget = find_topmost_widget_coords_from_event (event, &x, &y);
display = gdk_window_get_display (event->any.window);
current_tooltip = g_object_get_data (G_OBJECT (display),
"gdk-display-current-tooltip");
if (current_tooltip)
{
gtk_tooltip_set_last_window (current_tooltip, event->any.window);
}
if (current_tooltip && current_tooltip->keyboard_mode_enabled)
{
has_tooltip_widget = current_tooltip->keyboard_widget;
if (!has_tooltip_widget)
return;
return_value = gtk_tooltip_run_requery (&has_tooltip_widget,
current_tooltip,
&x, &y);
if (!return_value)
gtk_tooltip_hide_tooltip (current_tooltip);
else
gtk_tooltip_start_delay (display);
return;
}
#ifdef DEBUG_TOOLTIP
if (has_tooltip_widget)
g_print ("%p (%s) at (%d, %d) %dx%d pointer: (%d, %d)\n",
has_tooltip_widget, gtk_widget_get_name (has_tooltip_widget),
has_tooltip_widget->allocation.x,
has_tooltip_widget->allocation.y,
has_tooltip_widget->allocation.width,
has_tooltip_widget->allocation.height,
x, y);
#endif /* DEBUG_TOOLTIP */
/* Always poll for a next motion event */
gdk_event_request_motions (&event->motion);
/* Hide the tooltip when there's no new tooltip widget */
if (!has_tooltip_widget)
{
if (current_tooltip)
gtk_tooltip_hide_tooltip (current_tooltip);
return;
}
switch (event->type)
{
case GDK_BUTTON_PRESS:
case GDK_2BUTTON_PRESS:
case GDK_3BUTTON_PRESS:
case GDK_KEY_PRESS:
case GDK_DRAG_ENTER:
case GDK_GRAB_BROKEN:
case GDK_SCROLL:
gtk_tooltip_hide_tooltip (current_tooltip);
break;
case GDK_MOTION_NOTIFY:
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
if (current_tooltip)
{
gboolean tip_area_set;
GdkRectangle tip_area;
gboolean hide_tooltip;
tip_area_set = current_tooltip->tip_area_set;
tip_area = current_tooltip->tip_area;
return_value = gtk_tooltip_run_requery (&has_tooltip_widget,
current_tooltip,
&x, &y);
/* Requested to be hidden? */
hide_tooltip = !return_value;
/* Leave notify should override the query function */
hide_tooltip = (event->type == GDK_LEAVE_NOTIFY);
/* Is the pointer above another widget now? */
if (GTK_TOOLTIP_VISIBLE (current_tooltip))
hide_tooltip |= has_tooltip_widget != current_tooltip->tooltip_widget;
/* Did the pointer move out of the previous "context area"? */
if (tip_area_set)
hide_tooltip |= (x <= tip_area.x
|| x >= tip_area.x + tip_area.width
|| y <= tip_area.y
|| y >= tip_area.y + tip_area.height);
if (hide_tooltip)
gtk_tooltip_hide_tooltip (current_tooltip);
else
gtk_tooltip_start_delay (display);
}
else
{
/* Need a new tooltip for this display */
current_tooltip = g_object_new (GTK_TYPE_TOOLTIP, NULL);
g_object_set_data_full (G_OBJECT (display),
"gdk-display-current-tooltip",
current_tooltip, g_object_unref);
g_signal_connect (display, "closed",
G_CALLBACK (gtk_tooltip_display_closed),
current_tooltip);
gtk_tooltip_set_last_window (current_tooltip, event->any.window);
gtk_tooltip_start_delay (display);
}
break;
default:
break;
}
}
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