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gtk2/gtk/gtktooltip.c
Benjamin Otte c7e5d0c63d tooltip: Use the actual size of the window we're going to show 
It's easy by realizing the window first.

Don't try to guess the alorithm used by gtkwindow.c for sizing the
window, it might not be what we expect.
2011-04-27 00:27:29 +02:00

1639 lines
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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 "gtkhbox.h"
#include "gtkalignment.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 void gtk_tooltip_window_style_updated (GtkTooltip *tooltip);
static gboolean gtk_tooltip_paint_window (GtkTooltip *tooltip,
cairo_t *cr);
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;
GtkBorder padding, border;
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;
tooltip->window = g_object_ref (gtk_window_new (GTK_WINDOW_POPUP));
gtk_window_set_type_hint (GTK_WINDOW (tooltip->window),
GDK_WINDOW_TYPE_HINT_TOOLTIP);
gtk_widget_set_app_paintable (tooltip->window, TRUE);
gtk_window_set_resizable (GTK_WINDOW (tooltip->window), FALSE);
gtk_widget_set_name (tooltip->window, "gtk-tooltip");
g_signal_connect (tooltip->window, "hide",
G_CALLBACK (gtk_tooltip_window_hide), tooltip);
context = gtk_widget_get_style_context (tooltip->window);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOOLTIP);
gtk_style_context_get_padding (context, 0, &padding);
gtk_style_context_get_border (context, 0, &border);
tooltip->alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0);
gtk_alignment_set_padding (GTK_ALIGNMENT (tooltip->alignment),
border.top + padding.top,
border.bottom + padding.bottom,
border.left + padding.left,
border.right + padding.right);
gtk_container_add (GTK_CONTAINER (tooltip->window), tooltip->alignment);
gtk_widget_show (tooltip->alignment);
g_signal_connect_swapped (tooltip->window, "style-updated",
G_CALLBACK (gtk_tooltip_window_style_updated), tooltip);
g_signal_connect_swapped (tooltip->window, "draw",
G_CALLBACK (gtk_tooltip_paint_window), tooltip);
tooltip->box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, padding.left);
gtk_container_add (GTK_CONTAINER (tooltip->alignment), tooltip->box);
gtk_widget_show (tooltip->box);
tooltip->image = gtk_image_new ();
gtk_box_pack_start (GTK_BOX (tooltip->box), tooltip->image,
FALSE, FALSE, 0);
tooltip->label = gtk_label_new ("");
gtk_label_set_line_wrap (GTK_LABEL (tooltip->label), TRUE);
gtk_box_pack_start (GTK_BOX (tooltip->box), tooltip->label,
FALSE, FALSE, 0);
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
gtk_tooltip_window_style_updated (GtkTooltip *tooltip)
{
GtkStyleContext *context;
GtkBorder padding, border;
context = gtk_widget_get_style_context (tooltip->window);
gtk_style_context_get_padding (context, 0, &padding);
gtk_style_context_get_border (context, 0, &border);
gtk_alignment_set_padding (GTK_ALIGNMENT (tooltip->alignment),
border.top + padding.top,
border.bottom + padding.bottom,
border.left + padding.left,
border.right + padding.right);
gtk_box_set_spacing (GTK_BOX (tooltip->box), padding.left);
gtk_widget_queue_draw (tooltip->window);
}
static gboolean
gtk_tooltip_paint_window (GtkTooltip *tooltip,
cairo_t *cr)
{
GtkStyleContext *context;
context = gtk_widget_get_style_context (tooltip->window);
gtk_render_background (context, cr, 0, 0,
gtk_widget_get_allocated_width (tooltip->window),
gtk_widget_get_allocated_height (tooltip->window));
gtk_render_frame (context, cr, 0, 0,
gtk_widget_get_allocated_width (tooltip->window),
gtk_widget_get_allocated_height (tooltip->window));
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:
gtk_tooltip_hide_tooltip (current_tooltip);
break;
case GDK_MOTION_NOTIFY:
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
case GDK_SCROLL:
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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