83e3008d35
Wed Feb 18 02:58:50 1998 Tim Janik <timj@gimp.org> * gtk/gtktooltips.h: new functions gtk_tooltips_data_get and gtk_tooltips_set_tip, gtk_tooltips_set_tips is discouraged now. (_GtkTooltips): removed some fields that were never used. changed boolean fields to one bit size, to pack together with the delay field. (_GtkTooltipsData): added tip_private, renamed tips_text to tip_text. * gtk/gtktooltips.c: (gtk_tooltips_data_get): new function to retrive the _GtkTooltipsData structure of a widget. (gtk_tooltips_set_tip): new function for more extensible tooltips settings than gtk_tooltips_set_tips which is discuraged now. removed a bug that caused a stale object_data key to a _GtkTooltipsData structure. removed a bug that caused tips falsly to come up for a grab widget on widgets where events were grabbed from.
640 lines
17 KiB
C
640 lines
17 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include "gtkmain.h"
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#include "gtkwidget.h"
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#include "gtkwindow.h"
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#include "gtksignal.h"
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#include "gtkstyle.h"
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#include "gtktooltips.h"
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#define DEFAULT_DELAY 500 /* Default delay in ms */
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static void gtk_tooltips_class_init (GtkTooltipsClass *klass);
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static void gtk_tooltips_init (GtkTooltips *tooltips);
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static void gtk_tooltips_destroy (GtkObject *object);
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static gint gtk_tooltips_event_handler (GtkWidget *widget,
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GdkEvent *event);
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static void gtk_tooltips_widget_unmap (GtkWidget *widget,
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gpointer data);
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static void gtk_tooltips_widget_remove (GtkWidget *widget,
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gpointer data);
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static void gtk_tooltips_set_active_widget (GtkTooltips *tooltips,
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GtkWidget *widget);
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static gint gtk_tooltips_widget_visible (GtkWidget *widget);
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static gint gtk_tooltips_timeout (gpointer data);
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static void gtk_tooltips_create_window (GtkTooltips *tooltips);
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static void gtk_tooltips_draw_tips (GtkTooltips *tooltips);
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static GtkDataClass *parent_class;
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static const gchar *tooltips_data_key = "_GtkTooltipsData";
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guint
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gtk_tooltips_get_type ()
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{
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static guint tooltips_type = 0;
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if (!tooltips_type)
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{
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GtkTypeInfo tooltips_info =
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{
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"GtkTooltips",
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sizeof (GtkTooltips),
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sizeof (GtkTooltipsClass),
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(GtkClassInitFunc) gtk_tooltips_class_init,
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(GtkObjectInitFunc) gtk_tooltips_init,
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(GtkArgSetFunc) NULL,
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(GtkArgGetFunc) NULL,
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};
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tooltips_type = gtk_type_unique (gtk_data_get_type (), &tooltips_info);
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}
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return tooltips_type;
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}
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static void
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gtk_tooltips_class_init (GtkTooltipsClass *class)
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{
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GtkObjectClass *object_class;
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object_class = (GtkObjectClass*) class;
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parent_class = gtk_type_class (gtk_data_get_type ());
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object_class->destroy = gtk_tooltips_destroy;
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}
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static void
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gtk_tooltips_init (GtkTooltips *tooltips)
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{
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tooltips->enabled = TRUE;
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tooltips->delay = DEFAULT_DELAY;
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tooltips->widget_list = NULL;
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tooltips->gc = NULL;
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tooltips->foreground = NULL;
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tooltips->background = NULL;
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tooltips->tip_window = NULL;
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}
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GtkTooltips *
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gtk_tooltips_new ()
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{
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return gtk_type_new (gtk_tooltips_get_type ());
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}
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void
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gtk_tooltips_free_string (gpointer data, gpointer user_data)
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{
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if (data)
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g_free (data);
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}
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static void
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gtk_tooltips_destroy_data (GtkTooltipsData *tooltipsdata)
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{
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g_free (tooltipsdata->tip_text);
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g_free (tooltipsdata->tip_private);
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g_list_foreach (tooltipsdata->row, gtk_tooltips_free_string, 0);
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if (tooltipsdata->row)
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g_list_free (tooltipsdata->row);
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gtk_signal_disconnect_by_data (GTK_OBJECT (tooltipsdata->widget),
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(gpointer) tooltipsdata);
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gtk_object_remove_data (GTK_OBJECT (tooltipsdata->widget), tooltips_data_key);
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gtk_widget_unref (tooltipsdata->widget);
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g_free (tooltipsdata);
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}
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static void
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gtk_tooltips_destroy (GtkObject *object)
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{
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GtkTooltips *tooltips = GTK_TOOLTIPS (object);
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GList *current;
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GtkTooltipsData *tooltipsdata;
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g_return_if_fail (tooltips != NULL);
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if (tooltips->timer_active == TRUE)
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{
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tooltips->timer_active = FALSE;
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gtk_timeout_remove (tooltips->timer_tag);
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}
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if (tooltips->widget_list != NULL)
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{
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current = g_list_first (tooltips->widget_list);
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while (current != NULL)
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{
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tooltipsdata = (GtkTooltipsData*) current->data;
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current = current->next;
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gtk_tooltips_widget_remove (tooltipsdata->widget, tooltipsdata);
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}
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}
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if (tooltips->tip_window != NULL)
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{
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gtk_widget_destroy (tooltips->tip_window);
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gtk_widget_unref (tooltips->tip_window);
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tooltips->tip_window = NULL;
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}
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if (tooltips->gc != NULL)
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{
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gdk_gc_destroy (tooltips->gc);
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tooltips->gc = NULL;
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}
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}
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static void
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gtk_tooltips_create_window (GtkTooltips *tooltips)
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{
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tooltips->tip_window = gtk_window_new (GTK_WINDOW_POPUP);
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gtk_widget_ref (tooltips->tip_window);
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gtk_window_set_policy (GTK_WINDOW (tooltips->tip_window), FALSE, FALSE, TRUE);
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gtk_widget_realize (tooltips->tip_window);
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}
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static void
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gtk_tooltips_layout_text (GtkTooltips *tooltips, GtkTooltipsData *data)
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{
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gchar *row_end, *text, *row_text, *break_pos;
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gint i, row_width, window_width = 0;
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size_t len;
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if (tooltips->tip_window == NULL)
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gtk_tooltips_create_window (tooltips);
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g_list_foreach (data->row, gtk_tooltips_free_string, 0);
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if (data->row)
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g_list_free (data->row);
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data->row = 0;
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data->font = tooltips->tip_window->style->font;
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data->width = 0;
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text = data->tip_text;
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if (!text)
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return;
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while (*text)
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{
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row_end = strchr (text, '\n');
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if (!row_end)
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row_end = strchr (text, '\0');
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len = row_end - text + 1;
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row_text = g_new(gchar, len);
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memcpy (row_text, text, len - 1);
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row_text[len - 1] = '\0';
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/* now either adjust the window's width or shorten the row until
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it fits in the window */
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while (1)
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{
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row_width = gdk_string_width (data->font, row_text);
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if (!window_width)
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{
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/* make an initial guess at window's width: */
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if (row_width > gdk_screen_width () / 4)
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window_width = gdk_screen_width () / 4;
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else
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window_width = row_width;
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}
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if (row_width <= window_width)
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break;
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if (strchr (row_text, ' '))
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{
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/* the row is currently too wide, but we have blanks in
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the row so we can break it into smaller pieces */
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gint avg_width = row_width / strlen (row_text);
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i = window_width;
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if (avg_width)
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i /= avg_width;
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if ((size_t) i >= len)
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i = len - 1;
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break_pos = strchr (row_text + i, ' ');
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if (!break_pos)
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{
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break_pos = row_text + i;
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while (*--break_pos != ' ');
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}
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*break_pos = '\0';
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}
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else
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{
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/* we can't break this row into any smaller pieces, so
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we have no choice but to widen the window: */
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window_width = row_width;
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break;
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}
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}
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if (row_width > data->width)
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data->width = row_width;
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data->row = g_list_append (data->row, row_text);
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text += strlen (row_text);
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if (!*text)
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break;
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if (text[0] == '\n' && text[1])
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/* end of paragraph and there is more text to come */
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data->row = g_list_append (data->row, 0);
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++text; /* skip blank or newline */
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}
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data->width += 8; /* leave some border */
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}
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void
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gtk_tooltips_enable (GtkTooltips *tooltips)
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{
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g_return_if_fail (tooltips != NULL);
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tooltips->enabled = TRUE;
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}
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void
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gtk_tooltips_disable (GtkTooltips *tooltips)
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{
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g_return_if_fail (tooltips != NULL);
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tooltips->enabled = FALSE;
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if (tooltips->timer_active == TRUE)
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{
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gtk_timeout_remove (tooltips->timer_tag);
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tooltips->timer_active = FALSE;
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}
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if (tooltips->active_widget != NULL)
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{
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if (tooltips->tip_window != NULL)
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gtk_widget_hide (tooltips->tip_window);
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tooltips->active_widget = NULL;
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}
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}
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void
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gtk_tooltips_set_delay (GtkTooltips *tooltips,
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gint delay)
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{
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g_return_if_fail (tooltips != NULL);
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tooltips->delay = delay;
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}
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GtkTooltipsData*
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gtk_tooltips_data_get (GtkWidget *widget)
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{
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g_return_val_if_fail (widget != NULL, NULL);
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return gtk_object_get_data ((GtkObject*) widget, tooltips_data_key);
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}
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void
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gtk_tooltips_set_tip (GtkTooltips *tooltips,
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GtkWidget *widget,
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const gchar *tip_text,
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const gchar *tip_private)
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{
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GtkTooltipsData *tooltipsdata;
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g_return_if_fail (tooltips != NULL);
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g_return_if_fail (GTK_IS_TOOLTIPS (tooltips));
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g_return_if_fail (widget != NULL);
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tooltipsdata = gtk_tooltips_data_get (widget);
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if (tooltipsdata)
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gtk_tooltips_widget_remove (tooltipsdata->widget, tooltipsdata);
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if (!tip_text)
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return;
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tooltipsdata = g_new0 (GtkTooltipsData, 1);
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if (tooltipsdata != NULL)
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{
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tooltipsdata->tooltips = tooltips;
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tooltipsdata->widget = widget;
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gtk_widget_ref (widget);
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tooltipsdata->tip_text = g_strdup (tip_text);
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tooltipsdata->tip_private = g_strdup (tip_private);
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gtk_tooltips_layout_text (tooltips, tooltipsdata);
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tooltips->widget_list = g_list_append (tooltips->widget_list,
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tooltipsdata);
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gtk_signal_connect_after(GTK_OBJECT (widget), "event",
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(GtkSignalFunc) gtk_tooltips_event_handler,
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(gpointer) tooltipsdata);
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gtk_object_set_data (GTK_OBJECT (widget), tooltips_data_key,
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(gpointer) tooltipsdata);
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gtk_signal_connect (GTK_OBJECT (widget), "unmap",
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(GtkSignalFunc) gtk_tooltips_widget_unmap,
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(gpointer) tooltipsdata);
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gtk_signal_connect (GTK_OBJECT (widget), "unrealize",
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(GtkSignalFunc) gtk_tooltips_widget_unmap,
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(gpointer) tooltipsdata);
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gtk_signal_connect (GTK_OBJECT (widget), "destroy",
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(GtkSignalFunc) gtk_tooltips_widget_remove,
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(gpointer) tooltipsdata);
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}
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}
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void
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gtk_tooltips_set_colors (GtkTooltips *tooltips,
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GdkColor *background,
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GdkColor *foreground)
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{
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g_return_if_fail (tooltips != NULL);
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if (background != NULL)
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tooltips->foreground = foreground;
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if (foreground != NULL)
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tooltips->background = background;
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}
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static void
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gtk_tooltips_draw_tips (GtkTooltips * tooltips)
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{
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GtkWidget *widget;
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GtkStyle *style;
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gint gap, x, y, w, h, scr_w, scr_h, baseline_skip;
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GtkTooltipsData *data;
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GList *el;
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if (tooltips->tip_window == NULL)
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{
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gtk_tooltips_create_window (tooltips);
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}
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else
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gtk_widget_hide (tooltips->tip_window);
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style = tooltips->tip_window->style;
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widget = tooltips->active_widget->widget;
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scr_w = gdk_screen_width ();
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scr_h = gdk_screen_height ();
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data = tooltips->active_widget;
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if (data->font != style->font)
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gtk_tooltips_layout_text (tooltips, data);
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gap = (style->font->ascent + style->font->descent) / 4;
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if (gap < 2)
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gap = 2;
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baseline_skip = style->font->ascent + style->font->descent + gap;
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w = data->width;
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h = 8 - gap;
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for (el = data->row; el; el = el->next)
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if (el->data)
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h += baseline_skip;
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else
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h += baseline_skip / 2;
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if (h < 8)
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h = 8;
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gdk_window_get_pointer (NULL, &x, NULL, NULL);
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gdk_window_get_origin (widget->window, NULL, &y);
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x -= ((w >> 1) + 4);
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if ((x + w) > scr_w)
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x -= (x + w) - scr_w;
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else if (x < 0)
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x = 0;
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if ((y + h + widget->allocation.height + 4) > scr_h)
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y = y - h - 4;
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else
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y = y + widget->allocation.height + 4;
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gtk_widget_set_usize (tooltips->tip_window, w + 1, h + 1);
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gtk_widget_popup (tooltips->tip_window, x, y);
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if (tooltips->gc == NULL)
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tooltips->gc = gdk_gc_new (tooltips->tip_window->window);
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if (tooltips->background != NULL)
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{
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gdk_gc_set_foreground (tooltips->gc, tooltips->background);
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gdk_gc_set_background (tooltips->gc, tooltips->foreground);
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}
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else
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{
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gdk_gc_set_foreground (tooltips->gc, &style->bg[GTK_STATE_NORMAL]);
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gdk_gc_set_background (tooltips->gc, &style->fg[GTK_STATE_NORMAL]);
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}
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gdk_gc_set_font (tooltips->gc, style->font);
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gdk_draw_rectangle (tooltips->tip_window->window, tooltips->gc, TRUE, 0, 0, w, h);
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if (tooltips->foreground != NULL)
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{
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gdk_gc_set_foreground (tooltips->gc, tooltips->foreground);
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gdk_gc_set_background (tooltips->gc, tooltips->background);
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}
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else
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{
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gdk_gc_set_foreground (tooltips->gc, &style->fg[GTK_STATE_NORMAL]);
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gdk_gc_set_background (tooltips->gc, &style->bg[GTK_STATE_NORMAL]);
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}
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gdk_draw_rectangle (tooltips->tip_window->window, tooltips->gc, FALSE, 0, 0, w, h);
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y = style->font->ascent + 4;
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for (el = data->row; el; el = el->next)
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{
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if (el->data)
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{
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gdk_draw_string (tooltips->tip_window->window, style->font,
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tooltips->gc, 4, y, el->data);
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y += baseline_skip;
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}
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else
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y += baseline_skip / 2;
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}
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}
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static gint
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gtk_tooltips_timeout (gpointer data)
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{
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GtkTooltips *tooltips = (GtkTooltips *) data;
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if (tooltips->active_widget != NULL &&
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GTK_WIDGET_DRAWABLE (tooltips->active_widget->widget))
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gtk_tooltips_draw_tips (tooltips);
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return FALSE;
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}
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static gint
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gtk_tooltips_widget_visible (GtkWidget *widget)
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{
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GtkWidget *current;
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current = widget;
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while (current != NULL)
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{
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if (!GTK_WIDGET_MAPPED (current) || !GTK_WIDGET_REALIZED (current))
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return FALSE;
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current = current->parent;
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}
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return TRUE;
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}
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static void
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gtk_tooltips_set_active_widget (GtkTooltips *tooltips,
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GtkWidget *widget)
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{
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GtkTooltipsData *tooltipsdata;
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GList *current;
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|
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current = g_list_first (tooltips->widget_list);
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tooltips->active_widget = NULL;
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|
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while (current != NULL)
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{
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tooltipsdata = (GtkTooltipsData*) current->data;
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if (widget == tooltipsdata->widget &&
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gtk_tooltips_widget_visible (tooltipsdata->widget) == TRUE)
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{
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tooltips->active_widget = tooltipsdata;
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return;
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}
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|
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current = current->next;
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}
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}
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|
|
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static gint
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|
gtk_tooltips_event_handler (GtkWidget *widget,
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|
GdkEvent *event)
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|
{
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|
GtkTooltips *tooltips;
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GtkTooltipsData *old_widget;
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|
GtkWidget *event_widget;
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|
gint returnval = FALSE;
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|
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old_widget = gtk_tooltips_data_get (widget);
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tooltips = old_widget->tooltips;
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event_widget = gtk_get_event_widget (event);
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|
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if (tooltips->enabled == FALSE ||
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event_widget != widget)
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return returnval;
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|
|
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if ((event->type == GDK_LEAVE_NOTIFY || event->type == GDK_ENTER_NOTIFY) &&
|
|
event->crossing.detail == GDK_NOTIFY_INFERIOR)
|
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return returnval;
|
|
|
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if (event->type == GDK_LEAVE_NOTIFY)
|
|
{
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|
if (tooltips->timer_active == TRUE)
|
|
{
|
|
gtk_timeout_remove (tooltips->timer_tag);
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tooltips->timer_active = FALSE;
|
|
}
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if (tooltips->tip_window != NULL)
|
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gtk_widget_hide (tooltips->tip_window);
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|
tooltips->active_widget = NULL;
|
|
}
|
|
else if (event->type == GDK_MOTION_NOTIFY || event->type == GDK_ENTER_NOTIFY)
|
|
{
|
|
old_widget = tooltips->active_widget;
|
|
|
|
gtk_tooltips_set_active_widget (tooltips, widget);
|
|
|
|
if (old_widget != tooltips->active_widget)
|
|
{
|
|
if (tooltips->timer_active == TRUE)
|
|
{
|
|
gtk_timeout_remove (tooltips->timer_tag);
|
|
tooltips->timer_active = FALSE;
|
|
}
|
|
if (tooltips->active_widget != NULL)
|
|
{
|
|
if (tooltips->tip_window != NULL)
|
|
gtk_widget_hide (tooltips->tip_window);
|
|
|
|
tooltips->timer_tag = gtk_timeout_add (tooltips->delay,
|
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gtk_tooltips_timeout, (gpointer) tooltips);
|
|
|
|
tooltips->timer_active = TRUE;
|
|
}
|
|
}
|
|
else if (tooltips->active_widget == NULL)
|
|
{
|
|
if (tooltips->tip_window != NULL)
|
|
gtk_widget_hide (tooltips->tip_window);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (tooltips->tip_window != NULL)
|
|
gtk_widget_hide (tooltips->tip_window);
|
|
}
|
|
|
|
return returnval;
|
|
}
|
|
|
|
static void
|
|
gtk_tooltips_widget_unmap (GtkWidget *widget,
|
|
gpointer data)
|
|
{
|
|
GtkTooltipsData *tooltipsdata = (GtkTooltipsData *)data;
|
|
GtkTooltips *tooltips = tooltipsdata->tooltips;
|
|
|
|
if (tooltips->active_widget &&
|
|
(tooltips->active_widget->widget == widget))
|
|
{
|
|
if (tooltips->tip_window != NULL)
|
|
gtk_widget_hide (tooltips->tip_window);
|
|
tooltips->active_widget = NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_tooltips_widget_remove (GtkWidget *widget,
|
|
gpointer data)
|
|
{
|
|
GtkTooltipsData *tooltipsdata = (GtkTooltipsData*) data;
|
|
GtkTooltips *tooltips = tooltipsdata->tooltips;
|
|
|
|
gtk_tooltips_widget_unmap (widget, data);
|
|
tooltips->widget_list = g_list_remove (tooltips->widget_list,
|
|
tooltipsdata);
|
|
gtk_tooltips_destroy_data (tooltipsdata);
|
|
}
|