244 lines
8.7 KiB
C
244 lines
8.7 KiB
C
/*
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Copyright (C) 2011-2012 Christian Dywan <christian@twotoasts.de>
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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See the file COPYING for the full license text.
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*/
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#include "katze/gtk3-compat.h"
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#if !GTK_CHECK_VERSION (3, 2, 0)
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static void
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sokoke_widget_set_pango_font_style (GtkWidget* widget,
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PangoStyle style)
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{
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/* Conveniently change the pango font style
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For some reason we need to reset if we actually want the normal style */
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if (style == PANGO_STYLE_NORMAL)
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gtk_widget_modify_font (widget, NULL);
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else
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{
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PangoFontDescription* font_description = pango_font_description_new ();
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pango_font_description_set_style (font_description, PANGO_STYLE_ITALIC);
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gtk_widget_modify_font (widget, font_description);
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pango_font_description_free (font_description);
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}
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}
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/* returns TRUE if the entry is currently showing its placeholder text */
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static gboolean
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sokoke_entry_is_showing_default (GtkEntry* entry)
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{
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gint showing_default = GPOINTER_TO_INT (
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g_object_get_data (G_OBJECT (entry), "sokoke_showing_default"));
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const gchar* text = gtk_entry_get_text (entry);
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const gchar* default_text = (const gchar*)g_object_get_data (
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G_OBJECT (entry), "sokoke_default_text");
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return showing_default && !g_strcmp0(text, default_text);
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}
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/* returns TRUE if the entry is not being used by the user to perform entry or
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hold data at a given moment */
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static gboolean
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sokoke_entry_is_idle (GtkEntry* entry)
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{
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const gchar* text = gtk_entry_get_text (entry);
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/* if the default is visible or the user has left the entry blank */
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return sokoke_entry_is_showing_default(entry) ||
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(text && !*text && !gtk_widget_has_focus (GTK_WIDGET (entry)));
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}
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static gboolean
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sokoke_on_entry_text_changed (GtkEntry* entry,
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GParamSpec* pspec,
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gpointer userdata);
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static void
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sokoke_hide_placeholder_text (GtkEntry* entry)
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{
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if(sokoke_entry_is_showing_default (entry))
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{
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g_signal_handlers_block_by_func (entry, sokoke_on_entry_text_changed, NULL);
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gtk_entry_set_text (entry, "");
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g_signal_handlers_unblock_by_func (entry, sokoke_on_entry_text_changed, NULL);
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}
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g_object_set_data (G_OBJECT (entry), "sokoke_showing_default",
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GINT_TO_POINTER (0));
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sokoke_widget_set_pango_font_style (GTK_WIDGET (entry),
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PANGO_STYLE_NORMAL);
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}
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static gboolean
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sokoke_on_entry_focus_in_event (GtkEntry* entry,
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GdkEventFocus* event,
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gpointer userdata)
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{
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sokoke_hide_placeholder_text (entry);
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return FALSE;
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}
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static void
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sokoke_show_placeholder_text (GtkEntry* entry)
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{
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/* no need to do work if the widget is unfocused with placeholder */
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if(sokoke_entry_is_showing_default (entry))
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return;
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/* no need to do work if the placeholder is already visible */
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const gchar* text = gtk_entry_get_text (entry);
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if (text && !*text)
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{
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const gchar* default_text = (const gchar*)g_object_get_data (
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G_OBJECT (entry), "sokoke_default_text");
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g_object_set_data (G_OBJECT (entry),
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"sokoke_showing_default", GINT_TO_POINTER (1));
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g_signal_handlers_block_by_func (entry, sokoke_on_entry_text_changed, NULL);
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gtk_entry_set_text (entry, default_text);
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g_signal_handlers_unblock_by_func (entry, sokoke_on_entry_text_changed, NULL);
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sokoke_widget_set_pango_font_style (GTK_WIDGET (entry),
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PANGO_STYLE_ITALIC);
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}
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}
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static void
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sokoke_on_entry_drag_leave (GtkEntry* entry,
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GdkDragContext* drag_context,
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guint timestamp,
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gpointer user_data)
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{
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sokoke_show_placeholder_text (entry);
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}
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static gboolean
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sokoke_on_entry_text_changed (GtkEntry* entry,
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GParamSpec* pspec,
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gpointer userdata)
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{
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if(sokoke_entry_is_idle (entry))
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{
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sokoke_show_placeholder_text (entry);
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}
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else
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{
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sokoke_hide_placeholder_text (entry);
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}
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return TRUE;
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}
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static gboolean
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sokoke_on_entry_focus_out_event (GtkEntry* entry,
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GdkEventFocus* event,
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gpointer userdata)
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{
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sokoke_show_placeholder_text (entry);
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return FALSE;
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}
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static gboolean
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sokoke_on_entry_drag_motion (GtkEntry* entry,
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GdkDragContext* drag_context,
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gint x,
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gint y,
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guint timestamp,
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gpointer user_data)
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{
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sokoke_hide_placeholder_text (entry);
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return FALSE;
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}
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static gboolean
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sokoke_on_entry_drag_drop (GtkEntry* entry,
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GdkDragContext* drag_context,
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gint x,
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gint y,
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guint timestamp,
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gpointer user_data)
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{
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sokoke_hide_placeholder_text (entry);
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return FALSE;
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}
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static void
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sokoke_on_entry_popup (GtkEntry *entry,
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GtkWidget *popup,
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gpointer user_data)
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{
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/* If the user selects paste in the popup, we should hide the default
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when the menu closes so it pastes into a clean entry */
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g_signal_connect_swapped (popup, "destroy", G_CALLBACK (
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sokoke_hide_placeholder_text), entry);
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}
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void
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gtk_entry_set_placeholder_text (GtkEntry* entry,
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const gchar* default_text)
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{
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/* Note: The default text initially overwrites any previous text */
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gchar* old_default_text = g_object_get_data (G_OBJECT (entry), "sokoke_default_text");
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g_object_set_data (G_OBJECT (entry), "sokoke_default_text", (gpointer)default_text);
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if (default_text == NULL)
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{
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g_object_set_data (G_OBJECT (entry), "sokoke_showing_default", GINT_TO_POINTER (0));
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g_signal_handlers_disconnect_by_func (entry,
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G_CALLBACK (sokoke_on_entry_drag_motion), NULL);
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g_signal_handlers_disconnect_by_func (entry,
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G_CALLBACK (sokoke_on_entry_focus_in_event), NULL);
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g_signal_handlers_disconnect_by_func (entry,
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G_CALLBACK (sokoke_on_entry_drag_leave), NULL);
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g_signal_handlers_disconnect_by_func (entry,
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G_CALLBACK (sokoke_on_entry_drag_drop), NULL);
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g_signal_handlers_disconnect_by_func (entry,
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G_CALLBACK (sokoke_on_entry_focus_out_event), NULL);
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g_signal_handlers_disconnect_by_func (entry,
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G_CALLBACK (sokoke_on_entry_text_changed), NULL);
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g_signal_handlers_disconnect_by_func (entry,
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G_CALLBACK (sokoke_on_entry_popup), NULL);
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}
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else if (old_default_text == NULL)
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{
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g_object_set_data (G_OBJECT (entry), "sokoke_showing_default", GINT_TO_POINTER (1));
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sokoke_widget_set_pango_font_style (GTK_WIDGET (entry), PANGO_STYLE_ITALIC);
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gtk_entry_set_text (entry, default_text);
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g_signal_connect (entry, "drag-motion",
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G_CALLBACK (sokoke_on_entry_drag_motion), NULL);
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g_signal_connect (entry, "focus-in-event",
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G_CALLBACK (sokoke_on_entry_focus_in_event), NULL);
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g_signal_connect (entry, "drag-leave",
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G_CALLBACK (sokoke_on_entry_drag_leave), NULL);
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g_signal_connect (entry, "drag-drop",
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G_CALLBACK (sokoke_on_entry_drag_drop), NULL);
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g_signal_connect (entry, "focus-out-event",
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G_CALLBACK (sokoke_on_entry_focus_out_event), NULL);
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g_signal_connect (entry, "notify::text",
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G_CALLBACK (sokoke_on_entry_text_changed), NULL);
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g_signal_connect (entry, "populate-popup",
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G_CALLBACK (sokoke_on_entry_popup), NULL);
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}
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else if (!gtk_widget_has_focus (GTK_WIDGET (entry)))
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{
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gint showing_default = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (entry), "sokoke_showing_default"));
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if (showing_default)
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{
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gtk_entry_set_text (entry, default_text);
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sokoke_widget_set_pango_font_style (GTK_WIDGET (entry), PANGO_STYLE_ITALIC);
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}
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}
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}
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const gchar*
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gtk_entry_get_placeholder_text (GtkEntry* entry)
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{
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return g_object_get_data (G_OBJECT (entry), "sokoke_default_text");
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}
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#endif
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