forked from AuroraMiddleware/gtk
label: Use gestures for event management
A multipress gesture takes care of link handling, and char/word/all selection mode on selectable labels. A drag gesture is used for both text selection and DnD checks on selectable labels.
This commit is contained in:
Carlos Garnacho
parent
26dff0d783
commit
8dcdec58eb
461
gtk/gtklabel.c
461
gtk/gtklabel.c
@ -229,6 +229,9 @@ struct _GtkLabelPrivate
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PangoAttrList *markup_attrs;
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PangoLayout *layout;
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GtkGesture *drag_gesture;
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GtkGesture *multipress_gesture;
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gchar *label;
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gchar *text;
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@ -375,10 +378,6 @@ static void gtk_label_unrealize (GtkWidget *widget);
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static void gtk_label_map (GtkWidget *widget);
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static void gtk_label_unmap (GtkWidget *widget);
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static gboolean gtk_label_button_press (GtkWidget *widget,
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GdkEventButton *event);
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static gboolean gtk_label_button_release (GtkWidget *widget,
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GdkEventButton *event);
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static gboolean gtk_label_motion (GtkWidget *widget,
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GdkEventMotion *event);
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static gboolean gtk_label_leave_notify (GtkWidget *widget,
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@ -482,6 +481,26 @@ static GtkLabelLink *gtk_label_get_current_link (GtkLabel *label);
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static void emit_activate_link (GtkLabel *label,
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GtkLabelLink *link);
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/* Event controller callbacks */
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static void gtk_label_multipress_gesture_pressed (GtkGestureMultiPress *gesture,
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gint n_press,
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gdouble x,
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gdouble y,
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GtkLabel *label);
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static void gtk_label_multipress_gesture_released (GtkGestureMultiPress *gesture,
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gint n_press,
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gdouble x,
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gdouble y,
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GtkLabel *label);
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static void gtk_label_drag_gesture_begin (GtkGestureDrag *gesture,
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gdouble start_x,
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gdouble start_y,
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GtkLabel *label);
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static void gtk_label_drag_gesture_update (GtkGestureDrag *gesture,
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gdouble offset_x,
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gdouble offset_y,
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GtkLabel *label);
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static GtkSizeRequestMode gtk_label_get_request_mode (GtkWidget *widget);
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static void gtk_label_get_preferred_width (GtkWidget *widget,
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gint *minimum_size,
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@ -557,8 +576,6 @@ gtk_label_class_init (GtkLabelClass *class)
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widget_class->unrealize = gtk_label_unrealize;
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widget_class->map = gtk_label_map;
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widget_class->unmap = gtk_label_unmap;
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widget_class->button_press_event = gtk_label_button_press;
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widget_class->button_release_event = gtk_label_button_release;
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widget_class->motion_notify_event = gtk_label_motion;
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widget_class->leave_notify_event = gtk_label_leave_notify;
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widget_class->hierarchy_changed = gtk_label_hierarchy_changed;
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@ -1258,6 +1275,27 @@ gtk_label_init (GtkLabel *label)
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priv->mnemonics_visible = TRUE;
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gtk_label_set_text (label, "");
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priv->drag_gesture = gtk_gesture_drag_new (GTK_WIDGET (label));
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g_signal_connect (priv->drag_gesture, "drag-begin",
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G_CALLBACK (gtk_label_drag_gesture_begin), label);
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g_signal_connect (priv->drag_gesture, "drag-update",
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G_CALLBACK (gtk_label_drag_gesture_update), label);
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gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (priv->drag_gesture), FALSE);
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gtk_gesture_single_set_exclusive (GTK_GESTURE_SINGLE (priv->drag_gesture), TRUE);
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gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (priv->drag_gesture), GDK_BUTTON_PRIMARY);
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gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (priv->drag_gesture),
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GTK_PHASE_BUBBLE);
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priv->multipress_gesture = gtk_gesture_multi_press_new (GTK_WIDGET (label));
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g_signal_connect (priv->multipress_gesture, "pressed",
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G_CALLBACK (gtk_label_multipress_gesture_pressed), label);
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g_signal_connect (priv->multipress_gesture, "released",
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G_CALLBACK (gtk_label_multipress_gesture_released), label);
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gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (priv->multipress_gesture), FALSE);
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gtk_gesture_single_set_exclusive (GTK_GESTURE_SINGLE (priv->multipress_gesture), TRUE);
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gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (priv->multipress_gesture),
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GTK_PHASE_BUBBLE);
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}
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@ -3132,6 +3170,9 @@ gtk_label_finalize (GObject *object)
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gtk_label_clear_links (label);
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g_free (priv->select_info);
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g_object_unref (priv->drag_gesture);
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g_object_unref (priv->multipress_gesture);
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G_OBJECT_CLASS (gtk_label_parent_class)->finalize (object);
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}
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@ -4665,49 +4706,61 @@ out:
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return FALSE;
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}
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static gboolean
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gtk_label_button_press (GtkWidget *widget,
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GdkEventButton *event)
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static void
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gtk_label_multipress_gesture_pressed (GtkGestureMultiPress *gesture,
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gint n_press,
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gdouble widget_x,
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gdouble widget_y,
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GtkLabel *label)
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{
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GtkLabel *label = GTK_LABEL (widget);
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GtkLabelPrivate *priv = label->priv;
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GtkLabelSelectionInfo *info = priv->select_info;
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gint index = 0;
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gint min, max;
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GtkWidget *widget = GTK_WIDGET (label);
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GdkEventSequence *sequence;
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const GdkEvent *event;
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guint button;
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if (info == NULL)
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return FALSE;
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{
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gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
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return;
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}
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button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture));
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sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
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event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
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gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
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if (info->active_link)
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{
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if (gdk_event_triggers_context_menu ((GdkEvent *) event))
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if (gdk_event_triggers_context_menu (event))
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{
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info->link_clicked = 1;
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gtk_label_do_popup (label, event);
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return TRUE;
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gtk_label_do_popup (label, (GdkEventButton*) event);
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return;
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}
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else if (event->button == GDK_BUTTON_PRIMARY)
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else if (button == GDK_BUTTON_PRIMARY)
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{
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info->link_clicked = 1;
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gtk_widget_queue_draw (widget);
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if (!info->selectable)
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return TRUE;
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return;
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}
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}
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if (!info->selectable)
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return FALSE;
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{
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gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
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return;
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}
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info->in_drag = FALSE;
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info->select_words = FALSE;
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if (gdk_event_triggers_context_menu ((GdkEvent *) event))
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{
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gtk_label_do_popup (label, event);
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return TRUE;
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}
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else if (event->button == GDK_BUTTON_PRIMARY)
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gtk_label_do_popup (label, (GdkEventButton*) event);
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else if (button == GDK_BUTTON_PRIMARY)
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{
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if (!gtk_widget_has_focus (widget))
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{
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@ -4716,118 +4769,55 @@ gtk_label_button_press (GtkWidget *widget,
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priv->in_click = FALSE;
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}
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if (event->type == GDK_3BUTTON_PRESS)
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{
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gtk_label_select_region_index (label, 0, strlen (priv->text));
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return TRUE;
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}
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if (event->type == GDK_2BUTTON_PRESS)
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if (n_press == 3)
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gtk_label_select_region_index (label, 0, strlen (priv->text));
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else if (n_press == 2)
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{
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info->select_words = TRUE;
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gtk_label_select_word (label);
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return TRUE;
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}
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get_layout_index (label, event->x, event->y, &index);
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min = MIN (info->selection_anchor, info->selection_end);
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max = MAX (info->selection_anchor, info->selection_end);
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if ((info->selection_anchor != info->selection_end) &&
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(event->state & GDK_SHIFT_MASK))
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{
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if (index > min && index < max)
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{
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/* truncate selection, but keep it as big as possible */
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if (index - min > max - index)
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max = index;
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else
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min = index;
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}
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else
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{
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/* extend (same as motion) */
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min = MIN (min, index);
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max = MAX (max, index);
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}
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/* ensure the anchor is opposite index */
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if (index == min)
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{
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gint tmp = min;
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min = max;
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max = tmp;
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}
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gtk_label_select_region_index (label, min, max);
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}
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else
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{
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if (event->type == GDK_3BUTTON_PRESS)
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gtk_label_select_region_index (label, 0, strlen (priv->text));
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else if (event->type == GDK_2BUTTON_PRESS)
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gtk_label_select_word (label);
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else if (min < max && min <= index && index <= max)
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{
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info->in_drag = TRUE;
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info->drag_start_x = event->x;
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info->drag_start_y = event->y;
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}
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else
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/* start a replacement */
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gtk_label_select_region_index (label, index, index);
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}
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return TRUE;
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}
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return FALSE;
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if (n_press >= 3)
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gtk_event_controller_reset (GTK_EVENT_CONTROLLER (gesture));
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}
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static gboolean
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gtk_label_button_release (GtkWidget *widget,
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GdkEventButton *event)
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static void
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gtk_label_multipress_gesture_released (GtkGestureMultiPress *gesture,
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gint n_press,
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gdouble x,
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gdouble y,
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GtkLabel *label)
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{
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GtkLabel *label = GTK_LABEL (widget);
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GtkLabelPrivate *priv = label->priv;
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GtkLabelSelectionInfo *info = priv->select_info;
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GdkEventSequence *sequence;
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gint index;
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if (info == NULL)
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return FALSE;
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return;
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sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
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if (!gtk_gesture_handles_sequence (GTK_GESTURE (gesture), sequence))
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return;
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if (n_press != 1)
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return;
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if (info->in_drag)
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{
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info->in_drag = 0;
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get_layout_index (label, event->x, event->y, &index);
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get_layout_index (label, x, y, &index);
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gtk_label_select_region_index (label, index, index);
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return FALSE;
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}
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if (event->button != GDK_BUTTON_PRIMARY)
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return FALSE;
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if (info->active_link &&
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info->selection_anchor == info->selection_end &&
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info->link_clicked)
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else if (info->active_link &&
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info->selection_anchor == info->selection_end &&
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info->link_clicked)
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{
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emit_activate_link (label, info->active_link);
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info->link_clicked = 0;
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return TRUE;
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}
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/* The goal here is to return TRUE iff we ate the
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* button press to start selecting.
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*/
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if (info->selectable)
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return TRUE;
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return FALSE;
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}
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static void
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@ -4909,6 +4899,170 @@ drag_begin_cb (GtkWidget *widget,
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}
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}
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static void
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gtk_label_drag_gesture_begin (GtkGestureDrag *gesture,
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gdouble start_x,
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gdouble start_y,
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GtkLabel *label)
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{
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GtkLabelPrivate *priv = label->priv;
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GtkLabelSelectionInfo *info = priv->select_info;
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GdkModifierType state_mask;
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GdkEventSequence *sequence;
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const GdkEvent *event;
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gint min, max, index;
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if (!info)
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{
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gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
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return;
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}
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get_layout_index (label, start_x, start_y, &index);
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min = MIN (info->selection_anchor, info->selection_end);
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max = MAX (info->selection_anchor, info->selection_end);
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sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
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event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
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gdk_event_get_state (event, &state_mask);
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if ((info->selection_anchor != info->selection_end) &&
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(state_mask & GDK_SHIFT_MASK))
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{
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if (index > min && index < max)
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{
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/* truncate selection, but keep it as big as possible */
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if (index - min > max - index)
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max = index;
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else
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min = index;
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}
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else
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{
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/* extend (same as motion) */
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min = MIN (min, index);
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max = MAX (max, index);
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}
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/* ensure the anchor is opposite index */
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if (index == min)
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{
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gint tmp = min;
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min = max;
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max = tmp;
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}
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gtk_label_select_region_index (label, min, max);
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}
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else
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{
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if (min < max && min <= index && index <= max)
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{
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info->in_drag = TRUE;
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info->drag_start_x = start_x;
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info->drag_start_y = start_y;
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}
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else
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/* start a replacement */
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gtk_label_select_region_index (label, index, index);
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}
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}
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static void
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gtk_label_drag_gesture_update (GtkGestureDrag *gesture,
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gdouble offset_x,
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gdouble offset_y,
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GtkLabel *label)
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{
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GtkLabelPrivate *priv = label->priv;
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GtkLabelSelectionInfo *info = priv->select_info;
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GtkWidget *widget = GTK_WIDGET (label);
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GdkEventSequence *sequence;
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gdouble x, y;
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gint index;
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if (info == NULL || !info->selectable)
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return;
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sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
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gtk_gesture_get_point (GTK_GESTURE (gesture), sequence, &x, &y);
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if (info->in_drag)
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{
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if (gtk_drag_check_threshold (widget,
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info->drag_start_x,
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info->drag_start_y,
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x, y))
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{
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GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
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const GdkEvent *event;
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event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
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gtk_target_list_add_text_targets (target_list, 0);
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g_signal_connect (widget, "drag-begin",
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G_CALLBACK (drag_begin_cb), NULL);
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gtk_drag_begin_with_coordinates (widget, target_list,
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GDK_ACTION_COPY,
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1, (GdkEvent*) event,
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info->drag_start_x,
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info->drag_start_y);
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info->in_drag = FALSE;
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gtk_target_list_unref (target_list);
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}
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}
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else
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{
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get_layout_index (label, x, y, &index);
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if (index != info->selection_anchor)
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gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
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if (info->select_words)
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{
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gint min, max;
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gint old_min, old_max;
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gint anchor, end;
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min = gtk_label_move_backward_word (label, index);
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max = gtk_label_move_forward_word (label, index);
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anchor = info->selection_anchor;
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end = info->selection_end;
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old_min = MIN (anchor, end);
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old_max = MAX (anchor, end);
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if (min < old_min)
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{
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anchor = min;
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end = old_max;
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}
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else if (old_max < max)
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{
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anchor = max;
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end = old_min;
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}
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else if (anchor == old_min)
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{
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if (anchor != min)
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anchor = max;
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}
|
||||
else
|
||||
{
|
||||
if (anchor != max)
|
||||
anchor = min;
|
||||
}
|
||||
|
||||
gtk_label_select_region_index (label, anchor, end);
|
||||
}
|
||||
else
|
||||
gtk_label_select_region_index (label, info->selection_anchor, index);
|
||||
}
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gtk_label_motion (GtkWidget *widget,
|
||||
GdkEventMotion *event)
|
||||
@ -4965,86 +5119,7 @@ gtk_label_motion (GtkWidget *widget,
|
||||
}
|
||||
}
|
||||
|
||||
if (!info->selectable)
|
||||
return FALSE;
|
||||
|
||||
if ((event->state & GDK_BUTTON1_MASK) == 0)
|
||||
return FALSE;
|
||||
|
||||
if (info->in_drag)
|
||||
{
|
||||
if (gtk_drag_check_threshold (widget,
|
||||
info->drag_start_x,
|
||||
info->drag_start_y,
|
||||
event->x, event->y))
|
||||
{
|
||||
GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
|
||||
|
||||
gtk_target_list_add_text_targets (target_list, 0);
|
||||
|
||||
g_signal_connect (widget, "drag-begin",
|
||||
G_CALLBACK (drag_begin_cb), NULL);
|
||||
gtk_drag_begin_with_coordinates (widget, target_list,
|
||||
GDK_ACTION_COPY,
|
||||
1, (GdkEvent *)event,
|
||||
info->drag_start_x,
|
||||
info->drag_start_y);
|
||||
|
||||
info->in_drag = FALSE;
|
||||
|
||||
gtk_target_list_unref (target_list);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
gint x, y;
|
||||
|
||||
gdk_window_get_device_position (info->window, event->device, &x, &y, NULL);
|
||||
get_layout_index (label, x, y, &index);
|
||||
|
||||
if (info->select_words)
|
||||
{
|
||||
gint min, max;
|
||||
gint old_min, old_max;
|
||||
gint anchor, end;
|
||||
|
||||
min = gtk_label_move_backward_word (label, index);
|
||||
max = gtk_label_move_forward_word (label, index);
|
||||
|
||||
anchor = info->selection_anchor;
|
||||
end = info->selection_end;
|
||||
|
||||
old_min = MIN (anchor, end);
|
||||
old_max = MAX (anchor, end);
|
||||
|
||||
if (min < old_min)
|
||||
{
|
||||
anchor = min;
|
||||
end = old_max;
|
||||
}
|
||||
else if (old_max < max)
|
||||
{
|
||||
anchor = max;
|
||||
end = old_min;
|
||||
}
|
||||
else if (anchor == old_min)
|
||||
{
|
||||
if (anchor != min)
|
||||
anchor = max;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (anchor != max)
|
||||
anchor = min;
|
||||
}
|
||||
|
||||
gtk_label_select_region_index (label, anchor, end);
|
||||
}
|
||||
else
|
||||
gtk_label_select_region_index (label, info->selection_anchor, index);
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
return GTK_WIDGET_CLASS (gtk_label_parent_class)->motion_notify_event (widget, event);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
|
||||
Loading…
Reference in New Issue
Block a user