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Fix mutli-selection-dnd from the search view to the play list
* Add a mutli-selection capable TreeView class. * Extract the SearchView class from the UserInterface Class.
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|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| /* | ||
| * hum_multi_selection_tree_view.vala | ||
| * | ||
| * This file is part of Hum, the low calorie music manager. | ||
| * | ||
| * Copyright (C) 2010 by Simon Wenner <simon@wenner.ch> | ||
| * | ||
| * Hum is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * Hum is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with Hum; if not, write to the Free Software | ||
| * Foundation, Inc., 51 Franklin St, Fifth Floor, | ||
| * Boston, MA 02110-1301 USA | ||
| */ | ||
|
|
||
| using Gtk; | ||
|
|
||
| namespace Hum | ||
| { | ||
| public class MultiSelectionTreeView : Gtk.TreeView | ||
| { | ||
| private Gtk.TreePath? blocked_selection_path = null; | ||
|
|
||
| public MultiSelectionTreeView () | ||
| { | ||
| /* Allow multiple selections */ | ||
| Gtk.TreeSelection selection = this.get_selection (); | ||
| selection.set_mode (Gtk.SelectionMode.MULTIPLE); | ||
|
|
||
| this.button_press_event.connect (on_button_press_event); | ||
| this.button_release_event.connect (on_button_release_event); | ||
| } | ||
|
|
||
| private bool on_button_press_event (Gdk.EventButton event) | ||
| { | ||
| /* Left mouse click */ | ||
| if (event.button == 1) | ||
| return block_selection (event); | ||
|
|
||
| /* not handled */ | ||
| return false; | ||
| } | ||
|
|
||
| private bool block_selection (Gdk.EventButton event) | ||
| { | ||
| /* Here we intercept mouse clicks on selected items, so that we can | ||
| drag multiple items without the click selecting only one item. */ | ||
| Gtk.TreePath? path; | ||
| bool valid = this.get_path_at_pos ((int)event.x, (int)event.y, out path, null, null, null); | ||
| Gtk.TreeSelection selection = this.get_selection (); | ||
| if (valid && | ||
| event.type == Gdk.EventType.BUTTON_PRESS && | ||
| ! (bool)(event.state & (Gdk.ModifierType.CONTROL_MASK | Gdk.ModifierType.SHIFT_MASK)) && | ||
| selection.path_is_selected (path)) | ||
| { | ||
| /* Disable the selection */ | ||
| selection.set_select_function ((sel, mod, path, cursel) => { return false; }); | ||
| this.blocked_selection_path = path; | ||
| } | ||
|
|
||
| /* not handled */ | ||
| return false; | ||
| } | ||
|
|
||
| private bool on_button_release_event (Gdk.EventButton event) | ||
| { | ||
| /* re-enable selection */ | ||
| Gtk.TreeSelection selection = this.get_selection (); | ||
| selection.set_select_function ((sel, mod, path, cursel) => { return true; }); | ||
|
|
||
| Gtk.TreePath? path; | ||
| Gtk.TreeViewColumn? column; | ||
| bool valid = this.get_path_at_pos ((int)event.x, (int)event.y, out path, out column, null, null); | ||
| if (valid && | ||
| this.blocked_selection_path != null && | ||
| path.compare (this.blocked_selection_path) == 0 && // equal paths | ||
| !(event.x == 0.0 && event.y == 0.0)) // a strange case | ||
| { | ||
| this.set_cursor (path, column, false); | ||
| } | ||
| this.blocked_selection_path = null; | ||
|
|
||
| /* not handled */ | ||
| return false; | ||
| } | ||
| } | ||
| } |
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