mirror of
https://github.com/xcp-ng/xenadmin.git
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118 lines
4.2 KiB
C#
118 lines
4.2 KiB
C#
/* Copyright (c) Citrix Systems Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Text;
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using XenAPI;
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using System.Collections.ObjectModel;
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using System.ComponentModel;
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using System.Windows.Forms;
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namespace XenAdmin.Commands
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{
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internal class SelectionManager : SelectionBroadcaster
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{
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private SelectedItemCollection _selection = new SelectedItemCollection();
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private SelectedItemCollection savedSelection = null;
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private bool saved = false;
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/// <summary>
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/// Sets the main selection for XenCenter.
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/// </summary>
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/// <param name="selection">The selection.</param>
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public void SetSelection(IEnumerable<SelectedItem> selection)
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{
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Program.AssertOnEventThread();
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Util.ThrowIfParameterNull(selection, "selection");
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int count = 0;
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foreach (SelectedItem item in selection)
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{
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if (item == null)
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throw new ArgumentException("Null SelectedItem found.", "selection");
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count++;
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}
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if (saved && // We have a saved selection: update it instead (CA-147401)
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count != 0) // although if the new selection is empty, we're just refreshing the view: don't save that
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savedSelection = new SelectedItemCollection(selection);
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else
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{
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_selection = new SelectedItemCollection(selection);
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OnSelectionChanged(EventArgs.Empty);
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}
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}
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/// <summary>
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/// Sets the main selection for XenCenter.
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/// </summary>
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/// <param name="item">The selection.</param>
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public void SetSelection(SelectedItem item)
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{
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SetSelection(new SelectedItem[] { item });
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}
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/// <summary>
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/// Gets the current selection which will be used by listening <see cref="CommandToolStripMenuItem"/>s and
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/// <see cref="CommandToolStripButton"/>s.
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/// </summary>
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public override SelectedItemCollection Selection
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{
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get { return _selection; }
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}
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public override void RefreshSelection()
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{
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SetSelection(Selection);
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}
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public override void SaveAndClearSelection()
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{
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Program.AssertOnEventThread();
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savedSelection = _selection;
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SetSelection(new SelectedItemCollection());
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saved = true;
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}
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public override void RestoreSavedSelection()
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{
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Program.AssertOnEventThread();
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if (saved)
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{
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saved = false;
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SetSelection(savedSelection);
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savedSelection = null;
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}
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}
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}
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}
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