mirror of
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535 lines
19 KiB
C#
535 lines
19 KiB
C#
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/* 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.ComponentModel;
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using System.Drawing;
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using System.Windows.Forms;
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using XenAdmin.Actions;
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using XenAPI;
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using XenAdmin.Dialogs;
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namespace XenAdmin.Commands
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{
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/// <summary>
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/// An interface used to hide the SetSelection and SetMainWindow methods on the <see cref="Command"/> class.
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/// These methods are used only by the Command framework and are potentially confusing if seen by Command consumers.
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/// </summary>
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internal interface ICommand
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{
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void SetSelection(IEnumerable<SelectedItem> selection);
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void SetMainWindow(IMainWindow mainWindow);
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}
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/// <summary>
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/// A class which represents a user's task in XenCenter. Classes derived from <see cref="Command"/> can be easily
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/// assigned to menu items and toolbar buttons.
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/// </summary>
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[TypeConverter(typeof(CommandConverter))]
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internal abstract class Command : ICommand
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{
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private SelectedItemCollection _selection = new SelectedItemCollection();
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private IMainWindow _mainWindow;
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private Control _parent;
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/// <summary>
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/// Initializes a new instance of this Command. The parameter-less constructor is required in the derived
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/// class if it is to be attached to a ToolStrip menu item or button. It should not be used in any other scenario.
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/// </summary>
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protected Command()
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="Command"/> class.
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/// </summary>
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/// <param name="mainWindow">The application main window.</param>
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protected Command(IMainWindow mainWindow)
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{
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Util.ThrowIfParameterNull(mainWindow, "mainWindow");
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_mainWindow = mainWindow;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="Command"/> class.
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/// </summary>
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/// <param name="mainWindow">The application main window.</param>
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/// <param name="selection">The selection context for the Command.</param>
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protected Command(IMainWindow mainWindow, IEnumerable<SelectedItem> selection)
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: this(mainWindow)
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{
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Util.ThrowIfParameterNull(selection, "selection");
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_selection = new SelectedItemCollection(selection);
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="Command"/> class.
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/// </summary>
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/// <param name="mainWindow">The application main window.</param>
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/// <param name="selection">The selection context for the Command.</param>
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protected Command(IMainWindow mainWindow, SelectedItem selection)
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: this(mainWindow, new SelectedItem[] { selection })
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="Command"/> class.
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/// </summary>
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/// <param name="mainWindow">The application main window.</param>
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/// <param name="selection">The selection context for the Command.</param>
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protected Command(IMainWindow mainWindow, IXenObject selection)
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: this(mainWindow, new SelectedItem(selection))
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{
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}
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/// <summary>
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/// Gets a list of <see cref="SelectedItem"/>s from the specified <see cref="IXenObject"/>s.
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/// </summary>
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protected static IEnumerable<SelectedItem> ConvertToSelection<T>(IEnumerable<T> xenObjects) where T : IXenObject
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{
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Util.ThrowIfParameterNull(xenObjects, "selection");
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List<SelectedItem> selection = new List<SelectedItem>();
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foreach (T xenObject in xenObjects)
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{
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selection.Add(new SelectedItem(xenObject));
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}
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return selection;
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}
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/// <summary>
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/// Gets the current selection context for the Command.
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/// </summary>
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public SelectedItemCollection GetSelection()
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{
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return GetSelectionCore();
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}
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/// <summary>
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/// Gets the current selection context for the Command.
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/// </summary>
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protected virtual SelectedItemCollection GetSelectionCore()
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{
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return _selection;
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}
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/// <summary>
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/// Determines whether this instance can execute with the current selection context.
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/// </summary>
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/// <returns>
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/// <c>true</c> if this instance can execute; otherwise, <c>false</c>.
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/// </returns>
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public bool CanExecute()
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{
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return MainWindowCommandInterface != null && CanExecuteCore(GetSelection());
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}
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/// <summary>
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/// Determines whether this instance can execute with the current selection context.
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/// </summary>
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/// <param name="selection">The selection context.</param>
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/// <returns>
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/// <c>true</c> if this instance can execute with the specified selection; otherwise, <c>false</c>.
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/// </returns>
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protected virtual bool CanExecuteCore(SelectedItemCollection selection)
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{
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return true;
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}
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/// <summary>
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/// Executes this Command on the current selection.
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/// </summary>
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public void Execute()
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{
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if (Confirm())
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{
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CommandErrorDialog errorDialog = GetErrorDialog();
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ExecuteCore(GetSelection());
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if (errorDialog != null)
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{
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errorDialog.ShowDialog(Parent);
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}
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}
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}
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/// <summary>
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/// Executes this Command.
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/// </summary>
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/// <param name="selection">The selection the Command should operate on.</param>
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protected virtual void ExecuteCore(SelectedItemCollection selection)
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{
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}
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/// <summary>
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/// Gets the text for a menu item which launches this Command.
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/// </summary>
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public virtual string MenuText
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{
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get { return null; }
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set { throw new NotImplementedException(); }
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}
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/// <summary>
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/// Gets the text for a context menu item which launches this Command.
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/// </summary>
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public virtual string ContextMenuText
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the image for a menu item which launches this Command.
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/// </summary>
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public virtual Image MenuImage
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the image for a context menu item which launches this Command.
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/// </summary>
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public virtual Image ContextMenuImage
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the text for the toolbar button which launches this Command.
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/// </summary>
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public virtual string ToolBarText
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the image for a toolbar button which launches this Command.
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/// </summary>
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public virtual Image ToolBarImage
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the text for a button which launches this Command.
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/// </summary>
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public virtual string ButtonText
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the tool tip text. By default this is the can't execute reason if execution is not possible and
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/// blank if it can. Override EnabledToolTipText to provide a descriptive tooltip when the command is enabled.
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/// </summary>
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public virtual string ToolTipText
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{
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get
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{
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if (CanExecute())
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return EnabledToolTipText;
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return DisabledToolTipText;
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}
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}
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/// <summary>
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/// Gets the tool tip text when the command is not able to run. CantExectuteReason for single items,
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/// null for multiple.
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/// </summary>
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protected virtual string DisabledToolTipText
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{
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get
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{
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Dictionary<SelectedItem,string> reasons = GetCantExecuteReasons();
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// It's necessary to double check that we have one reason which matches up with a single selection
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// as CanExecuteCore and GetCantExecuteReasons aren't required to match up.
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if (reasons.Count == 1 && GetSelection().Count == 1)
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{
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foreach (string s in reasons.Values)
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{
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if (s.Equals(Messages.UNKNOWN))
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{
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//This is the default, and not a useful tooltip
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return null;
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}
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return s;
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}
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}
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return null;
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}
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}
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/// <summary>
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/// Gets the tool tip text when the command is able to run. Null by default.
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/// </summary>
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protected virtual string EnabledToolTipText
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the shortcut key display string. This is only used if this Command is used on the main menu.
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/// </summary>
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public virtual string ShortcutKeyDisplayString
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the shortcut keys. This is only used if this Command is used on the main menu.
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/// </summary>
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public virtual Keys ShortcutKeys
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{
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get { return Keys.None; }
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}
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/// <summary>
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/// Gets a value indicating whether a confirmation dialog should be shown.
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/// </summary>
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protected virtual bool ConfirmationRequired
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{
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get { return false; }
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}
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/// <summary>
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/// Gets the confirmation dialog title. The default for this is Messages.MESSAGEBOX_CONFIRM.
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/// </summary>
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protected virtual string ConfirmationDialogTitle
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the confirmation dialog text.
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/// </summary>
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protected virtual string ConfirmationDialogText
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the help id for the confirmatin dialog.
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/// </summary>
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protected virtual string ConfirmationDialogHelpId
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the confirmation dialog's "Yes" button label.
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/// </summary>
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protected virtual string ConfirmationDialogYesButtonLabel
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{
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get { return null; }
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}
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/// <summary>
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/// Gets the confirmation dialog's "No" button label.
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/// </summary>
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protected virtual string ConfirmationDialogNoButtonLabel
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{
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get { return null; }
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}
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/// <summary>
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/// Gets a value indicating whether the "No" button should be selected when a confirmation dialog is displayed.
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/// </summary>
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protected virtual bool ConfirmationDialogNoButtonSelected
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{
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get { return false; }
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}
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/// <summary>
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/// Shows a confirmation dialog.
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/// </summary>
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/// <returns>true if the user clicked Yes.</returns>
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protected bool ShowConfirmationDialog()
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{
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ThreeButtonDialog.TBDButton buttonYes = ThreeButtonDialog.ButtonYes;
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if (!string.IsNullOrEmpty(ConfirmationDialogYesButtonLabel))
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buttonYes.label = ConfirmationDialogYesButtonLabel;
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ThreeButtonDialog.TBDButton buttonNo = ThreeButtonDialog.ButtonNo;
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if (!string.IsNullOrEmpty(ConfirmationDialogNoButtonLabel))
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buttonNo.label = ConfirmationDialogNoButtonLabel;
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if (ConfirmationDialogNoButtonSelected)
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buttonNo.selected = true;
|
|||
|
|
|
|||
|
|
return MainWindow.Confirm(null, Parent, ConfirmationDialogTitle ?? Messages.XENCENTER,
|
|||
|
|
ConfirmationDialogHelpId, buttonYes, buttonNo, ConfirmationDialogText);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Shows a confirmation dialog if required.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <returns>True if the operation should proceed.</returns>
|
|||
|
|
protected virtual bool Confirm()
|
|||
|
|
{
|
|||
|
|
return !ConfirmationRequired || ShowConfirmationDialog();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Gets all of the reasons that items in the selection can't execute.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <returns>A dictionary of reasons keyed by the item name.</returns>
|
|||
|
|
public Dictionary<SelectedItem, string> GetCantExecuteReasons()
|
|||
|
|
{
|
|||
|
|
Dictionary<SelectedItem, string> cantExecuteReasons = new Dictionary<SelectedItem, string>();
|
|||
|
|
|
|||
|
|
foreach (SelectedItem item in GetSelection())
|
|||
|
|
{
|
|||
|
|
string reason = GetCantExecuteReason(item);
|
|||
|
|
|
|||
|
|
if (reason != null)
|
|||
|
|
{
|
|||
|
|
cantExecuteReasons.Add(item, reason);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return cantExecuteReasons;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private string GetCantExecuteReason(SelectedItem item)
|
|||
|
|
{
|
|||
|
|
SelectedItemCollection selection = GetSelection();
|
|||
|
|
((ICommand)this).SetSelection(new[] { item });
|
|||
|
|
|
|||
|
|
try
|
|||
|
|
{
|
|||
|
|
if (!CanExecute() && item.XenObject != null)
|
|||
|
|
{
|
|||
|
|
return GetCantExecuteReasonCore(item);
|
|||
|
|
}
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
finally
|
|||
|
|
{
|
|||
|
|
((ICommand)this).SetSelection(selection);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Gets the reason that the specified item from the selection cant execute. This is displayed in the error dialog.
|
|||
|
|
/// The default is "Unknown".
|
|||
|
|
/// </summary>
|
|||
|
|
protected virtual string GetCantExecuteReasonCore(SelectedItem item)
|
|||
|
|
{
|
|||
|
|
return Messages.UNKNOWN;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private CommandErrorDialog GetErrorDialog()
|
|||
|
|
{
|
|||
|
|
Dictionary<SelectedItem, string> cantExecuteReasons = GetCantExecuteReasons();
|
|||
|
|
|
|||
|
|
if (cantExecuteReasons.Count > 0)
|
|||
|
|
{
|
|||
|
|
return GetErrorDialogCore(cantExecuteReasons);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Gets the error dialog to be displayed if one or more items in the selection couldn't be executed. Returns null by
|
|||
|
|
/// default i.e. An error dialog isn't displayed by default.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="cantExecuteReasons">The reasons for why the items couldn't execute.</param>
|
|||
|
|
protected virtual CommandErrorDialog GetErrorDialogCore(IDictionary<SelectedItem, string> cantExecuteReasons)
|
|||
|
|
{
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Gets the main window to be used by the Command.
|
|||
|
|
/// </summary>
|
|||
|
|
public IMainWindow MainWindowCommandInterface
|
|||
|
|
{
|
|||
|
|
get { return _mainWindow; }
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Sets the parent for any dialogs. If not called, then the main window is used.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="parent">The parent.</param>
|
|||
|
|
public void SetParent(Control parent)
|
|||
|
|
{
|
|||
|
|
_parent = parent;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Gets the parent for any dialogs. If SetParent() hasn't been called then the MainWindow is returned.
|
|||
|
|
/// </summary>
|
|||
|
|
public Control Parent
|
|||
|
|
{
|
|||
|
|
get
|
|||
|
|
{
|
|||
|
|
return _parent ?? _mainWindow.Form;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Runs the specified <see cref="AsyncAction"/>s such that they are synchronous per connection but asynchronous across connections.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="runActionsInParallel">Whether or not the actions should be executed symultaneously</param>
|
|||
|
|
public void RunMultipleActions(IEnumerable<AsyncAction> actions, string title, string startDescription, string endDescription, bool runActionsInParallel)
|
|||
|
|
{
|
|||
|
|
MultipleActionLauncher launcher = new MultipleActionLauncher(actions, title, startDescription, endDescription, runActionsInParallel);
|
|||
|
|
launcher.Run();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#region ICommand Members
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Sets the selection context for the Command. This is hidden as it is only for use by the Command framework.
|
|||
|
|
/// </summary>
|
|||
|
|
void ICommand.SetSelection(IEnumerable<SelectedItem> selection)
|
|||
|
|
{
|
|||
|
|
Util.ThrowIfParameterNull(selection, "selection");
|
|||
|
|
_selection = new SelectedItemCollection(selection);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Sets the main window for the Command. This is hidden as it is only for use by the Command framework.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="mainWindow">The main window.</param>
|
|||
|
|
void ICommand.SetMainWindow(IMainWindow mainWindow)
|
|||
|
|
{
|
|||
|
|
Util.ThrowIfParameterNull(mainWindow, "mainWindow");
|
|||
|
|
_mainWindow = mainWindow;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#endregion
|
|||
|
|
}
|
|||
|
|
}
|