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//
// WizardDialogController.cs
//
// Author:
// Vsevolod Kukol <sevoku@microsoft.com>
//
// Copyright (c) 2016 Microsoft Corporation
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MonoDevelop.Components;
using MonoDevelop.Core;
using Xwt.Drawing;
namespace MonoDevelop.Ide.Gui.Wizard
{
public abstract class WizardDialogControllerBase : IWizardDialogController
{
string title;
Image image;
Control rightSideWidget;
Xwt.Size defaultPageSize;
IWizardDialogPage currentPage;
public string Title {
get { return title; }
set {
title = value;
OnPropertyChanged (nameof (Title));
}
}
public Image Icon {
get { return image; }
set {
image = value;
OnPropertyChanged (nameof (Icon));
}
}
public Control RightSideWidget {
get { return rightSideWidget; }
set {
rightSideWidget = value;
OnPropertyChanged (nameof (RightSideWidget));
}
}
public Xwt.Size DefaultPageSize {
get { return defaultPageSize; }
set {
defaultPageSize = value;
OnPropertyChanged (nameof (DefaultPageSize));
}
}
public IWizardDialogPage CurrentPage {
get {
return currentPage;
}
private set {
currentPage = value;
OnPropertyChanged (nameof (CurrentPage));
}
}
public abstract bool CurrentPageIsLast { get; }
public abstract bool CanGoBack { get; }
public WizardDialogControllerBase (string title, Image icon, Control rightSideWidget, IWizardDialogPage firstPage)
{
Title = title;
Icon = icon;
CurrentPage = firstPage;
RightSideWidget = rightSideWidget;
}
public async Task GoNext (CancellationToken token)
{
if (currentPage.CanGoNext) {
if (CurrentPageIsLast) {
await OnCompleted (token).ConfigureAwait (false);
if (!token.IsCancellationRequested)
Completed?.Invoke (this, EventArgs.Empty);
} else {
var page = await OnGoNext (token).ConfigureAwait (false);
if (!token.IsCancellationRequested)
CurrentPage = page;
}
}
}
protected abstract Task<IWizardDialogPage> OnGoNext (CancellationToken token);
public async Task GoBack (CancellationToken token)
{
if (CanGoBack && currentPage.CanGoBack) {
CurrentPage = await OnGoBack (token).ConfigureAwait (true);
}
}
protected abstract Task<IWizardDialogPage> OnGoBack (CancellationToken token);
public bool RunWizard ()
{
using (var dialog = new WizardDialog (this)) {
return dialog.Run (Xwt.MessageDialog.RootWindow);
}
}
public bool RunWizard (Xwt.WindowFrame parentWindow)
{
using (var dialog = new WizardDialog (this)) {
return dialog.Run (parentWindow);
}
}
public event EventHandler Completed;
public event PropertyChangedEventHandler PropertyChanged;
protected virtual Task OnCompleted (CancellationToken token)
{
return Task.FromResult (true);
}
protected virtual void OnPropertyChanged (string propertyName)
{
Runtime.RunInMainThread (() => {
PropertyChanged?.Invoke (this, new System.ComponentModel.PropertyChangedEventArgs (propertyName));
});
}
public void Dispose ()
{
}
}
public class WizardDialogController : WizardDialogControllerBase
{
ReadOnlyCollection<IWizardDialogPage> pages;
public IReadOnlyCollection<IWizardDialogPage> Pages { get { return pages; } }
public override bool CanGoBack {
get {
return pages.Count > 1 && pages.IndexOf (CurrentPage) > 0;
}
}
public override bool CurrentPageIsLast {
get { return pages.IndexOf (CurrentPage) == Pages.Count - 1; }
}
public WizardDialogController (string title, Image icon, Control rightSideWidget, IWizardDialogPage page)
: this (title, icon, rightSideWidget, new IWizardDialogPage [] { page })
{
}
public WizardDialogController (string title, Image icon, Control rightSideWidget, IEnumerable<IWizardDialogPage> pages)
: base (title, icon, rightSideWidget, pages.FirstOrDefault ())
{
this.pages = new ReadOnlyCollection<IWizardDialogPage> (pages.ToList ());
if (this.pages.Count == 0)
throw new ArgumentException ("pages must contain at least one page.", nameof (pages));
}
protected override Task<IWizardDialogPage> OnGoNext (CancellationToken token)
{
var currentIndex = pages.IndexOf (CurrentPage);
if (currentIndex == pages.Count - 1)
return Task.FromException<IWizardDialogPage>(new InvalidOperationException ());
else
return Task.FromResult (pages [currentIndex + 1]);
}
protected override Task<IWizardDialogPage> OnGoBack (CancellationToken token)
{
var currentIndex = pages.IndexOf (CurrentPage);
return Task.FromResult (pages [currentIndex - 1]);
}
}
}
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