Free cookie consent management tool by TermsFeed Policy Generator

source: stable/HeuristicLab.MainForm.WindowsForms/3.3/Controls/ViewHost.cs @ 9977

Last change on this file since 9977 was 9977, checked in by ascheibe, 9 years ago

#2100 merged r9915-r9916, r9920-r9921, r9935 into stable branch

File size: 12.7 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2013 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24using System.Drawing;
25using System.Linq;
26using System.Windows.Forms;
27using HeuristicLab.Common;
28
29namespace HeuristicLab.MainForm.WindowsForms {
30  [Content(typeof(IContent))]
31  public sealed partial class ViewHost : AsynchronousContentView {
32    public ViewHost() {
33      InitializeComponent();
34      startDragAndDrop = false;
35      viewContextMenuStrip.IgnoredViewTypes = new List<Type>() { typeof(ViewHost) };
36
37      viewType = null;
38      activeView = null;
39      Content = null;
40      messageLabel.Visible = false;
41      viewsLabel.Visible = false;
42      viewsLabelVisible = true;
43    }
44
45    private bool viewsLabelVisible;
46    public bool ViewsLabelVisible {
47      get { return viewsLabelVisible; }
48      set {
49        if (viewsLabelVisible != value) {
50          viewsLabelVisible = value;
51          viewsLabel.Visible = value;
52          View view = activeView as View;
53          if (view != null) view.Dock = viewsLabelVisible ? DockStyle.None : DockStyle.Fill;
54        }
55      }
56    }
57
58    private IContentView cachedView;
59    private IContentView activeView;
60    public IContentView ActiveView {
61      get { return activeView; }
62      private set {
63        if (activeView != value) {
64          if (activeView != null) {
65            cachedView = activeView;
66            DeregisterActiveViewEvents();
67            View cached = cachedView as View;
68            if (cached != null) {
69              cached.OnHidden(EventArgs.Empty);
70              cached.Visible = false;
71            }
72          }
73
74          activeView = value;
75
76          if (activeView != null) {
77            #region dispose cachedView
78            if (activeView != cachedView) {
79              if (cachedView != null) cachedView.Content = null;  //needed to deregister events
80              View cached = cachedView as View;
81              if (cached != null) {
82                Controls.Remove(cached);
83                cached.Dispose();
84              }
85              cachedView = null;
86            }
87            #endregion
88
89            this.Caption = activeView.Caption;
90            viewType = activeView.GetType();
91            RegisterActiveViewEvents();
92            View view = activeView as View;
93            if (view != null) {
94              view.Visible = true;
95              if (ViewsLabelVisible) {
96                view.Anchor = AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Top | AnchorStyles.Right;
97                view.Size = new Size(Width - this.viewsLabel.Width - this.viewsLabel.Margin.Left - this.viewsLabel.Margin.Right, this.Height);
98              } else view.Dock = DockStyle.Fill;
99              if (!Controls.Contains((view))) Controls.Add(view);
100              view.OnShown(new ViewShownEventArgs(view, false));
101            }
102          } else viewType = null;
103          configurationLabel.Visible = activeView is IConfigureableView;
104          configurationLabel.Enabled = activeView != null && !activeView.Locked;
105
106          helpLabel.Visible = activeView != null && ViewAttribute.HasHelpResourcePath(activeView.GetType());
107          helpLabel.Top = CalculateHelpLabelPosY();
108        }
109      }
110    }
111
112    private Type viewType;
113    public Type ViewType {
114      get { return viewType; }
115      set {
116        if (viewType != value) {
117          if (value == typeof(ViewHost))
118            throw new ArgumentException("Directly nested ViewHosts are not allowed.");
119          if (value != null && Content != null && !ViewCanShowContent(value, Content))
120            throw new ArgumentException(string.Format("View \"{0}\" cannot display content \"{1}\".", value, Content.GetType()));
121
122          viewType = value;
123          OnViewTypeChanged();
124        }
125      }
126    }
127
128    protected override void SetEnabledStateOfControls() {
129      Enabled = Content != null;
130    }
131
132    protected override void OnContentChanged() {
133      viewContextMenuStrip.Item = Content;
134      //change ViewType if view of ViewType can not show content or is null
135      if (Content != null) {
136        if (!ViewCanShowContent(viewType, Content)) {
137          Type defaultViewType = MainFormManager.GetDefaultViewType(Content.GetType());
138          if (cachedView != null && cachedView.GetType() == defaultViewType)
139            ActiveView = cachedView;
140          else if (defaultViewType != null)
141            ViewType = defaultViewType;
142          else if (viewContextMenuStrip.Items.Count > 0)  // create first available view if no default view is available
143            ViewType = (Type)viewContextMenuStrip.Items[0].Tag;
144          else {
145            ViewType = null;
146            ActiveView = null;
147          }
148        }
149        if (ActiveView != null) ActiveView.Content = Content;
150      } else ActiveView = null;
151      UpdateLabels();
152      UpdateActiveMenuItem();
153    }
154
155    private void UpdateLabels() {
156      if (Content != null && viewContextMenuStrip.Items.Count > 0) {
157        messageLabel.Visible = false;
158        viewsLabel.Visible = viewsLabelVisible;
159      } else if (Content != null) {
160        messageLabel.Visible = true;
161        viewsLabel.Visible = false;
162      } else {
163        messageLabel.Visible = false;
164        viewsLabel.Visible = false;
165      }
166    }
167
168    private void OnViewTypeChanged() {
169      if (viewType != null) {
170        if (!ViewCanShowContent(viewType, Content))
171          throw new InvalidOperationException(string.Format("View \"{0}\" cannot display content \"{1}\".",
172                                                            viewType, Content.GetType()));
173        IContentView view = MainFormManager.CreateView(viewType);
174        view.Locked = Locked;
175        view.ReadOnly = ReadOnly;
176        ActiveView = view; //necessary to allow the views to change the status of the viewhost
177        view.Content = Content;
178
179        UpdateActiveMenuItem();
180      }
181    }
182
183    private void RegisterActiveViewEvents() {
184      activeView.CaptionChanged += new EventHandler(activeView_CaptionChanged);
185      activeView.LockedChanged += new EventHandler(activeView_LockedChanged);
186      activeView.Changed += new EventHandler(activeView_Changed);
187    }
188    private void DeregisterActiveViewEvents() {
189      activeView.CaptionChanged -= new EventHandler(activeView_CaptionChanged);
190      activeView.LockedChanged -= new EventHandler(activeView_LockedChanged);
191      activeView.Changed -= new EventHandler(activeView_Changed);
192    }
193    private void activeView_CaptionChanged(object sender, EventArgs e) {
194      Caption = activeView.Caption;
195    }
196    private void activeView_LockedChanged(object sender, EventArgs e) {
197      Locked = activeView.Locked;
198      configurationLabel.Enabled = !activeView.Locked;
199    }
200    private void activeView_Changed(object sender, EventArgs e) {
201      OnChanged();
202    }
203
204    protected override void OnSizeChanged(EventArgs e) {
205      //mkommend: solution to resizing issues. taken from http://support.microsoft.com/kb/953934
206      //not implemented with a panel to reduce the number of nested controls
207      //also cf. http://connect.microsoft.com/VisualStudio/feedback/details/98368/csc-incorrectly-allows-comparison-between-intptr-and-null
208      if (Handle != IntPtr.Zero)
209        this.BeginInvoke((Action<EventArgs>)OnSizeChangedHelper, e);
210    }
211    private void OnSizeChangedHelper(EventArgs e) {
212      base.OnSizeChanged(e);
213      viewsLabel.Location = new Point(Width - viewsLabel.Margin.Right - viewsLabel.Width, viewsLabel.Margin.Top);
214      configurationLabel.Location = new Point(Width - configurationLabel.Margin.Right - configurationLabel.Width, viewsLabel.Bottom + viewsLabel.Margin.Bottom + configurationLabel.Margin.Top);
215      helpLabel.Location = new Point(Width - helpLabel.Margin.Right - helpLabel.Width, CalculateHelpLabelPosY());
216    }
217
218    private int CalculateHelpLabelPosY() {
219      if (activeView != null && ViewAttribute.HasHelpResourcePath(activeView.GetType()) && !configurationLabel.Visible) {
220        return configurationLabel.Top;
221      }
222      return configurationLabel.Bottom + configurationLabel.Margin.Bottom + helpLabel.Margin.Top;
223    }
224
225    #region forwarding of view events
226    internal protected override void OnShown(ViewShownEventArgs e) {
227      base.OnShown(e);
228      View view = ActiveView as View;
229      if (view != null)
230        view.OnShown(e);
231    }
232    internal protected override void OnHidden(EventArgs e) {
233      base.OnHidden(e);
234      View view = ActiveView as View;
235      if (view != null)
236        view.OnHidden(e);
237    }
238    internal protected override void OnClosing(FormClosingEventArgs e) {
239      base.OnClosing(e);
240      View view = ActiveView as View;
241      if (view != null)
242        view.OnClosing(e);
243    }
244    internal protected override void OnClosed(FormClosedEventArgs e) {
245      base.OnClosed(e);
246      View view = ActiveView as View;
247      if (view != null)
248        view.OnClosed(e);
249    }
250    #endregion
251
252    #region GUI actions
253    private void UpdateActiveMenuItem() {
254      foreach (KeyValuePair<Type, ToolStripMenuItem> item in viewContextMenuStrip.MenuItems) {
255        if (item.Key == viewType) {
256          item.Value.Checked = true;
257          item.Value.Enabled = false;
258        } else {
259          item.Value.Checked = false;
260          item.Value.Enabled = true;
261        }
262      }
263    }
264
265    private bool ViewCanShowContent(Type viewType, object content) {
266      if (content == null) // every view can display null
267        return true;
268      if (viewType == null)
269        return false;
270      return ContentAttribute.CanViewType(viewType, Content.GetType()) && viewContextMenuStrip.MenuItems.Any(item => item.Key == viewType);
271    }
272
273    private void viewsLabel_DoubleClick(object sender, EventArgs e) {
274      IContentView view = MainFormManager.MainForm.ShowContent(this.Content, this.ViewType);
275      if (view != null) {
276        view.ReadOnly = this.ReadOnly;
277        view.Locked = this.Locked;
278      }
279    }
280    private void viewContextMenuStrip_ItemClicked(object sender, ToolStripItemClickedEventArgs e) {
281      Type viewType = (Type)e.ClickedItem.Tag;
282      ViewType = viewType;
283    }
284
285    private bool startDragAndDrop;
286    private void viewsLabel_MouseDown(object sender, MouseEventArgs e) {
287      if (e.Button == System.Windows.Forms.MouseButtons.Right) {
288        Screen screen = Screen.FromControl(viewsLabel);
289        int rightBorder = viewsLabel.PointToScreen(viewsLabel.Location).X + viewContextMenuStrip.Width; //
290        rightBorder = rightBorder - screen.Bounds.X; //pixel position on active screen
291
292        if (rightBorder < screen.Bounds.Width)
293          viewContextMenuStrip.Show(viewsLabel, viewsLabel.Margin.Left, viewsLabel.Margin.Top);
294        else
295          viewContextMenuStrip.Show(screen.Bounds.X + screen.Bounds.Width - viewContextMenuStrip.Width, viewsLabel.PointToScreen(viewsLabel.Location).Y - viewsLabel.Margin.Top);
296      } else if (!Locked) {
297        startDragAndDrop = true;
298        viewsLabel.Capture = false;
299        viewsLabel.Focus();
300      }
301    }
302    private void viewsLabel_MouseLeave(object sender, EventArgs e) {
303      if ((Control.MouseButtons & MouseButtons.Left) == MouseButtons.Left && startDragAndDrop) {
304        DataObject data = new DataObject();
305        data.SetData(HeuristicLab.Common.Constants.DragDropDataFormat, Content);
306        DoDragDrop(data, DragDropEffects.Copy | DragDropEffects.Link);
307      } else
308        startDragAndDrop = false;
309    }
310
311    private void configurationLabel_DoubleClick(object sender, MouseEventArgs e) {
312      ((IConfigureableView)ActiveView).ShowConfiguration();
313    }
314
315    private void helpLabel_DoubleClick(object sender, EventArgs e) {
316      using (InfoBox dialog = new InfoBox("Help for " + ViewAttribute.GetViewName(ActiveView.GetType()), ViewAttribute.GetHelpResourcePath(ActiveView.GetType()), ActiveView)) {
317        dialog.ShowDialog(this);
318      }
319    }
320    #endregion
321  }
322}
Note: See TracBrowser for help on using the repository browser.