-
Notifications
You must be signed in to change notification settings - Fork 976
Expand file tree
/
Copy pathPlotViewBase.cs
More file actions
489 lines (424 loc) · 15.7 KB
/
Copy pathPlotViewBase.cs
File metadata and controls
489 lines (424 loc) · 15.7 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
// --------------------------------------------------------------------------------------------------------------------
// <copyright file="PlotViewBase.cs" company="OxyPlot">
// Copyright (c) 2020 OxyPlot contributors
// </copyright>
// --------------------------------------------------------------------------------------------------------------------
namespace OxyPlot.Wpf
{
using OxyPlot;
using System;
using System.Collections.ObjectModel;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Threading;
using System.Windows.Documents;
using CursorType = OxyPlot.CursorType;
/// <summary>
/// Base class for WPF PlotView implementations.
/// </summary>
[TemplatePart(Name = PartGrid, Type = typeof(Grid))]
public abstract partial class PlotViewBase : Control, IPlotView
{
/// <summary>
/// The Grid PART constant.
/// </summary>
protected const string PartGrid = "PART_Grid";
/// <summary>
/// The grid.
/// </summary>
protected Grid grid;
/// <summary>
/// The plot presenter.
/// </summary>
protected FrameworkElement plotPresenter;
/// <summary>
/// The render context
/// </summary>
protected IRenderContext renderContext;
/// <summary>
/// The model lock.
/// </summary>
private readonly object modelLock = new object();
/// <summary>
/// The current tracker.
/// </summary>
private FrameworkElement currentTracker;
/// <summary>
/// The current tracker template.
/// </summary>
private ControlTemplate currentTrackerTemplate;
/// <summary>
/// The default plot controller.
/// </summary>
private IPlotController defaultController;
/// <summary>
/// Indicates whether the <see cref="PlotViewBase"/> was in the visual tree the last time <see cref="Render"/> was called.
/// </summary>
private bool isInVisualTree;
/// <summary>
/// The mouse down point.
/// </summary>
private ScreenPoint mouseDownPoint;
/// <summary>
/// The overlays.
/// </summary>
private Canvas overlays;
/// <summary>
/// The zoom control.
/// </summary>
private ContentControl zoomControl;
/// <summary>
/// Initializes static members of the <see cref="PlotViewBase" /> class.
/// </summary>
static PlotViewBase()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(PlotViewBase), new FrameworkPropertyMetadata(typeof(PlotViewBase)));
PaddingProperty.OverrideMetadata(typeof(PlotViewBase), new FrameworkPropertyMetadata(new Thickness(8)));
}
/// <summary>
/// Initializes a new instance of the <see cref="PlotViewBase" /> class.
/// </summary>
protected PlotViewBase()
{
this.TrackerDefinitions = new ObservableCollection<TrackerDefinition>();
this.CommandBindings.Add(new CommandBinding(PlotCommands.ResetAxes, (s, e) => this.ResetAllAxes()));
this.IsManipulationEnabled = true;
this.LayoutUpdated += this.OnLayoutUpdated;
}
/// <summary>
/// Gets the actual PlotView controller.
/// </summary>
/// <value>The actual PlotView controller.</value>
public IPlotController ActualController => this.Controller ?? (this.defaultController ??= new PlotController());
/// <inheritdoc/>
IController IView.ActualController => this.ActualController;
/// <summary>
/// Gets the actual model.
/// </summary>
/// <value>The actual model.</value>
public PlotModel ActualModel { get; private set; }
/// <inheritdoc/>
Model IView.ActualModel => this.ActualModel;
/// <summary>
/// Gets the coordinates of the client area of the view.
/// </summary>
public OxyRect ClientArea => new OxyRect(0, 0, this.ActualWidth, this.ActualHeight);
/// <summary>
/// Gets the tracker definitions.
/// </summary>
/// <value>The tracker definitions.</value>
public ObservableCollection<TrackerDefinition> TrackerDefinitions { get; }
/// <summary>
/// Hides the tracker.
/// </summary>
public void HideTracker()
{
if (this.currentTracker != null)
{
this.overlays.Children.Remove(this.currentTracker);
this.currentTracker = null;
this.currentTrackerTemplate = null;
}
}
/// <summary>
/// Hides the zoom rectangle.
/// </summary>
public void HideZoomRectangle()
{
this.zoomControl.Visibility = Visibility.Collapsed;
}
/// <summary>
/// Invalidate the PlotView (not blocking the UI thread)
/// </summary>
/// <param name="updateData">The update Data.</param>
public void InvalidatePlot(bool updateData = true)
{
if (this.ActualModel == null)
{
return;
}
lock (this.ActualModel.SyncRoot)
{
((IPlotModel)this.ActualModel).Update(updateData);
}
this.BeginInvoke(this.Render);
}
/// <inheritdoc/>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
this.grid = this.GetTemplateChild(PartGrid) as Grid;
if (this.grid == null)
{
return;
}
this.plotPresenter = this.CreatePlotPresenter();
this.grid.Children.Add(this.plotPresenter);
this.plotPresenter.UpdateLayout();
this.renderContext = this.CreateRenderContext();
this.overlays = new Canvas();
this.grid.Children.Add(this.overlays);
this.zoomControl = new ContentControl();
this.zoomControl.Focusable = false;
this.overlays.Children.Add(this.zoomControl);
// add additional grid on top of everthing else to fix issue of mouse events getting lost
// it must be added last so it covers all other controls
var mouseGrid = new Grid
{
Background = Brushes.Transparent // background must be set for hit test to work
};
this.grid.Children.Add(mouseGrid);
}
/// <summary>
/// Pans all axes.
/// </summary>
/// <param name="delta">The delta.</param>
public void PanAllAxes(Vector delta)
{
if (this.ActualModel != null)
{
this.ActualModel.PanAllAxes(delta.X, delta.Y);
}
this.InvalidatePlot(false);
}
/// <summary>
/// Resets all axes.
/// </summary>
public void ResetAllAxes()
{
if (this.ActualModel != null)
{
this.ActualModel.ResetAllAxes();
}
this.InvalidatePlot(false);
}
/// <summary>
/// Stores text on the clipboard.
/// </summary>
/// <param name="text">The text.</param>
public void SetClipboardText(string text)
{
Clipboard.SetText(text);
}
/// <summary>
/// Sets the cursor type.
/// </summary>
/// <param name="cursorType">The cursor type.</param>
public void SetCursorType(CursorType cursorType)
{
this.Cursor = cursorType switch
{
CursorType.Pan => this.PanCursor,
CursorType.ZoomRectangle => this.ZoomRectangleCursor,
CursorType.ZoomHorizontal => this.ZoomHorizontalCursor,
CursorType.ZoomVertical => this.ZoomVerticalCursor,
_ => Cursors.Arrow,
};
}
/// <summary>
/// Shows the tracker.
/// </summary>
/// <param name="trackerHitResult">The tracker data.</param>
public void ShowTracker(TrackerHitResult trackerHitResult)
{
if (trackerHitResult == null)
{
this.HideTracker();
return;
}
var trackerTemplate = this.DefaultTrackerTemplate;
if (trackerHitResult.Series != null && !string.IsNullOrEmpty(trackerHitResult.Series.TrackerKey))
{
var match = this.TrackerDefinitions.FirstOrDefault(t => t.TrackerKey == trackerHitResult.Series.TrackerKey);
if (match != null)
{
trackerTemplate = match.TrackerTemplate;
}
}
if (trackerTemplate == null)
{
this.HideTracker();
return;
}
if (!ReferenceEquals(trackerTemplate, this.currentTrackerTemplate))
{
this.HideTracker();
var tracker = new ContentControl { Template = trackerTemplate };
this.overlays.Children.Add(tracker);
this.currentTracker = tracker;
this.currentTrackerTemplate = trackerTemplate;
}
if (this.currentTracker != null)
{
this.currentTracker.DataContext = trackerHitResult;
}
}
/// <summary>
/// Shows the zoom rectangle.
/// </summary>
/// <param name="r">The rectangle.</param>
public void ShowZoomRectangle(OxyRect r)
{
this.zoomControl.Width = r.Width;
this.zoomControl.Height = r.Height;
Canvas.SetLeft(this.zoomControl, r.Left);
Canvas.SetTop(this.zoomControl, r.Top);
this.zoomControl.Template = this.ZoomRectangleTemplate;
this.zoomControl.Visibility = Visibility.Visible;
}
/// <summary>
/// Zooms all axes.
/// </summary>
/// <param name="factor">The zoom factor.</param>
public void ZoomAllAxes(double factor)
{
if (this.ActualModel != null)
{
this.ActualModel.ZoomAllAxes(factor);
}
this.InvalidatePlot(false);
}
/// <summary>
/// Clears the background of the plot presenter.
/// </summary>
protected abstract void ClearBackground();
/// <summary>
/// Creates the plot presenter.
/// </summary>
/// <returns>The plot presenter.</returns>
protected abstract FrameworkElement CreatePlotPresenter();
/// <summary>
/// Creates the render context.
/// </summary>
/// <returns>The render context.</returns>
protected abstract IRenderContext CreateRenderContext();
/// <summary>
/// Called when the model is changed.
/// </summary>
protected void OnModelChanged()
{
lock (this.modelLock)
{
if (this.ActualModel != null)
{
((IPlotModel)this.ActualModel).AttachPlotView(null);
this.ActualModel = null;
}
if (this.Model != null)
{
((IPlotModel)this.Model).AttachPlotView(this);
this.ActualModel = this.Model;
}
}
this.InvalidatePlot();
}
/// <summary>
/// Renders the plot model to the plot presenter.
/// </summary>
protected void Render()
{
if (this.plotPresenter == null || this.renderContext == null)
{
return;
}
this.isInVisualTree = this.IsInVisualTree();
this.RenderOverride();
}
/// <summary>
/// Renders the plot model to the plot presenter.
/// </summary>
protected virtual void RenderOverride()
{
var dpiScale = this.UpdateDpi();
this.ClearBackground();
if (this.ActualModel != null)
{
// round width and height to full device pixels
var width = ((int)(this.plotPresenter.ActualWidth * dpiScale)) / dpiScale;
var height = ((int)(this.plotPresenter.ActualHeight * dpiScale)) / dpiScale;
lock (this.ActualModel.SyncRoot)
{
((IPlotModel)this.ActualModel).Render(this.renderContext, new OxyRect(0, 0, width, height));
}
}
}
/// <summary>
/// Updates the DPI scale of the render context.
/// </summary>
/// <returns>The DPI scale.</returns>
protected virtual double UpdateDpi()
{
var transformMatrix = PresentationSource.FromVisual(this)?.CompositionTarget?.TransformToDevice;
var scale = transformMatrix == null ? 1 : (transformMatrix.Value.M11 + transformMatrix.Value.M22) / 2;
return scale;
}
/// <summary>
/// Called when the model is changed.
/// </summary>
/// <param name="d">The sender.</param>
/// <param name="e">The <see cref="System.Windows.DependencyPropertyChangedEventArgs" /> instance containing the event data.</param>
private static void ModelChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
((PlotViewBase)d).OnModelChanged();
}
/// <summary>
/// Invokes the specified action on the dispatcher, if necessary.
/// </summary>
/// <param name="action">The action.</param>
private void BeginInvoke(Action action)
{
if (!this.Dispatcher.CheckAccess())
{
this.Dispatcher.BeginInvoke(DispatcherPriority.Loaded, action);
}
else
{
action();
}
}
/// <summary>
/// Gets a value indicating whether the <see cref="PlotViewBase"/> is connected to the visual tree.
/// </summary>
/// <returns><c>true</c> if the PlotViewBase is connected to the visual tree; <c>false</c> otherwise.</returns>
private bool IsInVisualTree()
{
DependencyObject dpObject = this;
while ((dpObject = VisualTreeHelper.GetParent(dpObject)) != null)
{
if (dpObject is Window)
{
return true;
}
//Check if the parent is an AdornerDecorator like in an ElementHost
if (dpObject is AdornerDecorator)
{
return true;
}
//Check if the logical parent is a popup. If so, we found the popuproot
var logicalRoot = LogicalTreeHelper.GetParent(dpObject);
if (logicalRoot is Popup)
{
return true;
}
}
return false;
}
/// <summary>
/// This event fires every time Layout updates the layout of the trees associated with current Dispatcher.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The event args.</param>
private void OnLayoutUpdated(object sender, EventArgs e)
{
// if we were not in the visual tree the last time we tried to render but are now, we have to render
if (!this.isInVisualTree && this.IsInVisualTree())
{
this.Render();
}
}
}
}