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Account for diagram zoom when dragging resizers (#16)
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* add test

* add fix

* enable zoom for testing

* finish writing tests

* add fix for remaining resizers

* Revert "enable zoom for testing"

This reverts commit 69fa0aa.

* fix formatting

* make fields nullable

* fix nullables

* use file scoped namespaces
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@Heathermcx
Heathermcx committed Mar 5, 2024
1 parent a4d0828 commit 920dc36
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Showing 10 changed files with 642 additions and 378 deletions.
32 changes: 18 additions & 14 deletions src/Blazor.Diagrams.Core/Positions/Resizing/BottomLeftResizerProvider.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,12 +7,14 @@ namespace Blazor.Diagrams.Core.Positions.Resizing
{
public class BottomLeftResizerProvider : IResizerProvider
{
public string? Class => "bottomleft";
public string? Class => "bottomleft";

private Size? _originalSize;
private Point? _originalPosition;
private Point? _originalMousePosition;
private NodeModel? _nodeModel;
private Diagram? _diagram;

private Size _originalSize = null!;
private Point _originalPosition = null!;
private Point _originalMousePosition = null!;
private NodeModel _nodeModel = null!;

public Point? GetPosition(Model model)
{
Expand All @@ -29,22 +31,23 @@ public void OnResizeStart(Diagram diagram, Model model, PointerEventArgs eventAr
{
_originalPosition = new Point(nodeModel.Position.X, nodeModel.Position.Y);
_originalMousePosition = new Point(eventArgs.ClientX, eventArgs.ClientY);
_originalSize = nodeModel.Size!;
_originalSize = nodeModel.Size;
_nodeModel = nodeModel;
_diagram = diagram;
}
}

public void OnPointerMove(Model? model, PointerEventArgs args)
{
if (_nodeModel is null)
if (_originalSize is null || _originalPosition is null || _originalMousePosition is null || _nodeModel is null || _diagram is null)
{
return;
}

var height = _originalSize.Height + (args.ClientY - _originalMousePosition.Y);
var width = _originalSize.Width - (args.ClientX - _originalMousePosition.X);
var height = _originalSize.Height + (args.ClientY - _originalMousePosition.Y) / _diagram.Zoom;
var width = _originalSize.Width - (args.ClientX - _originalMousePosition.X) / _diagram.Zoom;

var positionX = _originalPosition.X + (args.ClientX - _originalMousePosition.X);
var positionX = _originalPosition.X + (args.ClientX - _originalMousePosition.X) / _diagram.Zoom;
var positionY = _originalPosition.Y;

if (width < _nodeModel.MinimumDimensions.Width)
Expand All @@ -65,10 +68,11 @@ public void OnPointerMove(Model? model, PointerEventArgs args)
public void OnResizeEnd(Model? model, PointerEventArgs args)
{
_nodeModel?.TriggerSizeChanged();
_originalSize = null!;
_originalPosition = null!;
_originalMousePosition = null!;
_nodeModel = null!;
_originalSize = null;
_originalPosition = null;
_originalMousePosition = null;
_nodeModel = null;
_diagram = null;
}

}
Expand Down
25 changes: 14 additions & 11 deletions src/Blazor.Diagrams.Core/Positions/Resizing/BottomRightResizerProvider.cs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -9,11 +9,12 @@ public class BottomRightResizerProvider : IResizerProvider
{
public string? Class => "bottomright";

private Size _originalSize = null!;
private Point _originalMousePosition = null!;
private NodeModel _nodeModel = null!;
private Size? _originalSize;
private Point? _originalMousePosition;
private NodeModel? _nodeModel;
private Diagram? _diagram;

public Point? GetPosition(Model model)
public Point? GetPosition(Model model)
{
if (model is NodeModel nodeModel && nodeModel.Size is not null)
{
Expand All @@ -27,20 +28,21 @@ public void OnResizeStart(Diagram diagram, Model model, PointerEventArgs eventAr
if (model is NodeModel nodeModel)
{
_originalMousePosition = new Point(eventArgs.ClientX, eventArgs.ClientY);
_originalSize = nodeModel.Size!;
_originalSize = nodeModel.Size;
_nodeModel = nodeModel;
_diagram = diagram;
}
}

public void OnPointerMove(Model? model, PointerEventArgs args)
{
if (_nodeModel is null)
if (_originalSize is null || _originalMousePosition is null || _nodeModel is null || _diagram is null)
{
return;
}

var height = _originalSize.Height + (args.ClientY - _originalMousePosition.Y);
var width = _originalSize.Width + (args.ClientX - _originalMousePosition.X);
var height = _originalSize.Height + (args.ClientY - _originalMousePosition.Y) / _diagram.Zoom;
var width = _originalSize.Width + (args.ClientX - _originalMousePosition.X) / _diagram.Zoom;

if (width < _nodeModel.MinimumDimensions.Width)
{
Expand All @@ -57,9 +59,10 @@ public void OnPointerMove(Model? model, PointerEventArgs args)
public void OnResizeEnd(Model? model, PointerEventArgs args)
{
_nodeModel?.TriggerSizeChanged();
_originalSize = null!;
_originalMousePosition = null!;
_nodeModel = null!;
_originalSize = null;
_originalMousePosition = null;
_nodeModel = null;
_diagram = null;
}

}
Expand Down
33 changes: 18 additions & 15 deletions src/Blazor.Diagrams.Core/Positions/Resizing/TopLeftResizerProvider.cs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -7,12 +7,13 @@ namespace Blazor.Diagrams.Core.Positions.Resizing
{
public class TopLeftResizerProvider : IResizerProvider
{
public string? Class => "topleft";
public string? Class => "topleft";

private Size _originalSize = null!;
private Point _originalPosition = null!;
private Point _originalMousePosition = null!;
private NodeModel _nodeModel = null!;
private Size? _originalSize;
private Point? _originalPosition;
private Point? _originalMousePosition;
private NodeModel? _nodeModel;
private Diagram? _diagram;

public Point? GetPosition(Model model)
{
Expand All @@ -29,23 +30,24 @@ public void OnResizeStart(Diagram diagram, Model model, PointerEventArgs eventAr
{
_originalPosition = new Point(nodeModel.Position.X, nodeModel.Position.Y);
_originalMousePosition = new Point(eventArgs.ClientX, eventArgs.ClientY);
_originalSize = nodeModel.Size!;
_originalSize = nodeModel.Size;
_nodeModel = nodeModel;
_diagram = diagram;
}
}

public void OnPointerMove(Model? model, PointerEventArgs args)
{
if (_nodeModel is null)
if (_originalSize is null || _originalPosition is null || _originalMousePosition is null || _nodeModel is null || _diagram is null)
{
return;
}

var height = _originalSize.Height - (args.ClientY - _originalMousePosition.Y);
var width = _originalSize.Width - (args.ClientX - _originalMousePosition.X);
var height = _originalSize.Height - (args.ClientY - _originalMousePosition.Y) / _diagram.Zoom;
var width = _originalSize.Width - (args.ClientX - _originalMousePosition.X) / _diagram.Zoom;

var positionX = _originalPosition.X + (args.ClientX - _originalMousePosition.X);
var positionY = _originalPosition.Y + (args.ClientY - _originalMousePosition.Y);
var positionX = _originalPosition.X + (args.ClientX - _originalMousePosition.X) / _diagram.Zoom;
var positionY = _originalPosition.Y + (args.ClientY - _originalMousePosition.Y) / _diagram.Zoom;

if (width < _nodeModel.MinimumDimensions.Width)
{
Expand All @@ -65,10 +67,11 @@ public void OnPointerMove(Model? model, PointerEventArgs args)
public void OnResizeEnd(Model? model, PointerEventArgs args)
{
_nodeModel?.TriggerSizeChanged();
_originalSize = null!;
_originalPosition = null!;
_originalMousePosition = null!;
_nodeModel = null!;
_originalSize = null;
_originalPosition = null;
_originalMousePosition = null;
_nodeModel = null;
_diagram = null;
}

}
Expand Down
34 changes: 19 additions & 15 deletions src/Blazor.Diagrams.Core/Positions/Resizing/TopRightResizerProvider.cs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -7,12 +7,13 @@ namespace Blazor.Diagrams.Core.Positions.Resizing
{
public class TopRightResizerProvider : IResizerProvider
{
public string? Class => "topright";
public string? Class => "topright";

private Size _originalSize = null!;
private Point _originalPosition = null!;
private Point _originalMousePosition = null!;
private NodeModel _nodeModel = null!;
private Size? _originalSize;
private Point? _originalPosition;
private Point? _originalMousePosition;
private NodeModel? _nodeModel;
private Diagram? _diagram;

public Point? GetPosition(Model model)
{
Expand All @@ -29,22 +30,24 @@ public void OnResizeStart(Diagram diagram, Model model, PointerEventArgs eventAr
{
_originalPosition = new Point(nodeModel.Position.X, nodeModel.Position.Y);
_originalMousePosition = new Point(eventArgs.ClientX, eventArgs.ClientY);
_originalSize = nodeModel.Size!;
_originalSize = nodeModel.Size;
_nodeModel = nodeModel;
_diagram = diagram;
}
}

public void OnPointerMove(Model? model, PointerEventArgs args)
{
if (_nodeModel is null)
if (_originalSize is null || _originalPosition is null || _originalMousePosition is null || _nodeModel is null || _diagram is null)
{
return;
}
var height = _originalSize.Height - (args.ClientY - _originalMousePosition.Y);
var width = _originalSize.Width + (args.ClientX - _originalMousePosition.X);

var height = _originalSize.Height - (args.ClientY - _originalMousePosition.Y) / _diagram.Zoom;
var width = _originalSize.Width + (args.ClientX - _originalMousePosition.X) / _diagram.Zoom;

var positionX = _originalPosition.X;
var positionY = _originalPosition.Y + (args.ClientY - _originalMousePosition.Y);
var positionY = _originalPosition.Y + (args.ClientY - _originalMousePosition.Y) / _diagram.Zoom;

if (width < _nodeModel.MinimumDimensions.Width)
{
Expand All @@ -64,11 +67,12 @@ public void OnPointerMove(Model? model, PointerEventArgs args)
public void OnResizeEnd(Model? model, PointerEventArgs args)
{
_nodeModel?.TriggerSizeChanged();
_originalSize = null!;
_originalPosition = null!;
_originalMousePosition = null!;
_nodeModel = null!;
_originalSize = null;
_originalPosition = null;
_originalMousePosition = null;
_nodeModel = null;
_diagram = null;
}

}
}
}
103 changes: 51 additions & 52 deletions tests/Blazor.Diagrams.Core.Tests/Controls/ResizeControlTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -5,71 +5,70 @@
using Moq;
using Xunit;

namespace Blazor.Diagrams.Core.Tests.Controls
namespace Blazor.Diagrams.Core.Tests.Controls;

public class ResizeControlTests
{
public class ResizeControlTests
[Fact]
public void GetPosition_ShouldUseResizeProviderGetPosition()
{
[Fact]
public void GetPosition_ShouldUseResizeProviderGetPosition()
{
var resizeProvider = new Mock<IResizerProvider>();
var control = new ResizeControl(resizeProvider.Object);
var model = new Mock<Model>();
var resizeProvider = new Mock<IResizerProvider>();
var control = new ResizeControl(resizeProvider.Object);
var model = new Mock<Model>();

control.GetPosition(model.Object);
control.GetPosition(model.Object);

resizeProvider.Verify(m => m.GetPosition(model.Object), Times.Once);
}
resizeProvider.Verify(m => m.GetPosition(model.Object), Times.Once);
}

[Fact]
public void OnPointerDown_ShouldInvokeResizeStart()
{
var resizeProvider = new Mock<IResizerProvider>();
var control = new ResizeControl(resizeProvider.Object);
var diagram = Mock.Of<Diagram>();
var model = Mock.Of<Model>();
var eventArgs = new PointerEventArgs(0, 0, 0, 0, false, false, false, 0, 0, 0, 0, 0, 0, string.Empty, true);
[Fact]
public void OnPointerDown_ShouldInvokeResizeStart()
{
var resizeProvider = new Mock<IResizerProvider>();
var control = new ResizeControl(resizeProvider.Object);
var diagram = Mock.Of<Diagram>();
var model = Mock.Of<Model>();
var eventArgs = new PointerEventArgs(0, 0, 0, 0, false, false, false, 0, 0, 0, 0, 0, 0, string.Empty, true);

control.OnPointerDown(diagram, model, eventArgs);
control.OnPointerDown(diagram, model, eventArgs);

resizeProvider.Verify(m => m.OnResizeStart(diagram, model, eventArgs), Times.Once);
}
resizeProvider.Verify(m => m.OnResizeStart(diagram, model, eventArgs), Times.Once);
}

[Fact]
public void OnPointerDown_ShouldAddEventHandlers()
{
var resizeProvider = new Mock<IResizerProvider>();
var control = new ResizeControl(resizeProvider.Object);
var diagram = new TestDiagram();
var model = Mock.Of<Model>();
var eventArgs = new PointerEventArgs(0, 0, 0, 0, false, false, false, 0, 0, 0, 0, 0, 0, string.Empty, true);
[Fact]
public void OnPointerDown_ShouldAddEventHandlers()
{
var resizeProvider = new Mock<IResizerProvider>();
var control = new ResizeControl(resizeProvider.Object);
var diagram = new TestDiagram();
var model = Mock.Of<Model>();
var eventArgs = new PointerEventArgs(0, 0, 0, 0, false, false, false, 0, 0, 0, 0, 0, 0, string.Empty, true);

control.OnPointerDown(diagram, model, eventArgs);
diagram.TriggerPointerMove(model, eventArgs);
resizeProvider.Verify(m => m.OnPointerMove(model, eventArgs), Times.Once);
control.OnPointerDown(diagram, model, eventArgs);

diagram.TriggerPointerMove(model, eventArgs);
resizeProvider.Verify(m => m.OnPointerMove(model, eventArgs), Times.Once);

diagram.TriggerPointerUp(model, eventArgs);
resizeProvider.Verify(m => m.OnResizeEnd(model, eventArgs), Times.Once);
}
diagram.TriggerPointerUp(model, eventArgs);
resizeProvider.Verify(m => m.OnResizeEnd(model, eventArgs), Times.Once);
}

[Fact]
public void OnPointerUp_ShouldRemoveEventHandlers()
{
var resizeProvider = new Mock<IResizerProvider>();
var control = new ResizeControl(resizeProvider.Object);
var diagram = new TestDiagram();
var model = Mock.Of<Model>();
var eventArgs = new PointerEventArgs(0, 0, 0, 0, false, false, false, 0, 0, 0, 0, 0, 0, string.Empty, true);
[Fact]
public void OnPointerUp_ShouldRemoveEventHandlers()
{
var resizeProvider = new Mock<IResizerProvider>();
var control = new ResizeControl(resizeProvider.Object);
var diagram = new TestDiagram();
var model = Mock.Of<Model>();
var eventArgs = new PointerEventArgs(0, 0, 0, 0, false, false, false, 0, 0, 0, 0, 0, 0, string.Empty, true);

control.OnPointerDown(diagram, model, eventArgs);
diagram.TriggerPointerUp(model, eventArgs);
control.OnPointerDown(diagram, model, eventArgs);
diagram.TriggerPointerUp(model, eventArgs);

diagram.TriggerPointerMove(model, eventArgs);
resizeProvider.Verify(m => m.OnPointerMove(model, eventArgs), Times.Never);
diagram.TriggerPointerMove(model, eventArgs);
resizeProvider.Verify(m => m.OnPointerMove(model, eventArgs), Times.Never);

diagram.TriggerPointerUp(model, eventArgs);
resizeProvider.Verify(m => m.OnResizeEnd(model, eventArgs), Times.Once);
}
diagram.TriggerPointerUp(model, eventArgs);
resizeProvider.Verify(m => m.OnResizeEnd(model, eventArgs), Times.Once);
}
}
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