621 lines
No EOL
24 KiB
C#
621 lines
No EOL
24 KiB
C#
/*
|
|
Copyright (c) 2018, Lars Brubaker, John Lewin
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright notice, this
|
|
list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright notice,
|
|
this list of conditions and the following disclaimer in the documentation
|
|
and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
|
|
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
The views and conclusions contained in the software and documentation are those
|
|
of the authors and should not be interpreted as representing official policies,
|
|
either expressed or implied, of the FreeBSD Project.
|
|
*/
|
|
|
|
using MatterHackers.Agg;
|
|
using MatterHackers.Agg.Platform;
|
|
using MatterHackers.Agg.Transform;
|
|
using MatterHackers.Agg.UI;
|
|
using MatterHackers.Agg.VertexSource;
|
|
using MatterHackers.ImageProcessing;
|
|
using MatterHackers.Localizations;
|
|
using MatterHackers.MatterControl.SlicerConfiguration;
|
|
using MatterHackers.VectorMath;
|
|
using System;
|
|
using System.Linq;
|
|
using System.Reflection;
|
|
|
|
namespace MatterHackers.MatterControl.DesignTools
|
|
{
|
|
interface IPathEditorDraw
|
|
{
|
|
void BeforePathEditorDraw(Graphics2D graphics2D, PathEditorWidget pathEditorWidget);
|
|
}
|
|
|
|
public class PathEditorWidget : GuiWidget
|
|
{
|
|
public enum ETransformState
|
|
{
|
|
Edit,
|
|
Move,
|
|
Scale
|
|
};
|
|
|
|
public enum ControlPointConstraint
|
|
{
|
|
Sharp,
|
|
Aligned,
|
|
Free
|
|
}
|
|
|
|
private Vector2 lastMousePosition = new Vector2(0, 0);
|
|
private ETransformState mouseDownTransformOverride;
|
|
private Vector2 mouseDownPosition = new Vector2(0, 0);
|
|
private Action<Vector2, double> scaleChanged;
|
|
private ThemeConfig theme;
|
|
|
|
private Vector2 unscaledRenderOffset = new Vector2(0, 0);
|
|
private Action vertexChanged;
|
|
|
|
private VertexStorage vertexStorage;
|
|
|
|
// the last vertex storage before the last change
|
|
private VertexStorage beforeLastChange;
|
|
|
|
private ControlPointConstraint controlPointConstraint = ControlPointConstraint.Free;
|
|
|
|
public PathEditorWidget(VertexStorage vertexStorage,
|
|
EditableProperty editableProperty,
|
|
UndoBuffer undoBuffer,
|
|
ThemeConfig theme,
|
|
Action vertexChanged,
|
|
ref int tabIndex,
|
|
Vector2 unscaledRenderOffset = default,
|
|
double layerScale = 1,
|
|
Action<Vector2, double> scaleChanged = null)
|
|
{
|
|
this.editableProperty = editableProperty;
|
|
// remember the initial tab index
|
|
initialTabIndex = tabIndex;
|
|
// and add to the tab index the number of controls we plan to add
|
|
tabIndex += 2;
|
|
|
|
HAnchor = HAnchor.Stretch;
|
|
BackgroundOutlineWidth = 1;
|
|
BackgroundColor = theme.BackgroundColor;
|
|
BorderColor = theme.TextColor;
|
|
Margin = 1;
|
|
|
|
this.unscaledRenderOffset = unscaledRenderOffset;
|
|
this.layerScale = layerScale;
|
|
this.undoBuffer = undoBuffer;
|
|
|
|
var topToBottom = this;
|
|
|
|
this.scaleChanged = scaleChanged;
|
|
|
|
SizeChanged += (s, e) =>
|
|
{
|
|
Height = Width * 6 / 9;
|
|
};
|
|
|
|
this.vertexChanged = vertexChanged;
|
|
this.theme = theme;
|
|
this.vertexStorage = vertexStorage;
|
|
this.beforeLastChange = new VertexStorage();
|
|
beforeLastChange.SvgDString = vertexStorage.SvgDString;
|
|
|
|
var toolBar = new FlowLayoutWidget()
|
|
{
|
|
HAnchor = HAnchor.Stretch,
|
|
Margin = 5,
|
|
BackgroundColor = theme.TextColor.WithAlpha(20),
|
|
};
|
|
|
|
toolBar.VAnchor |= VAnchor.Bottom;
|
|
|
|
this.AddChild(toolBar);
|
|
|
|
AddControlsToToolBar(theme, toolBar);
|
|
}
|
|
|
|
private void AddControlsToToolBar(ThemeConfig theme, FlowLayoutWidget toolBar)
|
|
{
|
|
AddButtons(theme, toolBar);
|
|
|
|
toolBar.AddChild(new HorizontalSpacer());
|
|
|
|
AddPositionControls(theme, toolBar);
|
|
}
|
|
|
|
public static readonly int VectorXYEditWidth = (int)(60 * GuiWidget.DeviceScale + .5);
|
|
|
|
private void AddPositionControls(ThemeConfig theme, FlowLayoutWidget toolBar)
|
|
{
|
|
var tabIndex = initialTabIndex;
|
|
xEditWidget = new ThemedNumberEdit(0, theme, singleCharLabel: 'X', allowNegatives: true, allowDecimals: true, pixelWidth: VectorXYEditWidth)
|
|
{
|
|
TabIndex = tabIndex++,
|
|
SelectAllOnFocus = true,
|
|
Margin = theme.ButtonSpacing,
|
|
VAnchor = VAnchor.Center,
|
|
Enabled = false,
|
|
};
|
|
xEditWidget.ActuallNumberEdit.InternalNumberEdit.MaxDecimalsPlaces = 3;
|
|
xEditWidget.ActuallNumberEdit.EditComplete += (sender, e) =>
|
|
{
|
|
var oldPosition = vertexStorage[controlPointBeingDragged].Position;
|
|
var newPosition = new Vector2(xEditWidget.ActuallNumberEdit.Value, yEditWidget.ActuallNumberEdit.Value);
|
|
var delta = newPosition - oldPosition;
|
|
OffsetSelectedPoint(delta, true);
|
|
};
|
|
|
|
xEditWidget.ActuallNumberEdit.KeyDown += NumberField.InternalTextEditWidget_KeyDown;
|
|
toolBar.AddChild(xEditWidget);
|
|
|
|
yEditWidget = new ThemedNumberEdit(0, theme, 'Y', allowNegatives: true, allowDecimals: true, pixelWidth: VectorXYEditWidth)
|
|
{
|
|
TabIndex = tabIndex++,
|
|
SelectAllOnFocus = true,
|
|
VAnchor = VAnchor.Center,
|
|
Margin = theme.ButtonSpacing,
|
|
Enabled = false,
|
|
};
|
|
yEditWidget.ActuallNumberEdit.InternalNumberEdit.MaxDecimalsPlaces = 3;
|
|
yEditWidget.ActuallNumberEdit.EditComplete += (sender, e) =>
|
|
{
|
|
var oldPosition = vertexStorage[controlPointBeingDragged].Position;
|
|
var newPosition = new Vector2(xEditWidget.ActuallNumberEdit.Value, yEditWidget.ActuallNumberEdit.Value);
|
|
var delta = newPosition - oldPosition;
|
|
OffsetSelectedPoint(delta, true);
|
|
};
|
|
yEditWidget.ActuallNumberEdit.KeyDown += NumberField.InternalTextEditWidget_KeyDown;
|
|
|
|
toolBar.AddChild(yEditWidget);
|
|
}
|
|
|
|
private void AddButtons(ThemeConfig theme, FlowLayoutWidget toolBar)
|
|
{
|
|
var homeButton = new ThemedIconButton(StaticData.Instance.LoadIcon("fa-home_16.png", 16, 16).GrayToColor(theme.TextColor), theme)
|
|
{
|
|
BackgroundColor = theme.SlightShade,
|
|
HoverColor = theme.SlightShade.WithAlpha(75),
|
|
Margin = new BorderDouble(3, 3, 6, 3),
|
|
ToolTipText = "Reset Zoom".Localize()
|
|
};
|
|
toolBar.AddChild(homeButton);
|
|
|
|
homeButton.Click += (s, e) =>
|
|
{
|
|
CenterPartInView();
|
|
};
|
|
|
|
// the sharp corner button
|
|
sharpButton = new ThemedRadioTextButton("S", theme)
|
|
{
|
|
BackgroundColor = theme.SlightShade,
|
|
HoverColor = theme.SlightShade.WithAlpha(75),
|
|
Margin = new BorderDouble(3, 3, 6, 3),
|
|
ToolTipText = "Sharp Corner".Localize(),
|
|
Checked = controlPointConstraint == ControlPointConstraint.Sharp,
|
|
};
|
|
toolBar.AddChild(sharpButton);
|
|
|
|
sharpButton.Click += (s, e) => { controlPointConstraint = ControlPointConstraint.Sharp; };
|
|
|
|
// the aligned corner button
|
|
alignedButton = new ThemedRadioTextButton("A", theme)
|
|
{
|
|
BackgroundColor = theme.SlightShade,
|
|
HoverColor = theme.SlightShade.WithAlpha(75),
|
|
Margin = new BorderDouble(3, 3, 6, 3),
|
|
ToolTipText = "Aligned Corner".Localize(),
|
|
Checked = controlPointConstraint == ControlPointConstraint.Aligned,
|
|
};
|
|
toolBar.AddChild(alignedButton);
|
|
|
|
alignedButton.Click += (s, e) => { controlPointConstraint = ControlPointConstraint.Aligned; };
|
|
|
|
// the free button
|
|
freeButton = new ThemedRadioTextButton("F", theme)
|
|
{
|
|
BackgroundColor = theme.SlightShade,
|
|
HoverColor = theme.SlightShade.WithAlpha(75),
|
|
Margin = new BorderDouble(3, 3, 6, 3),
|
|
ToolTipText = "Free".Localize(),
|
|
Checked = controlPointConstraint == ControlPointConstraint.Free,
|
|
};
|
|
toolBar.AddChild(freeButton);
|
|
|
|
freeButton.Click += (s, e) => { controlPointConstraint = ControlPointConstraint.Free; };
|
|
}
|
|
|
|
public ETransformState TransformState { get; set; }
|
|
private double layerScale { get; set; } = 1;
|
|
|
|
private UndoBuffer undoBuffer;
|
|
|
|
private Affine ScalingTransform => Affine.NewScaling(layerScale, layerScale);
|
|
public Affine TotalTransform => Affine.NewTranslation(unscaledRenderOffset) * ScalingTransform * Affine.NewTranslation(Width / 2, Height / 2);
|
|
|
|
private int controlPointBeingDragged = -1;
|
|
private int selectedPointIndex;
|
|
private int controlPointBeingHovered = -1;
|
|
private ThemedNumberEdit yEditWidget;
|
|
private ThemedNumberEdit xEditWidget;
|
|
private EditableProperty editableProperty;
|
|
private int initialTabIndex;
|
|
private ThemedRadioTextButton sharpButton;
|
|
private ThemedRadioTextButton alignedButton;
|
|
private ThemedRadioTextButton freeButton;
|
|
private bool hasBeenStartupPositioned;
|
|
|
|
public void CenterPartInView()
|
|
{
|
|
if (vertexStorage != null)
|
|
{
|
|
var partBounds = vertexStorage.GetBounds();
|
|
var weightedCenter = partBounds.Center;
|
|
|
|
var bottomPixels = 20;
|
|
var margin = 30;
|
|
unscaledRenderOffset = -weightedCenter;
|
|
layerScale = Math.Min((Height - margin - bottomPixels * 2) / partBounds.Height, (Width - margin) / partBounds.Width);
|
|
unscaledRenderOffset += new Vector2(0, bottomPixels) / layerScale;
|
|
|
|
Invalidate();
|
|
scaleChanged?.Invoke(unscaledRenderOffset, layerScale);
|
|
}
|
|
}
|
|
|
|
public override void OnDraw(Graphics2D graphics2D)
|
|
{
|
|
if (!hasBeenStartupPositioned)
|
|
{
|
|
if (unscaledRenderOffset == Vector2.Zero
|
|
&& layerScale == 1)
|
|
{
|
|
CenterPartInView();
|
|
}
|
|
hasBeenStartupPositioned = true;
|
|
}
|
|
|
|
if(editableProperty.Source is IPathEditorDraw pathEditorDraw)
|
|
{
|
|
pathEditorDraw.BeforePathEditorDraw(graphics2D, this);
|
|
}
|
|
|
|
new VertexSourceApplyTransform(vertexStorage, TotalTransform).RenderPath(graphics2D, theme.TextColor, 2, true, theme.PrimaryAccentColor.Blend(theme.TextColor, .5), theme.PrimaryAccentColor);
|
|
|
|
if(editableProperty.PropertyInfo.GetCustomAttributes(true).OfType<PathEditorFactory.ShowOriginAttribute>().FirstOrDefault() is PathEditorFactory.ShowOriginAttribute showAxisAttribute)
|
|
{
|
|
var leftOrigin = new Vector2(-10000, 0);
|
|
var rightOrigin = new Vector2(10000, 0);
|
|
graphics2D.Line(TotalTransform.Transform(leftOrigin), TotalTransform.Transform(rightOrigin), Color.Red);
|
|
var bottomOrigin = new Vector2(0, -10000);
|
|
var topOrigin = new Vector2(0, 10000);
|
|
graphics2D.Line(TotalTransform.Transform(bottomOrigin), TotalTransform.Transform(topOrigin), Color.Green);
|
|
}
|
|
|
|
base.OnDraw(graphics2D);
|
|
}
|
|
|
|
public override void OnMouseDown(MouseEventArgs mouseEvent)
|
|
{
|
|
base.OnMouseDown(mouseEvent);
|
|
if (MouseCaptured)
|
|
{
|
|
controlPointBeingDragged = -1;
|
|
|
|
mouseDownPosition.X = mouseEvent.X;
|
|
mouseDownPosition.Y = mouseEvent.Y;
|
|
|
|
lastMousePosition = mouseDownPosition;
|
|
|
|
mouseDownTransformOverride = TransformState;
|
|
|
|
// check if not left button
|
|
switch (mouseEvent.Button)
|
|
{
|
|
case MouseButtons.Left:
|
|
if (Keyboard.IsKeyDown(Keys.ControlKey))
|
|
{
|
|
if (Keyboard.IsKeyDown(Keys.Alt))
|
|
{
|
|
mouseDownTransformOverride = ETransformState.Scale;
|
|
}
|
|
else
|
|
{
|
|
mouseDownTransformOverride = ETransformState.Move;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// we are in edit mode, check if we are over any control points
|
|
controlPointBeingDragged = GetControlPointIndex(mouseEvent.Position);
|
|
selectedPointIndex = controlPointBeingDragged;
|
|
|
|
if (selectedPointIndex == -1)
|
|
{
|
|
xEditWidget.Text = "---";
|
|
xEditWidget.Enabled= false;
|
|
yEditWidget.Text = "---";
|
|
yEditWidget.Enabled= false;
|
|
|
|
sharpButton.Enabled = false;
|
|
alignedButton.Enabled = false;
|
|
freeButton.Enabled = false;
|
|
}
|
|
else
|
|
{
|
|
UpdateControlsForSelection();
|
|
}
|
|
}
|
|
break;
|
|
|
|
case MouseButtons.Middle:
|
|
case MouseButtons.Right:
|
|
if (Keyboard.IsKeyDown(Keys.ControlKey))
|
|
{
|
|
mouseDownTransformOverride = ETransformState.Scale;
|
|
}
|
|
else
|
|
{
|
|
mouseDownTransformOverride = ETransformState.Move;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
private void UpdateControlsForSelection()
|
|
{
|
|
xEditWidget.Enabled = true;
|
|
yEditWidget.Enabled = true;
|
|
sharpButton.Enabled = true;
|
|
alignedButton.Enabled = true;
|
|
freeButton.Enabled = true;
|
|
|
|
var selected = vertexStorage[controlPointBeingDragged];
|
|
xEditWidget.Value = selected.Position.X;
|
|
yEditWidget.Value = selected.Position.Y;
|
|
|
|
switch(selected.Hint)
|
|
{
|
|
case CommandHint.C4Point:
|
|
case CommandHint.C4ControlToPoint:
|
|
case CommandHint.C4ControlFromPrev:
|
|
freeButton.Checked = true;
|
|
break;
|
|
|
|
default:
|
|
if (selected.IsMoveTo
|
|
|| selected.IsLineTo)
|
|
{
|
|
sharpButton.Checked = true;
|
|
}
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
private int GetControlPointIndex(Vector2 mousePosition)
|
|
{
|
|
double hitThreshold = 10; // Threshold for considering a hit, in screen pixels
|
|
|
|
for (int i = 0; i < vertexStorage.Count; i++)
|
|
{
|
|
Vector2 controlPoint = vertexStorage[i].Position + unscaledRenderOffset;
|
|
ScalingTransform.transform(ref controlPoint);
|
|
// we center on the scren so we have to add that in after scaling
|
|
controlPoint += new Vector2(Width / 2, Height / 2);
|
|
|
|
if ((controlPoint - mousePosition).Length <= hitThreshold) // Check if the mouse position is within the threshold
|
|
{
|
|
return i; // Control point index
|
|
}
|
|
}
|
|
|
|
return -1; // No control point found at this position
|
|
}
|
|
|
|
public override void OnMouseMove(MouseEventArgs mouseEvent)
|
|
{
|
|
base.OnMouseMove(mouseEvent);
|
|
|
|
if (MouseCaptured)
|
|
{
|
|
DoTranslateAndZoom(mouseEvent);
|
|
|
|
if (controlPointBeingDragged > -1)
|
|
{
|
|
// we are dragging a control point
|
|
var mouseDelta = mouseEvent.Position - lastMousePosition;
|
|
if (mouseDelta.LengthSquared > 0)
|
|
{
|
|
ScalingTransform.inverse_transform(ref mouseDelta);
|
|
OffsetSelectedPoint(mouseDelta, false);
|
|
UpdateControlsForSelection();
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// highlight any contorl points we are over
|
|
}
|
|
|
|
lastMousePosition = mouseEvent.Position;
|
|
}
|
|
|
|
public override void OnMouseUp(MouseEventArgs mouseEvent)
|
|
{
|
|
OffsetSelectedPoint(new Vector2(), true);
|
|
base.OnMouseUp(mouseEvent);
|
|
}
|
|
|
|
private void OffsetSelectedPoint(Vector2 delta, bool recordUndo)
|
|
{
|
|
if (controlPointBeingDragged < 0
|
|
|| controlPointBeingDragged >= vertexStorage.Count)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (delta.LengthSquared > 0)
|
|
{
|
|
var vertexData = vertexStorage[controlPointBeingDragged];
|
|
|
|
if (vertexData.Hint == CommandHint.C4Point)
|
|
{
|
|
for (int i = -1; i < 2; i++)
|
|
{
|
|
var pointIndex = controlPointBeingDragged + i;
|
|
// the prev point
|
|
if (pointIndex > 0
|
|
&& pointIndex < vertexStorage.Count)
|
|
{
|
|
var vertexData2 = vertexStorage[pointIndex];
|
|
vertexStorage[pointIndex] = new VertexData(vertexData2.Command, vertexData2.Position + delta, vertexData2.Hint);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// drag the point
|
|
vertexStorage[controlPointBeingDragged] = new VertexData(vertexData.Command, vertexData.Position + delta, vertexData.Hint);
|
|
|
|
// and check if the next point is a c4 control point
|
|
var nextPointIndex = controlPointBeingDragged + 1;
|
|
if (nextPointIndex < vertexStorage.Count)
|
|
{
|
|
var nextVertexData = vertexStorage[nextPointIndex];
|
|
if (nextVertexData.Hint == CommandHint.C4ControlFromPrev)
|
|
{
|
|
vertexStorage[nextPointIndex] = new VertexData(nextVertexData.Command, nextVertexData.Position + delta, nextVertexData.Hint);
|
|
}
|
|
}
|
|
}
|
|
|
|
vertexChanged?.Invoke();
|
|
}
|
|
|
|
if (recordUndo)
|
|
{
|
|
var doVertexBuffer = new VertexStorage();
|
|
doVertexBuffer.SvgDString = vertexStorage.SvgDString;
|
|
|
|
var undoVertexBuffer = new VertexStorage();
|
|
undoVertexBuffer.SvgDString = beforeLastChange.SvgDString;
|
|
|
|
undoBuffer.AddAndDo(new UndoRedoActions(() =>
|
|
{
|
|
vertexStorage.SvgDString = undoVertexBuffer.SvgDString;
|
|
vertexChanged?.Invoke();
|
|
}, () =>
|
|
{
|
|
vertexStorage.SvgDString = doVertexBuffer.SvgDString;
|
|
vertexChanged?.Invoke();
|
|
}));
|
|
// record the change
|
|
beforeLastChange.SvgDString = vertexStorage.SvgDString;
|
|
}
|
|
}
|
|
|
|
private void DoTranslateAndZoom(MouseEventArgs mouseEvent)
|
|
{
|
|
var mousePos = new Vector2(mouseEvent.X, mouseEvent.Y);
|
|
var mouseDelta = mousePos - lastMousePosition;
|
|
|
|
switch (mouseDownTransformOverride)
|
|
{
|
|
case ETransformState.Scale:
|
|
double zoomDelta = 1;
|
|
if (mouseDelta.Y < 0)
|
|
{
|
|
zoomDelta = 1 - (-1 * mouseDelta.Y / 100);
|
|
}
|
|
else if (mouseDelta.Y > 0)
|
|
{
|
|
zoomDelta = 1 + (1 * mouseDelta.Y / 100);
|
|
}
|
|
|
|
var mousePreScale = mouseDownPosition;
|
|
TotalTransform.inverse_transform(ref mousePreScale);
|
|
|
|
layerScale *= zoomDelta;
|
|
|
|
var mousePostScale = mouseDownPosition;
|
|
TotalTransform.inverse_transform(ref mousePostScale);
|
|
|
|
unscaledRenderOffset += (mousePostScale - mousePreScale);
|
|
scaleChanged?.Invoke(unscaledRenderOffset, layerScale);
|
|
break;
|
|
|
|
case ETransformState.Move:
|
|
ScalingTransform.inverse_transform(ref mouseDelta);
|
|
|
|
unscaledRenderOffset += mouseDelta;
|
|
scaleChanged?.Invoke(unscaledRenderOffset, layerScale);
|
|
break;
|
|
|
|
case ETransformState.Edit:
|
|
default: // also treat everything else like an edit
|
|
break;
|
|
}
|
|
|
|
Invalidate();
|
|
}
|
|
|
|
public override void OnMouseWheel(MouseEventArgs mouseEvent)
|
|
{
|
|
base.OnMouseWheel(mouseEvent);
|
|
if (FirstWidgetUnderMouse) // TODO: find a good way to decide if you are what the wheel is trying to do
|
|
{
|
|
const double deltaFor1Click = 120;
|
|
double scaleAmount = (mouseEvent.WheelDelta / deltaFor1Click) * .1;
|
|
|
|
ScalePartAndFixPosition(mouseEvent, layerScale + layerScale * scaleAmount);
|
|
|
|
mouseEvent.WheelDelta = 0;
|
|
|
|
Invalidate();
|
|
}
|
|
}
|
|
|
|
public void Zoom(double scaleAmount)
|
|
{
|
|
ScalePartAndFixPosition(new MouseEventArgs(MouseButtons.None, 0, Width / 2, Height / 2, 0), layerScale * scaleAmount);
|
|
Invalidate();
|
|
}
|
|
|
|
private void ScalePartAndFixPosition(MouseEventArgs mouseEvent, double scaleAmount)
|
|
{
|
|
var mousePreScale = new Vector2(mouseEvent.X, mouseEvent.Y);
|
|
TotalTransform.inverse_transform(ref mousePreScale);
|
|
|
|
layerScale = scaleAmount;
|
|
|
|
var mousePostScale = new Vector2(mouseEvent.X, mouseEvent.Y);
|
|
TotalTransform.inverse_transform(ref mousePostScale);
|
|
|
|
unscaledRenderOffset += (mousePostScale - mousePreScale);
|
|
|
|
scaleChanged?.Invoke(unscaledRenderOffset, layerScale);
|
|
}
|
|
}
|
|
} |