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364 行
12 KiB

using System;
using UnityEngine;
using UnityEngine.UIElements;
using UnityEngine.UIElements.StyleSheets;
namespace UnityEditor.ShaderGraph.Drawing
{
enum ResizeDirection
{
Any,
Vertical,
Horizontal
}
enum ResizeHandleAnchor
{
Top,
TopRight,
Right,
BottomRight,
Bottom,
BottomLeft,
Left,
TopLeft
}
class ResizeSideHandle : ImmediateModeElement
{
VisualElement m_ResizeTarget;
VisualElement m_Container;
WindowDockingLayout m_WindowDockingLayout;
bool m_MaintainAspectRatio;
public bool maintainAspectRatio
{
get { return m_MaintainAspectRatio; }
set { m_MaintainAspectRatio = value; }
}
public Action OnResizeFinished;
bool m_Dragging;
Rect m_ResizeBeginLayout;
Vector2 m_ResizeBeginMousePosition;
private GUIStyle m_StyleWidget;
private GUIStyle m_StyleLabel;
private Texture image { get; set; }
public ResizeSideHandle(VisualElement resizeTarget, VisualElement container, ResizeHandleAnchor anchor)
{
m_WindowDockingLayout = new WindowDockingLayout();
m_ResizeTarget = resizeTarget;
m_Container = container;
AddToClassList("resize");
switch (anchor)
{
case ResizeHandleAnchor.Top:
{
AddToClassList("vertical");
AddToClassList("top");
RegisterCallback<MouseMoveEvent>(HandleResizeFromTop);
break;
}
case ResizeHandleAnchor.TopRight:
{
AddToClassList("diagonal");
AddToClassList("top-right");
RegisterCallback<MouseMoveEvent>(HandleResizeFromTopRight);
break;
}
case ResizeHandleAnchor.Right:
{
AddToClassList("horizontal");
AddToClassList("right");
RegisterCallback<MouseMoveEvent>(HandleResizeFromRight);
break;
}
case ResizeHandleAnchor.BottomRight:
{
AddToClassList("diagonal");
AddToClassList("bottom-right");
RegisterCallback<MouseMoveEvent>(HandleResizeFromBottomRight);
break;
}
case ResizeHandleAnchor.Bottom:
{
AddToClassList("vertical");
AddToClassList("bottom");
RegisterCallback<MouseMoveEvent>(HandleResizeFromBottom);
break;
}
case ResizeHandleAnchor.BottomLeft:
{
AddToClassList("diagonal");
AddToClassList("bottom-left");
RegisterCallback<MouseMoveEvent>(HandleResizeFromBottomLeft);
break;
}
case ResizeHandleAnchor.Left:
{
AddToClassList("horizontal");
AddToClassList("left");
RegisterCallback<MouseMoveEvent>(HandleResizeFromLeft);
break;
}
case ResizeHandleAnchor.TopLeft:
{
AddToClassList("diagonal");
AddToClassList("top-left");
RegisterCallback<MouseMoveEvent>(HandleResizeFromTopLeft);
break;
}
}
RegisterCallback<MouseDownEvent>(HandleMouseDown);
RegisterCallback<MouseUpEvent>(HandleDraggableMouseUp);
m_ResizeTarget.RegisterCallback<GeometryChangedEvent>(InitialLayoutSetup);
}
void InitialLayoutSetup(GeometryChangedEvent evt)
{
m_ResizeTarget.UnregisterCallback<GeometryChangedEvent>(InitialLayoutSetup);
}
void HandleResizeFromTop(MouseMoveEvent mouseMoveEvent)
{
if (!m_Dragging)
return;
Vector2 relativeMousePosition = mouseMoveEvent.mousePosition - m_ResizeBeginMousePosition;
// Set anchor points for positioning
m_Container.style.top = float.NaN;
m_Container.style.bottom = m_Container.parent.layout.height - m_Container.layout.yMax;
float newHeight = Mathf.Max(0f, m_ResizeBeginLayout.height - relativeMousePosition.y);
m_ResizeTarget.style.height = newHeight;
if (maintainAspectRatio)
m_ResizeTarget.style.width = newHeight;
mouseMoveEvent.StopImmediatePropagation();
}
void HandleResizeFromTopRight(MouseMoveEvent mouseMoveEvent)
{
if (!m_Dragging)
return;
Vector2 relativeMousePosition = mouseMoveEvent.mousePosition - m_ResizeBeginMousePosition;
// Set anchor points for positioning
m_Container.style.top = float.NaN;
m_Container.style.bottom = m_Container.parent.layout.height - m_Container.layout.yMax;
m_Container.style.left = m_Container.layout.xMin;
m_Container.style.right = float.NaN;
float newWidth = Mathf.Max(0f, m_ResizeBeginLayout.width + relativeMousePosition.x);
float newHeight = Mathf.Max(0f, m_ResizeBeginLayout.height - relativeMousePosition.y);
if (maintainAspectRatio)
newWidth = newHeight = Mathf.Min(newWidth, newHeight);
m_ResizeTarget.style.width = newWidth;
m_ResizeTarget.style.height = newHeight;
mouseMoveEvent.StopPropagation();
}
void HandleResizeFromRight(MouseMoveEvent mouseMoveEvent)
{
if (!m_Dragging)
return;
Vector2 relativeMousePosition = mouseMoveEvent.mousePosition - m_ResizeBeginMousePosition;
// Set anchor points for positioning
m_Container.style.left = m_Container.layout.xMin;
m_Container.style.right = float.NaN;
float newWidth = Mathf.Max(0f, m_ResizeBeginLayout.width + relativeMousePosition.x);
m_ResizeTarget.style.width = newWidth;
if (maintainAspectRatio)
{
m_ResizeTarget.style.height = newWidth;
}
mouseMoveEvent.StopPropagation();
}
void HandleResizeFromBottomRight(MouseMoveEvent mouseMoveEvent)
{
if (!m_Dragging)
return;
Vector2 relativeMousePosition = mouseMoveEvent.mousePosition - m_ResizeBeginMousePosition;
// Set anchor points for positioning
m_Container.style.top = m_Container.layout.yMin;
m_Container.style.bottom = float.NaN;
m_Container.style.left = m_Container.layout.xMin;
m_Container.style.right = float.NaN;
float newWidth = Mathf.Max(0f, m_ResizeBeginLayout.width + relativeMousePosition.x);
float newHeight = Mathf.Max(0f, m_ResizeBeginLayout.height + relativeMousePosition.y);
if (maintainAspectRatio)
newWidth = newHeight = Mathf.Min(newWidth, newHeight);
m_ResizeTarget.style.width = newWidth;
m_ResizeTarget.style.height = newHeight;
mouseMoveEvent.StopPropagation();
}
void HandleResizeFromBottom(MouseMoveEvent mouseMoveEvent)
{
if (!m_Dragging)
return;
Vector2 relativeMousePosition = mouseMoveEvent.mousePosition - m_ResizeBeginMousePosition;
// Set anchor points for positioning
m_Container.style.top = m_Container.layout.yMin;
m_Container.style.bottom = float.NaN;
float newHeight = Mathf.Max(0f, m_ResizeBeginLayout.height + relativeMousePosition.y);
m_ResizeTarget.style.height = newHeight;
if (maintainAspectRatio)
m_ResizeTarget.style.width = newHeight;
mouseMoveEvent.StopPropagation();
}
void HandleResizeFromBottomLeft(MouseMoveEvent mouseMoveEvent)
{
if (!m_Dragging)
return;
Vector2 relativeMousePosition = mouseMoveEvent.mousePosition - m_ResizeBeginMousePosition;
// Set anchor points for positioning
m_Container.style.top = m_Container.layout.yMin;
m_Container.style.bottom = float.NaN;
m_Container.style.left = float.NaN;
m_Container.style.right = m_Container.parent.layout.width - m_Container.layout.xMax;
float newWidth = Mathf.Max(0f, m_ResizeBeginLayout.width - relativeMousePosition.x);
float newHeight = Mathf.Max(0f, m_ResizeBeginLayout.height + relativeMousePosition.y);
if (maintainAspectRatio)
newWidth = newHeight = Mathf.Min(newWidth, newHeight);
m_ResizeTarget.style.width = newWidth;
m_ResizeTarget.style.height = newHeight;
mouseMoveEvent.StopPropagation();
}
void HandleResizeFromLeft(MouseMoveEvent mouseMoveEvent)
{
if (!m_Dragging)
return;
Vector2 relativeMousePosition = mouseMoveEvent.mousePosition - m_ResizeBeginMousePosition;
// Set anchor points for positioning
m_Container.style.left = float.NaN;
m_Container.style.right = m_Container.parent.layout.width - m_Container.layout.xMax;
float newWidth = Mathf.Max(0f, m_ResizeBeginLayout.width - relativeMousePosition.x);
m_ResizeTarget.style.width = newWidth;
if (maintainAspectRatio)
m_ResizeTarget.style.height = newWidth;
mouseMoveEvent.StopPropagation();
}
void HandleResizeFromTopLeft(MouseMoveEvent mouseMoveEvent)
{
if (!m_Dragging)
return;
Vector2 relativeMousePosition = mouseMoveEvent.mousePosition - m_ResizeBeginMousePosition;
// Set anchor points for positioning
m_Container.style.top = float.NaN;
m_Container.style.bottom = m_Container.parent.layout.height - m_Container.layout.yMax;
m_Container.style.left = float.NaN;
m_Container.style.right = m_Container.parent.layout.width - m_Container.layout.xMax;
float newWidth = Mathf.Max(0f, m_ResizeBeginLayout.width - relativeMousePosition.x);
float newHeight = Mathf.Max(0f, m_ResizeBeginLayout.height - relativeMousePosition.y);
if (maintainAspectRatio)
newWidth = newHeight = Mathf.Min(newWidth, newHeight);
m_ResizeTarget.style.width = newWidth;
m_ResizeTarget.style.height = newHeight;
mouseMoveEvent.StopPropagation();
}
void HandleMouseDown(MouseDownEvent mouseDownEvent)
{
// Get the docking settings for the window, as well as the
// layout and mouse position when resize begins.
m_WindowDockingLayout.CalculateDockingCornerAndOffset(m_Container.layout, m_Container.parent.layout);
m_WindowDockingLayout.ApplyPosition(m_Container);
m_ResizeBeginLayout = m_ResizeTarget.layout;
m_ResizeBeginMousePosition = mouseDownEvent.mousePosition;
m_Dragging = true;
this.CaptureMouse();
mouseDownEvent.StopPropagation();
}
void HandleDraggableMouseUp(MouseUpEvent mouseUpEvent)
{
m_Dragging = false;
if (this.HasMouseCapture())
this.ReleaseMouse();
if (OnResizeFinished != null)
OnResizeFinished();
m_WindowDockingLayout.CalculateDockingCornerAndOffset(m_Container.layout, m_Container.parent.layout);
m_WindowDockingLayout.ApplyPosition(m_Container);
}
protected override void ImmediateRepaint()
{
if (m_StyleWidget == null)
{
m_StyleWidget = new GUIStyle("WindowBottomResize") { fixedHeight = 0 };
image = m_StyleWidget.normal.background;
}
if (image == null)
{
Debug.LogWarning("null texture passed to GUI.DrawTexture");
return;
}
GUI.DrawTexture(contentRect, image, ScaleMode.ScaleAndCrop, true, 0, GUI.color, 0, 0);
}
}
}