88 lines
3.1 KiB
C#
88 lines
3.1 KiB
C#
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using UnityEngine;
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using UnityEngine.UIElements;
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namespace UnityEditor.U2D.Layout
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{
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internal class VisibilityToolResizer : MouseManipulator
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{
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private Vector2 m_Start;
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private VisualElement m_Root;
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protected bool m_Active;
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private Rect m_StartPos;
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public VisibilityToolResizer()
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{
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activators.Add(new ManipulatorActivationFilter {button = MouseButton.LeftMouse});
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m_Active = false;
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}
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protected override void RegisterCallbacksOnTarget()
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{
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target.RegisterCallback<MouseDownEvent>(OnMouseDown);
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target.RegisterCallback<MouseMoveEvent>(OnMouseMove);
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target.RegisterCallback<MouseUpEvent>(OnMouseUp);
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}
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protected override void UnregisterCallbacksFromTarget()
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{
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target.UnregisterCallback<MouseDownEvent>(OnMouseDown);
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target.UnregisterCallback<MouseMoveEvent>(OnMouseMove);
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target.UnregisterCallback<MouseUpEvent>(OnMouseUp);
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}
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protected void OnMouseDown(MouseDownEvent e)
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{
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if (m_Active)
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{
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e.StopImmediatePropagation();
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return;
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}
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if (CanStartManipulation(e))
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{
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m_Root = target;
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while (m_Root.parent != null)
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m_Root = m_Root.parent;
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m_Start = target.ChangeCoordinatesTo(m_Root, e.localMousePosition);
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m_StartPos = target.parent.layout;
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m_Active = true;
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target.CaptureMouse();
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e.StopPropagation();
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}
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}
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protected void OnMouseMove(MouseMoveEvent e)
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{
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if (m_Active)
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{
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var ce = target.parent;
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Vector2 diff = target.ChangeCoordinatesTo(m_Root, e.localMousePosition) - m_Start;
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var newSize = new Vector2(m_StartPos.width - diff.x, m_StartPos.height - diff.y);
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float minWidth = ce.resolvedStyle.minWidth == StyleKeyword.Auto ? 0 : ce.resolvedStyle.minWidth.value;
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float minHeight = ce.resolvedStyle.minHeight == StyleKeyword.Auto ? 0 : ce.resolvedStyle.minHeight.value;
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float maxWidth = ce.resolvedStyle.maxWidth == StyleKeyword.None ? float.MaxValue : ce.resolvedStyle.maxWidth.value;
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float maxHeight = ce.resolvedStyle.maxHeight == StyleKeyword.None ? float.MaxValue : ce.resolvedStyle.maxHeight.value;
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newSize.x = (newSize.x < minWidth) ? minWidth : ((newSize.x > maxWidth) ? maxWidth : newSize.x);
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newSize.y = (newSize.y < minHeight) ? minHeight : ((newSize.y > maxHeight) ? maxHeight : newSize.y);
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ce.style.width = newSize.x;
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e.StopPropagation();
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}
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}
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protected void OnMouseUp(MouseUpEvent e)
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{
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if (m_Active)
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{
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if (CanStopManipulation(e))
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{
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m_Active = false;
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target.ReleaseMouse();
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e.StopPropagation();
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}
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}
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}
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}
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}
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