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(HandleResizeFromTop); break; } case ResizeHandleAnchor.TopRight: { AddToClassList("diagonal"); AddToClassList("top-right"); RegisterCallback(HandleResizeFromTopRight); break; } case ResizeHandleAnchor.Right: { AddToClassList("horizontal"); AddToClassList("right"); RegisterCallback(HandleResizeFromRight); break; } case ResizeHandleAnchor.BottomRight: { AddToClassList("diagonal"); AddToClassList("bottom-right"); RegisterCallback(HandleResizeFromBottomRight); break; } case ResizeHandleAnchor.Bottom: { AddToClassList("vertical"); AddToClassList("bottom"); RegisterCallback(HandleResizeFromBottom); break; } case ResizeHandleAnchor.BottomLeft: { AddToClassList("diagonal"); AddToClassList("bottom-left"); RegisterCallback(HandleResizeFromBottomLeft); break; } case ResizeHandleAnchor.Left: { AddToClassList("horizontal"); AddToClassList("left"); RegisterCallback(HandleResizeFromLeft); break; } case ResizeHandleAnchor.TopLeft: { AddToClassList("diagonal"); AddToClassList("top-left"); RegisterCallback(HandleResizeFromTopLeft); break; } } RegisterCallback(HandleMouseDown); RegisterCallback(HandleDraggableMouseUp); m_ResizeTarget.RegisterCallback(InitialLayoutSetup); } void InitialLayoutSetup(GeometryChangedEvent evt) { m_ResizeTarget.UnregisterCallback(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); } } }