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https://github.com/sinai-dev/UnityExplorer.git
synced 2025-06-26 02:02:28 +08:00
refactor
This commit is contained in:
sinaioutlander
363
src/UI/PanelDragger.cs
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363
src/UI/PanelDragger.cs
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@ -0,0 +1,363 @@
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using System;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.UI;
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using UnityExplorer.Input;
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using System.IO;
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#if CPP
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using UnityExplorer.Unstrip.ImageConversion;
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#endif
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namespace UnityExplorer.UI
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{
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// Handles dragging and resizing for the main explorer window.
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public class PanelDragger
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{
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public static PanelDragger Instance { get; private set; }
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public RectTransform Panel { get; set; }
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private static bool s_loadedCursorImage;
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public PanelDragger(RectTransform dragArea, RectTransform panelToDrag)
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{
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Instance = this;
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DragableArea = dragArea;
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Panel = panelToDrag;
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UpdateResizeCache();
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}
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public void Update()
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{
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Vector3 rawMousePos = InputManager.MousePosition;
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ResizeTypes type;
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Vector3 resizePos = Panel.InverseTransformPoint(rawMousePos);
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Vector3 dragPos = DragableArea.InverseTransformPoint(rawMousePos);
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if (WasHoveringResize && m_resizeCursorImage)
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{
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UpdateHoverImagePos();
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}
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// If Mouse pressed this frame
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if (InputManager.GetMouseButtonDown(0))
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{
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if (DragableArea.rect.Contains(dragPos))
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{
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OnBeginDrag();
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return;
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}
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else if (MouseInResizeArea(resizePos))
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{
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type = GetResizeType(resizePos);
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if (type != ResizeTypes.NONE)
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{
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OnBeginResize(type);
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}
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}
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}
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// If mouse still pressed from last frame
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else if (InputManager.GetMouseButton(0))
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{
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if (WasDragging)
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{
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OnDrag();
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}
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else if (WasResizing)
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{
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OnResize();
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}
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}
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// If mouse not pressed
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else
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{
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if (WasDragging)
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{
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OnEndDrag();
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}
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else if (WasResizing)
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{
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OnEndResize();
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}
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else if (MouseInResizeArea(resizePos) && (type = GetResizeType(resizePos)) != ResizeTypes.NONE)
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{
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OnHoverResize(type);
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}
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else if (WasHoveringResize)
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{
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OnHoverResizeEnd();
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}
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}
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return;
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}
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#region DRAGGING
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public RectTransform DragableArea { get; set; }
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public bool WasDragging { get; set; }
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private Vector3 m_lastDragPosition;
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public void OnBeginDrag()
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{
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WasDragging = true;
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m_lastDragPosition = InputManager.MousePosition;
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}
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public void OnDrag()
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{
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Vector3 diff = InputManager.MousePosition - m_lastDragPosition;
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m_lastDragPosition = InputManager.MousePosition;
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Vector3 pos = Panel.localPosition;
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float z = pos.z;
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pos += diff;
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pos.z = z;
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Panel.localPosition = pos;
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}
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public void OnEndDrag()
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{
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WasDragging = false;
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UpdateResizeCache();
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}
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#endregion
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#region RESIZE
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private const int RESIZE_THICKNESS = 10;
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private bool WasResizing { get; set; }
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private ResizeTypes m_currentResizeType = ResizeTypes.NONE;
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private Vector2 m_lastResizePos;
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private bool WasHoveringResize { get; set; }
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private ResizeTypes m_lastResizeHoverType;
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public GameObject m_resizeCursorImage;
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private Rect m_resizeRect;
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private readonly Dictionary<ResizeTypes, Rect> m_resizeMask = new Dictionary<ResizeTypes, Rect>
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{
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{ ResizeTypes.Top, Rect.zero },
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{ ResizeTypes.Left, Rect.zero },
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{ ResizeTypes.Right, Rect.zero },
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{ ResizeTypes.Bottom, Rect.zero },
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};
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[Flags]
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public enum ResizeTypes
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{
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NONE = 0,
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Top = 1,
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Left = 2,
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Right = 4,
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Bottom = 8,
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TopLeft = Top | Left,
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TopRight = Top | Right,
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BottomLeft = Bottom | Left,
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BottomRight = Bottom | Right,
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}
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private void UpdateResizeCache()
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{
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int halfThick = RESIZE_THICKNESS / 2;
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int dblThick = RESIZE_THICKNESS * 2;
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// calculate main outer rect
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// the resize area is both outside and inside the panel,
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// to give a bit of buffer and make it easier to use.
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// outer rect is the outer-most bounds of our resize area
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Rect outer = new Rect(Panel.rect.x - halfThick,
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Panel.rect.y - halfThick,
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Panel.rect.width + dblThick,
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Panel.rect.height + dblThick);
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m_resizeRect = outer;
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// calculate the four cross sections to use as flags
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m_resizeMask[ResizeTypes.Bottom] = new Rect(outer.x, outer.y, outer.width, RESIZE_THICKNESS);
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m_resizeMask[ResizeTypes.Left] = new Rect(outer.x, outer.y, RESIZE_THICKNESS, outer.height);
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m_resizeMask[ResizeTypes.Top] = new Rect(outer.x, outer.y + Panel.rect.height, outer.width, RESIZE_THICKNESS);
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m_resizeMask[ResizeTypes.Right] = new Rect(outer.x + Panel.rect.width, outer.y, RESIZE_THICKNESS, outer.height);
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}
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private bool MouseInResizeArea(Vector2 mousePos)
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{
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return m_resizeRect.Contains(mousePos);
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}
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private ResizeTypes GetResizeType(Vector2 mousePos)
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{
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// Calculate which part of the resize area we're in, if any.
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// We do this via a bitmask with the ResizeTypes enum.
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// We can return Top/Right/Bottom/Left, or a corner like TopLeft.
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int mask = 0;
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if (m_resizeMask[ResizeTypes.Top].Contains(mousePos))
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{
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mask |= (int)ResizeTypes.Top;
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}
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else if (m_resizeMask[ResizeTypes.Bottom].Contains(mousePos))
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{
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mask |= (int)ResizeTypes.Bottom;
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}
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if (m_resizeMask[ResizeTypes.Left].Contains(mousePos))
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{
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mask |= (int)ResizeTypes.Left;
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}
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else if (m_resizeMask[ResizeTypes.Right].Contains(mousePos))
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{
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mask |= (int)ResizeTypes.Right;
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}
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return (ResizeTypes)mask;
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}
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public void OnHoverResize(ResizeTypes resizeType)
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{
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if (WasHoveringResize && m_lastResizeHoverType == resizeType)
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{
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return;
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}
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if (!s_loadedCursorImage)
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LoadCursorImage();
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// we are entering resize, or the resize type has changed.
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WasHoveringResize = true;
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m_lastResizeHoverType = resizeType;
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m_resizeCursorImage.SetActive(true);
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// set the rotation for the resize icon
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float iconRotation = 0f;
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switch (resizeType)
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{
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case ResizeTypes.TopRight:
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case ResizeTypes.BottomLeft:
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iconRotation = 45f; break;
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case ResizeTypes.Top:
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case ResizeTypes.Bottom:
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iconRotation = 90f; break;
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case ResizeTypes.TopLeft:
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case ResizeTypes.BottomRight:
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iconRotation = 135f; break;
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}
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Quaternion rot = m_resizeCursorImage.transform.rotation;
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rot.eulerAngles = new Vector3(0, 0, iconRotation);
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m_resizeCursorImage.transform.rotation = rot;
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UpdateHoverImagePos();
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}
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// update the resize icon position to be above the mouse
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private void UpdateHoverImagePos()
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{
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RectTransform t = UIManager.CanvasRoot.GetComponent<RectTransform>();
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m_resizeCursorImage.transform.localPosition = t.InverseTransformPoint(InputManager.MousePosition);
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}
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public void OnHoverResizeEnd()
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{
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WasHoveringResize = false;
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m_resizeCursorImage.SetActive(false);
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}
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public void OnBeginResize(ResizeTypes resizeType)
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{
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m_currentResizeType = resizeType;
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m_lastResizePos = InputManager.MousePosition;
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WasResizing = true;
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}
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public void OnResize()
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{
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Vector3 mousePos = InputManager.MousePosition;
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Vector2 diff = m_lastResizePos - (Vector2)mousePos;
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m_lastResizePos = mousePos;
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float diffX = (float)((decimal)diff.x / Screen.width);
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float diffY = (float)((decimal)diff.y / Screen.height);
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if (m_currentResizeType.HasFlag(ResizeTypes.Left))
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{
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Vector2 anch = Panel.anchorMin;
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anch.x -= diffX;
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Panel.anchorMin = anch;
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}
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else if (m_currentResizeType.HasFlag(ResizeTypes.Right))
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{
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Vector2 anch = Panel.anchorMax;
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anch.x -= diffX;
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Panel.anchorMax = anch;
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}
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if (m_currentResizeType.HasFlag(ResizeTypes.Top))
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{
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Vector2 anch = Panel.anchorMax;
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anch.y -= diffY;
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Panel.anchorMax = anch;
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}
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else if (m_currentResizeType.HasFlag(ResizeTypes.Bottom))
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{
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Vector2 anch = Panel.anchorMin;
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anch.y -= diffY;
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Panel.anchorMin = anch;
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}
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}
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public void OnEndResize()
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{
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WasResizing = false;
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UpdateResizeCache();
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}
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private void LoadCursorImage()
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{
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try
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{
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string path = @"Mods\Explorer\cursor.png";
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byte[] data = File.ReadAllBytes(path);
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Texture2D tex = new Texture2D(32, 32);
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tex.LoadImage(data, false);
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UnityEngine.Object.DontDestroyOnLoad(tex);
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Sprite sprite = UIManager.CreateSprite(tex, new Rect(0, 0, 32, 32));
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UnityEngine.Object.DontDestroyOnLoad(sprite);
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m_resizeCursorImage = new GameObject("ResizeCursorImage");
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m_resizeCursorImage.transform.SetParent(UIManager.CanvasRoot.transform);
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Image image = m_resizeCursorImage.AddComponent<Image>();
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image.sprite = sprite;
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RectTransform rect = image.transform.GetComponent<RectTransform>();
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rect.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, 32);
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rect.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, 32);
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//m_resizeCursorImage.SetActive(false);
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s_loadedCursorImage = true;
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}
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catch (Exception e)
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{
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ExplorerCore.LogWarning("Exception loading cursor image!\r\n" + e.ToString());
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}
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}
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#endregion
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}
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}
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