1835 字
9 分钟
[C#] 一个类实现拖拽调整窗体或控件大小
- 最近闲来无事, 倒是借助WebAPI实现翻译器, 本想设计一个炫酷的界面(模仿VS), 却没想到, 难度大大超出我的想象, 拖拽, 调整大小, 如果要实现VS的边框, 还需要想办法做到过渡透明! 这对于WinForm来说实在是太难了, 如果不过渡透明, 就是全透明, 那鼠标就直接穿窗体了!
- 不过还是有些成果的, 比如, 造了两个轮子
(我真是一个热衷于造轮子的傻子)
-
所说的轮子就是文章标题咯, 因为之前我还做了一个类来实现拖拽移动控件或窗体嘛, 所以我就直接把这个调整大小的跟之前的功能整合到了一起. (可以提到的是, 期间因为特殊需求, 还做了一个映射拖拽移动控件窗体, 就是拖拽控件1, 移动控件2)
-
下面的代码就是程序主体了, 它是应该被封装到一个类库里的, 所以, 不要直接把这些代码添加到你的文件中, 而是新建一个类库(不是新建项目, 而是添加到你的项目中), 然后把这些代码覆盖到新的文件中, 在你的程序中using CHO.DragOperation即可使用代码所包含的3个功能(
DragMove,MapDragMove,DragResize)
using System;using System.Collections.Generic;using System.Drawing;using System.Windows.Forms;
namespace CHO{ namespace DragOperation { public class DragMove { public DragMove(MouseButtons MouseButton, DragMoveMode FollowMode = DragMoveMode.All, bool OutParent = false) { this.MouseButton = MouseButton; this.FollowMode = FollowMode; this.OutParent = OutParent; } public DragMove(DragMoveMode FollowMode = DragMoveMode.All, bool OutParent = false) { AllMouseButton = true; this.FollowMode = FollowMode; this.OutParent = OutParent; }
object AboutControl; // 表示当前移动控件操作是针对哪个控件的 bool Moving = false; // 表示是否正在移动控件 bool AllMouseButton = false; // 表示是否处理所有按钮 bool OutParent; // 表示是否允许脱离父容器的显示区域 Point ControlStartLocation; // 表示移动操作时, 控件的初始位置 Point MouseFirstLocationAboutParent; // 表示移动操作时, 鼠标的初始位置 DragMoveMode FollowMode; // 跟随模式 MouseButtons MouseButton; // 判定按钮 List<Control> AddedControls = new List<Control>(); // 已添加控件
void MouseDownEvent(object sender, MouseEventArgs e) { if ((e.Button == MouseButton) || AllMouseButton) { AboutControl = sender; Moving = true; ControlStartLocation = (sender as Control).Location; if (sender is Form) { MouseFirstLocationAboutParent = Control.MousePosition; } else { MouseFirstLocationAboutParent = (sender as Control).Parent.PointToClient(Control.MousePosition); } } } void MouseMoveEvent(object sender, MouseEventArgs e) { if (sender == AboutControl) { if (Moving) { Point MouseLocationNow; if (sender is Form) { MouseLocationNow = Control.MousePosition; } else { MouseLocationNow = (sender as Control).Parent.PointToClient(Control.MousePosition); } int NewX = MouseLocationNow.X - MouseFirstLocationAboutParent.X + ControlStartLocation.X; int NewY = MouseLocationNow.Y - MouseFirstLocationAboutParent.Y + ControlStartLocation.Y; if (!OutParent) { if (!(sender is Form)) { if (NewX < 0) { NewX = 0; } else if (NewX + (sender as Control).Width > (sender as Control).Parent.Width) { NewX = (sender as Control).Parent.Width - (sender as Control).Width; } if (NewY < 0) { NewY = 0; } else if (NewY + (sender as Control).Height > (sender as Control).Parent.Height) { NewY = (sender as Control).Parent.Height - (sender as Control).Height; } } } if (FollowMode == DragMoveMode.X) { NewY = ControlStartLocation.Y; } if (FollowMode == DragMoveMode.Y) { NewX = ControlStartLocation.X; } (sender as Control).Location = new Point(NewX, NewY); } } else { if (Moving) { Moving = false; (AboutControl as Control).Location = ControlStartLocation; } } } void MouseUpEvent(object sender, MouseEventArgs e) { if (sender != AboutControl) { if (Moving) { (AboutControl as Control).Location = ControlStartLocation; } } Moving = false; } public bool AddControl(Control control) { if (AddedControls.Contains(control)) { return false; } else { control.MouseDown += MouseDownEvent; control.MouseMove += MouseMoveEvent; control.MouseUp += MouseUpEvent; AddedControls.Add(control); return true; } } public bool RemoveControl(Control control) { if (AddedControls.Contains(control)) { control.MouseDown -= MouseDownEvent; control.MouseMove -= MouseMoveEvent; control.MouseUp -= MouseUpEvent; AddedControls.Remove(control); return true; } else { return false; } } }
public class MapDragMove { public MapDragMove(MouseButtons MouseButton, DragMoveMode FollowMode = DragMoveMode.All) { this.MouseButton = MouseButton; this.FollowMode = FollowMode; } public MapDragMove(DragMoveMode FollowMode = DragMoveMode.All) { AllMouseButton = true; this.FollowMode = FollowMode; }
object AboutControl; // 表示当前移动控件操作是针对哪个控件的 bool Moving = false; // 表示是否正在移动控件 bool AllMouseButton = false; // 表示是否处理所有按钮 Point ControlStartLocation; // 表示移动操作时, 控件的初始位置 Point MouseFirstLocation; // 表示移动操作时, 鼠标的初始位置 DragMoveMode FollowMode; // 跟随模式 MouseButtons MouseButton; // 判定按钮 Dictionary<Control, Control> AddedControls = new Dictionary<Control, Control>(); // 已添加控件
void MouseDownEvent(object sender, MouseEventArgs e) { if ((e.Button == MouseButton) || AllMouseButton) { AboutControl = sender; Moving = true; ControlStartLocation = (sender as Control).Location; MouseFirstLocation = Control.MousePosition; } } void MouseMoveEvent(object sender, MouseEventArgs e) { if (sender == AboutControl) { if (Moving) { Point MouseLocationNow = Control.MousePosition;
if (FollowMode == DragMoveMode.X) { AddedControls[sender as Control].Left += MouseLocationNow.X - MouseFirstLocation.X; } else if (FollowMode == DragMoveMode.Y) { AddedControls[sender as Control].Top += MouseLocationNow.Y - MouseFirstLocation.Y; } else { AddedControls[sender as Control].Location = new Point(AddedControls[sender as Control].Location.X + (MouseLocationNow.X - MouseFirstLocation.X), AddedControls[sender as Control].Location.Y + (MouseLocationNow.Y - MouseFirstLocation.Y)); }
MouseFirstLocation = MouseLocationNow; } } else { if (Moving) { Moving = false; (AboutControl as Control).Location = ControlStartLocation; } } } void MouseUpEvent(object sender, MouseEventArgs e) { if (sender != AboutControl) { if (Moving) { (AboutControl as Control).Location = ControlStartLocation; } } Moving = false; } public bool AddControl(Control dragControl, Control moveControl) { if (AddedControls.ContainsKey(dragControl)) { return false; } else { dragControl.MouseDown += MouseDownEvent; dragControl.MouseMove += MouseMoveEvent; dragControl.MouseUp += MouseUpEvent; AddedControls.Add(dragControl, moveControl); return true; } } public bool RemoveControl(Control control) { if (AddedControls.ContainsKey(control)) { control.MouseDown -= MouseDownEvent; control.MouseMove -= MouseMoveEvent; control.MouseUp -= MouseUpEvent; AddedControls.Remove(control); return true; } else { return false; } } }
/// <summary> /// 控件跟随鼠标的移动模式 /// </summary> public enum DragMoveMode { /// <summary> /// 表示只跟随横坐标 /// </summary> X, /// <summary> /// 表示只跟随纵坐标 /// </summary> Y, /// <summary> /// 跟随横坐标与纵坐标 /// </summary> All }
public class DragResize { public DragResize(MouseButtons MouseButton, int BorderSize = 5) { this.MouseButton = MouseButton; this.BorderSize = BorderSize; } public DragResize(int BorderSize = 5) { this.AllMouseButton = true; this.BorderSize = BorderSize; }
int BorderSize = 10; // 边框判断大小 object AboutControl; // 表示当前调整控件操作是针对哪个控件的 bool Resizing = false; // 表示是否正在调整控件 bool AllMouseButton = false; // 表示是否处理所有按钮
bool MouseDownING = false;
bool LeftResize; bool RightResize; bool TopResize; bool BottomResize; private Point MouseFirstLocation; // 表示调整操作时, 鼠标的初始位置 MouseButtons MouseButton; // 判定按钮 List<Control> AddedControls = new List<Control>(); // 已添加控件
void CheckMouse(object sender) { Point mousePosition; if (sender is Form) { mousePosition = Control.MousePosition; } else { mousePosition = (sender as Control).Parent.PointToClient(Control.MousePosition); }
if (mousePosition.X >= (sender as Form).Left && mousePosition.X <= (sender as Form).Left + BorderSize) { LeftResize = true; } else if (mousePosition.X >= (sender as Form).Left + (sender as Form).Width - BorderSize && mousePosition.X <= (sender as Form).Left + (sender as Form).Width) { RightResize = true; } else { LeftResize = false; RightResize = false; } if (mousePosition.Y <= (sender as Form).Top + BorderSize && mousePosition.Y >= (sender as Form).Top) { TopResize = true; } else if (mousePosition.Y >= (sender as Form).Top + (sender as Form).Height - BorderSize && mousePosition.Y <= (sender as Form).Top + (sender as Form).Height) { BottomResize = true; } else { TopResize = false; BottomResize = false; }
if ((LeftResize || RightResize || TopResize || BottomResize) && MouseDownING) { Resizing = true; AboutControl = sender; } else { Resizing = false; } }
void MouseDownEvent(object sender, MouseEventArgs e) { if (AllMouseButton || e.Button == MouseButton) { MouseDownING = true; CheckMouse(sender);
if (Resizing) { MouseFirstLocation = Control.MousePosition; } } } void MouseMoveEvent(object sender, MouseEventArgs e) { if (Resizing && sender == AboutControl) { Point mousePosition = Control.MousePosition; (sender as Control).Invalidate(false); if (LeftResize) { (sender as Control).Width += MouseFirstLocation.X - mousePosition.X; (sender as Control).Left -= MouseFirstLocation.X - mousePosition.X; } else if (RightResize) { (sender as Control).Width += mousePosition.X - MouseFirstLocation.X; } if (TopResize) { (sender as Control).Height += MouseFirstLocation.Y - mousePosition.Y; (sender as Control).Top -= MouseFirstLocation.Y - mousePosition.Y; } else if (BottomResize) { (sender as Control).Height += mousePosition.Y - MouseFirstLocation.Y; } (sender as Control).Invalidate(true); MouseFirstLocation = mousePosition; } else { CheckMouse(sender); if (TopResize) { if (LeftResize) { (sender as Control).Cursor = Cursors.SizeNWSE; } else if (RightResize) { (sender as Control).Cursor = Cursors.SizeNESW; } else { (sender as Control).Cursor = Cursors.SizeNS; } } else if (BottomResize) { if (LeftResize) { (sender as Control).Cursor = Cursors.SizeNESW; } else if (RightResize) { (sender as Control).Cursor = Cursors.SizeNWSE; } else { (sender as Control).Cursor = Cursors.SizeNS; } } else if (LeftResize) { (sender as Control).Cursor = Cursors.SizeWE; } else if (RightResize) { (sender as Control).Cursor = Cursors.SizeWE; } else { (sender as Control).Cursor = Cursors.Default; }
} } void MouseUpEvent(object sender, MouseEventArgs e) { MouseDownING = false; if (Resizing) { Resizing = false; } } void MouseLeaveEvent(object sender, EventArgs e) { (sender as Control).Cursor = Cursors.Default; }
public bool AddControl(Control control) { if (AddedControls.Contains(control)) { return false; } else { control.MouseLeave += MouseLeaveEvent; control.MouseDown += MouseDownEvent; control.MouseMove += MouseMoveEvent; control.MouseUp += MouseUpEvent; AddedControls.Add(control); return true; } } public bool RemoveControl(Control control) { if (AddedControls.Contains(control)) { control.MouseDown -= MouseDownEvent; control.MouseMove -= MouseMoveEvent; control.MouseUp -= MouseUpEvent; AddedControls.Remove(control); return true; } else { return false; } } } }} [C#] 一个类实现拖拽调整窗体或控件大小
https://slimenull.com/posts/20200710031128/