[C#] 一个类实现拖拽调整窗体或控件大小
程序员文章站
2022-05-28 09:59:01
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- 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*
(我真是一个热衷于造*的*)
-
所说的*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;
}
}
}
}
}
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