我想在运行时使用鼠标调整大小和移动对象。我正在使用此代码移动和调整控件大小。但是当我将picturebox放入面板时，它会从右边框和底边框丢失其调整大小选项。发生了什么事和任何解决方案？
我从其他论坛得到了这段代码：
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Globalization;
using System.Linq;
using System.Windows.Forms;
namespace ControlManager
{
internal class ControlMoverOrResizer
{
private static bool _moving;
private static Point _cursorStartPoint;
private static bool _moveIsInterNal;
private static bool _resizing;
private static Size _currentControlStartSize;
internal static bool MouseIsInLeftEdge { get; set; }
internal static bool MouseIsInRightEdge { get; set; }
internal static bool MouseIsInTopEdge { get; set; }
internal static bool MouseIsInBottomEdge { get; set; }
internal enum MoveOrResize
{
Move,
Resize,
MoveAndResize
}
internal static MoveOrResize WorkType { get; set; }
internal static void Init(Control control)
{
Init(control, control);
}
internal static void Init(Control control, Control container)
{
_moving = false;
_resizing = false;
_moveIsInterNal = false;
_cursorStartPoint = Point.Empty;
MouseIsInLeftEdge = false;
MouseIsInLeftEdge = false;
MouseIsInRightEdge = false;
MouseIsInTopEdge = false;
MouseIsInBottomEdge = false;
WorkType = MoveOrResize.MoveAndResize;
control.MouseDown += (sender, e) => StartMovingOrResizing(control, e);
control.MouseUp += (sender, e) => StopDragOrResizing(control);
control.MouseMove += (sender, e) => MoveControl(container, e);
}
private static void UpdateMouseEdgeProperties(Control control, Point mouseLocationInControl)
{
if (WorkType == MoveOrResize.Move)
{
return;
}
MouseIsInLeftEdge = Math.Abs(mouseLocationInControl.X) <= 2;
MouseIsInRightEdge = Math.Abs(mouseLocationInControl.X - control.Width) <= 2;
MouseIsInTopEdge = Math.Abs(mouseLocationInControl.Y ) <= 2;
MouseIsInBottomEdge = Math.Abs(mouseLocationInControl.Y - control.Height) <= 2;
}
private static void UpdateMouseCursor(Control control)
{
if (WorkType == MoveOrResize.Move)
{
return;
}
if (MouseIsInLeftEdge )
{
if (MouseIsInTopEdge)
{
control.Cursor = Cursors.SizeNWSE;
}
else if (MouseIsInBottomEdge)
{
control.Cursor = Cursors.SizeNESW;
}
else
{
control.Cursor = Cursors.SizeWE;
}
}
else if (MouseIsInRightEdge)
{
if (MouseIsInTopEdge)
{
control.Cursor = Cursors.SizeNESW;
}
else if (MouseIsInBottomEdge)
{
control.Cursor = Cursors.SizeNWSE;
}
else
{
control.Cursor = Cursors.SizeWE;
}
}
else if (MouseIsInTopEdge || MouseIsInBottomEdge)
{
control.Cursor = Cursors.SizeNS;
}
else
{
control.Cursor = Cursors.Default;
}
}
private static void StartMovingOrResizing(Control control, MouseEventArgs e)
{
if (_moving || _resizing)
{
return;
}
if (WorkType!=MoveOrResize.Move &&
(MouseIsInRightEdge || MouseIsInLeftEdge || MouseIsInTopEdge || MouseIsInBottomEdge))
{
_resizing = true;
_currentControlStartSize = control.Size;
}
else if (WorkType!=MoveOrResize.Resize)
{
_moving = true;
control.Cursor = Cursors.Hand;
}
_cursorStartPoint = new Point(e.X, e.Y);
control.Capture = true;
}
private static void MoveControl(Control control, MouseEventArgs e)
{
if (!_resizing && ! _moving)
{
UpdateMouseEdgeProperties(control, new Point(e.X, e.Y));
UpdateMouseCursor(control);
}
if (_resizing)
{
if (MouseIsInLeftEdge)
{
if (MouseIsInTopEdge)
{
control.Width -= (e.X - _cursorStartPoint.X);
control.Left += (e.X - _cursorStartPoint.X);
control.Height -= (e.Y - _cursorStartPoint.Y);
control.Top += (e.Y - _cursorStartPoint.Y);
}
else if (MouseIsInBottomEdge)
{
control.Width -= (e.X - _cursorStartPoint.X);
control.Left += (e.X - _cursorStartPoint.X);
control.Height = (e.Y - _cursorStartPoint.Y) + _currentControlStartSize.Height;
}
else
{
control.Width -= (e.X - _cursorStartPoint.X);
control.Left += (e.X - _cursorStartPoint.X) ;
}
}
else if (MouseIsInRightEdge)
{
if (MouseIsInTopEdge)
{
control.Width = (e.X - _cursorStartPoint.X) + _currentControlStartSize.Width;
control.Height -= (e.Y - _cursorStartPoint.Y);
control.Top += (e.Y - _cursorStartPoint.Y);
}
else if (MouseIsInBottomEdge)
{
control.Width = (e.X - _cursorStartPoint.X) + _currentControlStartSize.Width;
control.Height = (e.Y - _cursorStartPoint.Y) + _currentControlStartSize.Height;
}
else
{
control.Width = (e.X - _cursorStartPoint.X)+_currentControlStartSize.Width;
}
}
else if (MouseIsInTopEdge)
{
control.Height -= (e.Y - _cursorStartPoint.Y);
control.Top += (e.Y - _cursorStartPoint.Y);
}
else if (MouseIsInBottomEdge)
{
control.Height = (e.Y - _cursorStartPoint.Y) + _currentControlStartSize.Height;
}
else
{
StopDragOrResizing(control);
}
}
else if (_moving)
{
_moveIsInterNal = !_moveIsInterNal;
if (!_moveIsInterNal)
{
int x = (e.X - _cursorStartPoint.X) + control.Left;
int y = (e.Y - _cursorStartPoint.Y) + control.Top;
control.Location = new Point(x, y);
}
}
}
private static void StopDragOrResizing(Control control)
{
_resizing = false;
_moving = false;
control.Capture = false;
UpdateMouseCursor(control);
}
#region Save And Load
private static List<Control> GetAllChildControls(Control control, List<Control> list)
{
List<Control> controls = control.Controls.Cast<Control>().ToList();
list.AddRange(controls);
return controls.SelectMany(ctrl => GetAllChildControls(ctrl, list)).ToList();
}
internal static string GetSizeAndPositionOfControlsToString(Control container)
{
List<Control> controls = new List<Control>();
GetAllChildControls(container, controls);
CultureInfo cultureInfo = new CultureInfo("en");
string info = string.Empty;
foreach (Control control in controls)
{
info += control.Name + ":" + control.Left.ToString(cultureInfo) + "," + control.Top.ToString(cultureInfo) + "," +
control.Width.ToString(cultureInfo) + "," + control.Height.ToString(cultureInfo) + "*";
}
return info;
}
internal static void SetSizeAndPositionOfControlsFromString(Control container, string controlsInfoStr)
{
List<Control> controls = new List<Control>();
GetAllChildControls(container, controls);
string[] controlsInfo = controlsInfoStr.Split(new []{"*"},StringSplitOptions.RemoveEmptyEntries );
Dictionary<string, string> controlsInfoDictionary = new Dictionary<string, string>();
foreach (string controlInfo in controlsInfo)
{
string[] info = controlInfo.Split(new [] { ":" }, StringSplitOptions.RemoveEmptyEntries);
controlsInfoDictionary.Add(info[0], info[1]);
}
foreach (Control control in controls)
{
string propertiesStr;
controlsInfoDictionary.TryGetValue(control.Name, out propertiesStr);
string[] properties = propertiesStr.Split(new [] { "," }, StringSplitOptions.RemoveEmptyEntries);
if (properties.Length == 4)
{
control.Left = int.Parse(properties[0]);
control.Top = int.Parse(properties[1]);
control.Width = int.Parse(properties[2]);
control.Height = int.Parse(properties[3]);
}
}
}
#endregion
}
}
答案 0 :(得分：1)
Init例程中有一个小错误：
internal static void Init(Control control, Control container)
{
_moving = false;
_resizing = false;
_moveIsInterNal = false;
_cursorStartPoint = Point.Empty;
MouseIsInLeftEdge = false;
MouseIsInLeftEdge = false;
MouseIsInRightEdge = false;
MouseIsInTopEdge = false;
MouseIsInBottomEdge = false;
WorkType = MoveOrResize.MoveAndResize;
control.MouseDown += (sender, e) => StartMovingOrResizing(control, e);
control.MouseUp += (sender, e) => StopDragOrResizing(control);
//control.MouseMove += (sender, e) => MoveControl(container, e); // wrong!!
control.MouseMove += (sender, e) => MoveControl(control, e); // right!
}
答案 1 :(得分：1)
您可以将边缘容差值增加到5或更多：
MouseIsInLeftEdge = Math.Abs(mouseLocationInControl.X) <= 5;
MouseIsInRightEdge = Math.Abs(mouseLocationInControl.X - control.Width) <= 5;
MouseIsInTopEdge = Math.Abs(mouseLocationInControl.Y ) <= 5;
MouseIsInBottomEdge = Math.Abs(mouseLocationInControl.Y - control.Height) <= 5;