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這是代碼：如何在鼠標光標的當前位置顯示新窗體？
private void hsMagnfier_OnMouseDown(object sender)
{
int x = mLastCursorPosition.X;
int y = mLastCursorPosition.Y;
MagnifierForm magnifier = new MagnifierForm(mConfiguration, System.Windows.Forms.Cursor.Position);//mLastCursorPosition);
magnifier.Show();
}
上面這個代碼是在Form我可以拖過屏幕。
然後，當我點擊一個圖標時，它正在做magnifier.Show();，放大鏡形式顯示在鼠標當前位置所在的位置。
但是，如果我再次點擊它，所以現在新形式放大鏡的位置在我的Form1中心。而不是在第一次鼠標當前的位置。
這是MagnifierForm代碼可能是第一次在當前鼠標位置，但在下一次/ s它在Form1的中心？
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
using System.IO;
using System.Drawing.Imaging;
namespace ScreenVideoRecorder
{
public partial class MagnifierForm : Form
{
public MagnifierForm(Configuration configuration, Point startPoint)
{
InitializeComponent();
//--- My Init ---
mConfiguration = configuration;
FormBorderStyle = FormBorderStyle.None;
ShowInTaskbar = mConfiguration.ShowInTaskbar;
TopMost = mConfiguration.TopMostWindow;
Width = mConfiguration.MagnifierWidth;
Height = mConfiguration.MagnifierHeight;
// Make the window (the form) circular
GraphicsPath gp = new GraphicsPath();
gp.AddEllipse(ClientRectangle);
Region = new Region(gp);
mImageMagnifier = Properties.Resources.magnifierGlass;
mTimer = new Timer();
mTimer.Enabled = true;
mTimer.Interval = 20;
mTimer.Tick += new EventHandler(HandleTimer);
mScreenImage = new Bitmap(Screen.PrimaryScreen.Bounds.Width,
Screen.PrimaryScreen.Bounds.Height);
mStartPoint = startPoint;
mTargetPoint = startPoint;
if (mConfiguration.ShowInTaskbar)
ShowInTaskbar = true;
else
ShowInTaskbar = false;
}
protected override void OnShown(EventArgs e)
{
RepositionAndShow();
}
private delegate void RepositionAndShowDelegate();
private void RepositionAndShow()
{
if (InvokeRequired)
{
Invoke(new RepositionAndShowDelegate(RepositionAndShow));
}
else
{
// Capture the screen image now!
Graphics g = Graphics.FromImage(mScreenImage);
g.CopyFromScreen(0, 0, 0, 0, new Size(mScreenImage.Width, mScreenImage.Height));
g.Dispose();
if (mConfiguration.HideMouseCursor)
Cursor.Hide();
else
Cursor = Cursors.Cross;
Capture = true;
if (mConfiguration.RememberLastPoint)
{
mCurrentPoint = mLastMagnifierPosition;
Cursor.Position = mLastMagnifierPosition;
Left = (int)mCurrentPoint.X - Width/2;
Top = (int)mCurrentPoint.Y - Height/2;
}
else
{
mCurrentPoint = Cursor.Position;
}
Show();
}
}
void HandleTimer(object sender, EventArgs e)
{
float dx = mConfiguration.SpeedFactor * (mTargetPoint.X - mCurrentPoint.X);
float dy = mConfiguration.SpeedFactor * (mTargetPoint.Y - mCurrentPoint.Y);
if (mFirstTime)
{
mFirstTime = false;
mCurrentPoint.X = mTargetPoint.X;
mCurrentPoint.Y = mTargetPoint.Y;
Left = (int)mCurrentPoint.X - Width/2;
Top = (int)mCurrentPoint.Y - Height/2;
return;
}
mCurrentPoint.X += dx;
mCurrentPoint.Y += dy;
if (Math.Abs(dx) < 1 && Math.Abs(dy) < 1)
{
mTimer.Enabled = false;
}
else
{
// Update location
Left = (int)mCurrentPoint.X - Width/2;
Top = (int)mCurrentPoint.Y - Height/2;
mLastMagnifierPosition = new Point((int)mCurrentPoint.X, (int)mCurrentPoint.Y);
}
Refresh();
}
protected override void OnMouseDown(MouseEventArgs e)
{
mOffset = new Point(Width/2 - e.X, Height/2 - e.Y);
mCurrentPoint = PointToScreen(new Point(e.X + mOffset.X, e.Y + mOffset.Y));
mTargetPoint = mCurrentPoint;
mTimer.Enabled = true;
}
protected override void OnMouseUp(MouseEventArgs e)
{
if (mConfiguration.CloseOnMouseUp)
{
Close();
mScreenImage.Dispose();
}
Cursor.Show();
Cursor.Position = mStartPoint;
}
protected override void OnMouseMove(MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
mTargetPoint = PointToScreen(new Point(e.X + mOffset.X, e.Y + mOffset.Y));
mTimer.Enabled = true;
}
}
protected override void OnPaintBackground(PaintEventArgs e)
{
if (mConfiguration.DoubleBuffered)
{
// Do not paint background (required for double buffering)!
}
else
{
base.OnPaintBackground(e);
}
}
protected override void OnPaint(PaintEventArgs e)
{
if (mBufferImage == null)
{
mBufferImage = new Bitmap(Width, Height);
}
Graphics bufferGrf = Graphics.FromImage(mBufferImage);
Graphics g;
if (mConfiguration.DoubleBuffered)
{
g = bufferGrf;
}
else
{
g = e.Graphics;
}
if (mScreenImage != null)
{
Rectangle dest = new Rectangle(0, 0, Width, Height);
int w = (int)(Width/mConfiguration.ZoomFactor);
int h = (int)(Height/mConfiguration.ZoomFactor);
int x = Left - w/2 + Width/2;
int y = Top - h/2 + Height/2;
g.DrawImage(
mScreenImage,
dest,
x, y,
w, h,
GraphicsUnit.Pixel);
}
if (mImageMagnifier != null)
{
g.DrawImage(mImageMagnifier, 0, 0, Width, Height);
}
if (mConfiguration.DoubleBuffered)
{
e.Graphics.DrawImage(mBufferImage, 0, 0, Width, Height);
}
}
//--- Data Members ---
#region Data Members
private Timer mTimer;
private Configuration mConfiguration;
private Image mImageMagnifier;
private Image mBufferImage = null;
private Image mScreenImage = null;
private Point mStartPoint;
private PointF mTargetPoint;
private PointF mCurrentPoint;
private Point mOffset;
private bool mFirstTime = true;
private static Point mLastMagnifierPosition = Cursor.Position;
#endregion
}
}
新窗體放大鏡第一次出現在我的鼠標光標處。 下一次我點擊它顯示Form1中心的放大鏡窗體，而不是鼠標光標的位置。
這是爲什麼？當我再次在圖標上點擊它時，它仍在做
System.Windows.Forms.Cursor.Position
再次。奇怪。
經過再次第一時間內它顯示在鼠標cursour但下一次的當前位置的放大鏡形式/ s的它顯示的位置，新的放大鏡形式放大鏡的形式是最後一次。如果我在屏幕上移動放大鏡的形狀，並在下一次將它放在某處，我將再次顯示放大鏡，它將放在最後放置的位置，而不是放在鼠標光標所在的位置。我再次檢查每次我點擊以顯示它正在做System.Windows.Forms.Cursor.Position的放大鏡形式，但顯示它在最後的地方，而不是鼠標cursour是。 –
有些東西可以防止放大鏡窗體顯示鼠標光標所在的位置，並使其顯示放大鏡上一次放置的位置。有些東西需要重新設置，可能是配置中的東西。 –