Use C # To implement the screen color absorption function, with a logic mind diagram. The function code can be implemented in less than 50 lines.

 

This program was written when I went to school. It happened several years ago. When I sorted out hard drive files a few days ago, I found that I actually wrote a lot of things, but I didn't mix them in the garden at the time, so there is no way to share it. If you have time, share it with your friends. My main implementation ideas are:

1. Create a canvas (that is, Form) with the same size as the current screen.

2. Create a drawing object on the canvas and copy the content of the current screen.

3. Use the GetThumbnailImage method of the Image object to obtain a 20-pixel Image of the mouse coordinate point, and then zoom in the Image as a thumbnail to achieve the magnifier effect.

4. Use the API to obtain the pixel color of the current mouse coordinate point

V. Real-time tracking of the color-absorbing Display Information Form

6. the arrow key fine-tuning function allows you to directly call WIN's API to set mouse coordinates.

 

Let's take a look at the attraction effect:

Control layout:

Logic Thinking diagram of real-time tracking form display mode:

The form is always in the shown state (top left, top right, bottom left, and bottom right). The implementation code is as follows:

Point p = new Point ();

P. X = MousePosition. X + 10;

P. Y = MousePosition. Y + 10;

 

Size s = Screen. PrimaryScreen. Bounds. Size;

 

If (p. X> s. Width-this. Width)

P. X-= this. Width + 20;

If (p. Y> s. Height-this. Height)

P. Y-= this. Height + 20;

 

This. Location = p;

 

 

Now, I will attach all my code below:

 

Using System;

Using System. Collections. Generic;

Using System. ComponentModel;

Using System. Data;

Using System. Drawing;

Using System. Text;

Using System. Windows. Forms;

 

Namespace LR. Tools

{

/// <Summary>

/// Summary of LR. Tools

/// Program: LR. Tools V1.0

/// Developer: werewolf

// QQ: 459094521 blog: http://www.cnblogs.com/waw/

/// Compilation Time:

/// <Summary>

 

Public partial class WinEatColor: LR. Tools. MasterForm

{

Form f = new Form ();

Public WinEatColor ()

{

F. FormBorderStyle = FormBorderStyle. None; // no border

F. Cursor = System. Windows. Forms. Cursors. Cross;

F. WindowState = FormWindowState. Maximized;

F. Opacity = 0.01;

F. ShowInTaskbar = false;

F. Show ();

 

InitializeComponent ();

}

 

Private void timereffectick (object sender, EventArgs e)

{

// Coordinates of the mouse

This. label1.Text = "mouse coordinates:" + MousePosition. X + "," + MousePosition. Y;

// Display handle

This. label3.Text = "handle:" + LR. Win32API. WindowAPI. WindowFromPoint (MousePosition );

// The current form automatically follows the mouse

This. MoveForm ();

// Use the API to obtain the pixel color of the current mouse coordinate point

Color c = LR. Win32API. WindowAPI. GetColorOfScreen (MousePosition );

// Code displayed on the webpage

This. textBox1.Text = "#" + c. Name. ToUpper (). Substring (2 );

// Display RGB three colors

This.txt _ RGB. Text = c. R. ToString () + "," + c. G. ToString () + "," + c. B. ToString ();

// Set the label color

This. label6.BackColor = c;

// Display magnifiers

This. ShowPictureBox (MousePosition );

}

 

Void ShowPictureBox (Point p)

{

// Create a canvas with the same size as the current screen

Bitmap bmp = new Bitmap (20, 20 );

// Create a drawing object on the canvas

Graphics g = Graphics. FromImage (bmp );

// Capture and copy the current Screen Content

G. CopyFromScreen (p. X-10, p. Y-10, bmp. Size );

// Magnifiers in the form of thumbnails

Image pThumbnail = bmp. GetThumbnailImage (this. pictureBox1.Width, this. pictureBox1.Height, null, new IntPtr ());

// Enlarge the image

G. DrawImage (bmp, 10, 10, pThumbnail. Width, pThumbnail. Height );

G. Dispose ();

 

This. pictureBox1.Image = pThumbnail;

G = Graphics. FromImage (this. pictureBox1.Image );

G. DrawRectangle (Pens. Black, this. pictureBox1.Width/2-5, this. pictureBox1.Height/2-5, 10, 10 );

G. Dispose ();

}

 

Void MoveForm ()

{

Point p = new Point ();

P. X = MousePosition. X + 10;

P. Y = MousePosition. Y + 10;

 

Size s = Screen. PrimaryScreen. Bounds. Size;

 

If (p. X> s. Width-this. Width)

P. X-= this. Width + 20;

If (p. Y> s. Height-this. Height)

P. Y-= this. Height + 20;

 

This. Location = p;

}

 

Private void WinEatColor_Load (object sender, EventArgs e)

{

}

 

Private void WinEatColor_KeyUp (object sender, KeyEventArgs e)

{

If (e. KeyCode = Keys. Escape)

This. timer1.Stop ();

 

Point pCur = MousePosition;

// Fine-tune the direction keys

If (e. KeyCode = Keys. Up)

LR. Win32API. WindowAPI. SetCursorPos (pCur. X, pCur. Y-1 );

If (e. KeyCode = Keys. Left)

LR. Win32API. WindowAPI. SetCursorPos (pCur. X-1, pCur. Y );

If (e. KeyCode = Keys. Right)

LR. Win32API. WindowAPI. SetCursorPos (pCur. X + 1, pCur. Y );

If (e. KeyCode = Keys. Down)

LR. Win32API. WindowAPI. SetCursorPos (pCur. X, pCur. Y + 1 );

}

 

Private void WinEatColor_Deactivate (object sender, EventArgs e)

{

This. timer1.Stop ();

}

 

// Refresh

Private void button#click (object sender, EventArgs e)

{

This. timer1.Start ();

}

 

Private void textbox#mouseenter (object sender, EventArgs e)

{

This. textBox1.Focus ();

This. textBox1.SelectAll ();

This. textBox1.Copy ();

}

 

Private void picturebox#mousedown (object sender, MouseEventArgs e)

{

LR. Win32API. WindowAPI. MouseMoveWindow (this. Handle );

}

 

Private void WinEatColor_FormClosed (object sender, FormClosedEventArgs e)

{

F. Close ();

}

}

}

From: Ai Wei from blog