C # Software Development example. Private Custom screenshot Tool (vii) Add Magnifier function

Previous: C # software development examples. Customize your own on-screen tools (vi) Add configuration management features

Because it may be necessary to accurately intercept a certain part, so the function of the magnifying glass, so that when the interception is easier to locate the location.

Add the Picturebox,name property to "Picturebox_zoom";

Add the following code to the "Form1_Load" event handler:

Sets the size of the Magnifier            this.picturebox_zoom. Width = this. Zoomboxwidth;            This.picturebox_zoom. Height = this. Zoomboxheight;

Add code to the "Exitcutimage" method:

Add code to the "Form1_mouseup" event handler function:

Add the code at the end of the else condition of the "ShowForm" method:

if (this. zoomboxvisible)                {                    Updatecutinfolabel (updateuimode.showzoombox);                    This.picturebox_zoom. Show ();                }

Add the following code at the end of the "Updatecutinfolabel" function:

if (this.picturebox_zoom. Visible | | (Updateuimode & updateuimode.showzoombox)! = Updateuimode.none) {Point zoomlocation = new P                Oint (mouseposition.x + MOUSEPOSITION.Y + 22); if (ZOOMLOCATION.Y + this.picturebox_zoom. Height > this. Height) {if (zoomlocation.x + this.picturebox_zoom. Width > this. Width) {zoomlocation = new Point (mouseposition.x-this.picturebox_zoom. Width-10, Mouseposition.y-this.picturebox_zoom.                    HEIGHT-10); } else {zoomlocation = new Point (mouseposition.x + Mouse Position.y-this.picturebox_zoom.                    HEIGHT-15); }} else {if (zoomlocation.x + this.picturebox_zoom. Width > this. Width) {zoomlocation = new Point (mouseposition.x-tHis.picturebox_zoom.                    Width-15, MOUSEPOSITION.Y); }} this.picturebox_zoom.                location = Zoomlocation; if (!this.picturebox_zoom. Visible) {This.picturebox_zoom.                Show (); }            }

Add the following code to the "Form1_keyup" event handler:

Add the "Paint" event handler for "Picturebox_zoom", such as the following code:

        <summary>///Magnifier component Redraw event handlers///real-time display of enlarged image of mouse pointer////</summary>//&L T;param name= "Sender" ></param>//<param name= "E" ></param> private void Picturebox_zoo M_paint (object sender, PaintEventArgs e) {Bitmap bmp_lbl = new Bitmap (E.cliprectangle.width, E.cliprect Angle.            Height); int srcwidth = (int) (this.)            ZOOMBOXWIDTH/10); int srcheight = (int) (this.)            ZOOMBOXHEIGHT/10);            Bitmap bmp = New Bitmap (srcwidth, srcheight);            Rectangle srcrect = new Rectangle (mouseposition.x-5, mouseposition.y-4, Srcwidth, srcheight); if (!iscuting) {srcrect = new Rectangle (mouseposition.x-6, mouseposition.y-5, Srcwidth, SRC            Height);            } Graphics g = Graphics.fromimage (BMP);            G.drawimage (screenimage, 0, 0, srcrect, graphicsunit.pixel);            G.dispose (); Zoom int x, y; for (int row = 0; row < BMP. Height; row++) {for (int col = 0; col < bmp. Width; col++) {Color pc = BMP.                    GetPixel (col, Row);                        for (int h = 0, H < h++) {for (int w = 0; w < w++)                            {x = col * + W;                            y = row * + H; if (x < BMP_LBL. Width && y < bmp_lbl. Height) {Bmp_lbl.                            SetPixel (x, y, PC); }}}}} e.graphics.drawimage (Bmp_lbl, 0,            0);            int Blockx = E.CLIPRECTANGLE.WIDTH/2;            int blocky = E.CLIPRECTANGLE.HEIGHT/2;            SolidBrush brush = new SolidBrush (Color.FromArgb (10, 124, 202));       Pen pen = new Pen (brush, 2.0F);     E.graphics.drawline (pen, New Point (0, blocky), New Point (E.cliprectangle.width, blocky));            E.graphics.drawline (pen, New Point (Blockx, 0), New Point (Blockx, e.cliprectangle.height));            G.dispose (); Bmp_lbl.        Dispose (); }

Compile, execute, see the effect!

Next:C # Software development examples. Customize your own on-screen tools (eight) Add keyboard operation function

C # Software Development example. Private custom-made screen tools (vii) Adding Magnifier