C # My little artboard

My artboard.

See the implementation diagram first

Implementation process

Using system;using system.collections.generic;using system.componentmodel;using system.data;using System.Drawing; Using system.drawing.imaging;using system.linq;using system.text;using system.threading.tasks;using    system.windows.forms;//********************** Jin Yan electronic ****************************************namespace huaban{            Public partial class Form1:form {public Form1 () {InitializeComponent ();            toolstrip1.enabled = false;            ForeColor = Color.Black;         BackColor = Color.White;        } Color BackColor = new color (); private void new Toolstripmenuitem_click (object sender, EventArgs e) {Graphics g = this.            CreateGraphics ();            G.clear (BackColor);            Toolstrip1.enabled = true; Create a Bitmap theimage = new Bitmap (this. Clientrectangle.width, this.            Clientrectangle.height);            Editfilename = "New File"; Modify the window caption this. Text = "Mydraw\t" + EditfiLename;            IG = Graphics.fromimage (theimage); Ig.        Clear (BackColor);        } String editfilename = "";        Private Image theimage;        Public Graphics IG {get; private set;} private void Open Toolstripmenuitem_click (object sender, EventArgs e) {Openfiledialog1.multiselect = False            ; if (openfiledialog1.showdialog () = = DialogResult.OK) {//Modify window caption this.                Text = "mydraw\t" + openfiledialog1.filename;                Editfilename = Openfiledialog1.filename;                Theimage = Image.FromFile (openfiledialog1.filename); Graphics g = this.                CreateGraphics (); G.drawimage (Theimage, this.                ClientRectangle);                IG = Graphics.fromimage (theimage); Ig. DrawImage (Theimage, this.                ClientRectangle);            Toolbar can be used with toolstrip1.enabled = true; }} private void Save Toolstripmenuitem_click (objectsender, EventArgs e) {savefiledialog1.filter = "image (*.bmp) |*.bmp";            Savefiledialog1.filename = Editfilename; if (savefiledialog1.showdialog () = = DialogResult.OK) {theimage.save (Savefiledialog1.filename, I                Mageformat.bmp); This.                Text = "mydraw\t" + savefiledialog1.filename;            Editfilename = Savefiledialog1.filename;             }} private void Form1_paint (object sender, PaintEventArgs e) {//To draw images saved in image Graphics g = this.            CreateGraphics ();                if (theimage! = null) {g.clear (color.white); G.drawimage (Theimage, this.            ClientRectangle);        }} Color ForeColor = new color ();                    private void Form1_mousedown (object sender, MouseEventArgs e) {if (E.button = = MouseButtons.Left) {//If you select text input, open the Strinput form if (drawtool = = (int) drawtools.string) {Frm_text InputBox = new Frm_text ();                    Inputbox.startposition = formstartposition.centerparent; if (inputbox.showdialog () = = DialogResult.OK) {Graphics g = this.                        CreateGraphics (); Font Thefont = this.                        Font;                        g.DrawString (InputBox.textBox1.Text, Thefont, New SolidBrush (ForeColor), e.x, e.y); Ig.                    DrawString (InputBox.textBox1.Text, Thefont, New SolidBrush (ForeColor), e.x, e.y);                }}//If you start drawing, start recording mouse position else if ((isdrawing =!isdrawing) = = True)                    {startPoint = new Point (e.x, e.y);                Oldpoint = new Point (e.x, e.y);        }}} int drawtool = 0;    Enum Drawtools {None = 0, Pen = 1, line = 2,         Ellipse = 3, Rectangle = 4, String = 5, Rubber =6} point Oldpo        int = new Point ();        Point startPoint = new Point ();            private void Form1_mousemove (object sender, MouseEventArgs e) {Graphics g; g = this.            CreateGraphics ();                         if (isdrawing) {switch (Drawtool) {case (int) Drawtools.none:                    Break case (int) Drawtools.pen://Draw segment G.drawline from the previous point to the current point (new Pen (ForeColor, 1),                        Oldpoint, New Point (e.x, e.y)); Ig.                        DrawLine (New Pen (ForeColor, 1), Oldpoint, New Point (e.x, e.y));                        Oldpoint.x = e.x;                        Oldpoint.y = e.y;                    Break case (int) Drawtools.line://First restore the image before this operation, and then add line this. Frm_main_paint (This, New PaintEventArgs (this. CreateGraphics (), this.                        ClientRectangle));                        G.drawline (New Pen (ForeColor, 1), StartPoint, New Point (e.x, e.y));                    Break case (int) Drawtools.ellipse://First restore the image before this operation, and then add Ellipse this. Frm_main_paint (this, new PaintEventArgs. CreateGraphics (), this.                        ClientRectangle));                        G.drawellipse (New Pen (ForeColor, 1), Startpoint.x, Startpoint.y, E.x-startpoint.x, E.Y-STARTPOINT.Y);                    Break case (int) Drawtools.rectangle://First restore the image before this operation, and then add Rectangle this. Frm_main_paint (this, new PaintEventArgs. CreateGraphics (), this.                        ClientRectangle));                        G.drawrectangle (New Pen (ForeColor, 1), Startpoint.x, Startpoint.y, E.x-startpoint.x, E.Y-STARTPOINT.Y);                    Break         case (int) drawtools.string:               Break case (int) Drawtools.rubber://Draw wide segment G.drawline with background color (new Pen (BackColor, 20),                        Oldpoint, New Point (e.x, e.y)); Ig.                        DrawLine (New Pen (BackColor), Oldpoint, New Point (e.x, e.y));                        Oldpoint.x = e.x;                        Oldpoint.y = e.y;                Break        }}} bool isdrawing = FALSE;            private void Form1_mouseup (object sender, MouseEventArgs e) {isdrawing = false; Switch (drawtool) {case (int) DrawTools.Line:ig.                    DrawLine (New Pen (ForeColor, 1), StartPoint, New Point (e.x, e.y));                Break case (int) DrawTools.Ellipse:ig.                    DrawEllipse (New Pen (ForeColor, 1), Startpoint.x, Startpoint.y, E.x-startpoint.x, E.Y-STARTPOINT.Y);                Break case (int) DrawtoolS.rectangle:ig.                    DrawRectangle (New Pen (ForeColor, 1), Startpoint.x, Startpoint.y, E.x-startpoint.x, E.Y-STARTPOINT.Y);            Break             }} private void Frm_main_paint (object sender, PaintEventArgs e) {//To draw images saved in image Graphics g = this.            CreateGraphics ();                if (theimage! = null) {g.clear (color.white); G.drawimage (Theimage, this.            ClientRectangle); }} private void Toolstripbutton1_click (object sender, EventArgs e) {Toolstripbutton6.che            cked = false;            toolstripbutton2.checked = false;            toolstripbutton3.checked = false;            toolstripbutton4.checked = false;            toolstripbutton5.checked = false;                if (Drawtool = = (int) drawtools.pen) {drawtool = (int) drawtools.none;            toolstripbutton1.checked = false; } else {drawtool = (int) Drawtools.pen;            Toolstripbutton1.checked = true; }} private void Toolstripbutton2_click (object sender, EventArgs e) {toolStripButton1.            Checked = false;            toolstripbutton6.checked = false;            toolstripbutton3.checked = false;            toolstripbutton4.checked = false;            toolstripbutton5.checked = false;                if (Drawtool = = (int) drawtools.line) {drawtool = (int) drawtools.none;            toolstripbutton2.checked = false;                } else {drawtool = (int) drawtools.line;            Toolstripbutton2.checked = true; }} private void Toolstripbutton3_click (object sender, EventArgs e) {Toolstripbutton1.che            cked = false;            toolstripbutton2.checked = false;            toolstripbutton6.checked = false; toolstripbutton4.checked = false;            toolstripbutton5.checked = false;                if (Drawtool = = (int) drawtools.rectangle) {drawtool = (int) drawtools.none;            toolstripbutton3.checked = false;                } else {drawtool = (int) drawtools.rectangle;            Toolstripbutton3.checked = true; }} private void Toolstripbutton4_click (object sender, EventArgs e) {ToolStrip            button1.checked = false;            toolstripbutton2.checked = false;            toolstripbutton3.checked = false;            toolstripbutton6.checked = false;            toolstripbutton5.checked = false;                if (Drawtool = = (int) drawtools.ellipse) {drawtool = (int) drawtools.none;            toolstripbutton4.checked = false;                } else {drawtool = (int) drawtools.ellipse; Toolstripbutton4.checked = True; }} private void Toolstripbutton5_click (object sender, EventArgs e) {toolstripbutton1.c            hecked = false;            toolstripbutton2.checked = false;            toolstripbutton3.checked = false;            toolstripbutton4.checked = false;            toolstripbutton6.checked = false;                if (Drawtool = = (int) drawtools.string) {drawtool = (int) drawtools.none;            toolstripbutton5.checked = false;                } else {drawtool = (int) drawtools.string;            Toolstripbutton5.checked = true; }} private void Toolstripbutton6_click (object sender, EventArgs e) {toolstripbutton1.c            hecked = false;            toolstripbutton2.checked = false;            toolstripbutton3.checked = false;            toolstripbutton4.checked = false;            toolstripbutton5.checked = false; if (Drawtool = = (int) drawtools.Rubber) {drawtool = (int) drawtools.none;            toolstripbutton6.checked = false;                } else {drawtool = (int) drawtools.rubber;            Toolstripbutton6.checked = true; }} private void color Toolstripmenuitem_click (object sender, EventArgs e) {if (ColorDialog            1.ShowDialog () = = DialogResult.OK) {foreColor = colorDialog1.Color; }                    }    }}

　　

Jin Yan Electronics

C # My little artboard