c# - Write text on an image -

i developing image editor in have implemented rectangle, lines , ellipse drawing functionality using mouse event , using graphics.drawline(), graphics.drawrectangle() , graphics.drawellipse().

i searching writing text on image not find solution, mean whenever click on image @ location cursor change (like writing text in textbox) , can start typing on location.

the graphics.drawstring method similar looking not support dynamic typing

alex fr provided excellent set of drawing tools in drawtools article , these tools serve basis draw tool redux.

i use transparent textbox from: http://www.codeproject.com/articles/4390/alphablendtextbox-a-transparent-translucent-textbo

to add textbox control drawing tools need make class tooltext , drawtext.

in tooltext class, show form "textdialog" without border has textbox:

internal class tooltext : toolobject { public tooltext() {     cursor = new cursor(gettype(), "rectangle.cur"); } public override void onmousedown(drawarea drawarea, mouseeventargs e) {     point p = drawarea.backtrackmouse(new point(e.x, e.y)); textdialog td = new textdialog(); td.location = new point(e.x, e.y + drawarea.top + td.height);     if (td.showdialog() ==     dialogresult.ok)     {     string t = td.thetext;     color c = td.thecolor;     font f = td.thefont;     addnewobject(drawarea, new drawtext(p.x, p.y, t, f, c));     } } 

base drawtext class off drawrectangle couple of properties, text, font, etc , drawing implementation:

public override void draw(graphics g) {     pen pen = new pen(color);     graphicspath gp = new graphicspath();     stringformat format = stringformat.genericdefault;     gp.addstring(_thetext, _font.fontfamily, (int)_font.style, _font.sizeinpoints,                     new pointf(rectangle.x, rectangle.y), format);     // rotate path it's center if necessary     if (rotation != 0)     {         rectanglef pathbounds = gp.getbounds();         matrix m = new matrix();         m.rotateat(rotation, new pointf(pathbounds.left + (pathbounds.width / 2), pathbounds.top + (pathbounds.height / 2)),                     matrixorder.append);         gp.transform(m);     }     g.drawpath(pen, gp);     rectangle.size = g.measurestring(_thetext, _font).tosize();     pen.dispose(); }