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Simple SVG Editor

By , 18 Sep 2007
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Introduction

SvgPaint is the simplest SVG editor. This application is a combination of two projects from The Code Project: DrawTools by Alex Fry and SVGPad by Maurizio Bigoloni. This application implements only trivial graphics elements from SVG format, no rendering, no transforming, etc.

Sample screenshot

How It Works

Sample screenshot

SvgLib reads and parses the Svg file and creates object SvgDoc with SvgElements.

Then, from SvgElements, create the DrawObjects, objects by DrawObject library.

After editing using the DrawTools library, the graphics objects may be saved in the edited Svg file.

I do not use serialization because it is used in the DrawTools project. I added to DrawObjects static methods that create an XML string with graphic elements in Svg format.

I also added a few graphics classes into used projects:

  • SvgPolyline into SvgPad
  • DrawText, DrawImage into DrawTools

Moreover, I added scaling capability and filling.

How to Transform Svg Elements to Draw Objects

After created SvgDoc, calling recursing method AddFromSvg() (beginning from root element), that, for all Svg elements, calls static method CreateDrawObject() of the DrawObject class:

public void AddFromSvg(SvgElement ele) 
{ 
	while (ele != null) 
	{ 
		DrawObject o = this.CreateDrawObject(ele); 
		if (o != null) 
			Add(o); 
		SvgElement child = ele.getChild(); 
		while (child != null) 
		{ 
			AddFromSvg(child); 
			child = child.getNext(); 
		} 
		ele = ele.getNext(); 
	} 
} 

The method CreateDrawObject() of basic class DrawObject has input parameter SvgElement and calls static method Create() of inherited draw objects that create themselves.

Then, the new draw objects add to GraphicsList object:

DrawObject CreateDrawObject(SvgElement svge) 
{ 
	DrawObject o = null; 
	switch (svge.getElementType()) 
	{ 
		case SvgElement._SvgElementType.typeLine: 
			o = DrawLine.Create((SvgLine )svge); 
			break; 
		case SvgElement._SvgElementType.typeRect: 
			o = DrawRectangle.Create((SvgRect )svge); 
			break; 
		case SvgElement._SvgElementType.typeEllipse: 
			o = DrawEllipse.Create((SvgEllipse )svge); 
			break; 
		case SvgElement._SvgElementType.typePolyline: 
			o = DrawPolygon.Create((SvgPolyline )svge); 
			break; 
		case SvgElement._SvgElementType.typeImage: 
			o = DrawImage.Create((SvgImage )svge); 
			break; 
		case SvgElement._SvgElementType.typeText: 
			o = DrawText.Create((SvgText )svge); 
			break; 
		case SvgElement._SvgElementType.typeGroup: 
			o = CreateGroup((SvgGroup )svge); 
			break; 
		default: 
		break; 
	} 
	return o; 
} 

Graphics Classes

Sample screenshot

For more details, see DrawTools and SVGPad projects on The Code Project site.

I thank Alex Fry and Maurizio Bigoloni for these interesting projects.

History

  • 18th September, 2007: I added print/preview and exported into JPG, GIF, PNG formats
  • 16th November, 2006: Initial version 

Contact Details

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Shokhin
Web Developer
Russian Federation Russian Federation
No Biography provided

Comments and Discussions

 
BugBugs found PinmemberFei Hap Lee8-Apr-14 16:45 
QuestionAlgorithm PinmemberAshwini615-Dec-12 0:52 
GeneralMy vote of 5 Pinmembermanoj kumar choubey20-Feb-12 19:27 
GeneralGood work PinmemberFco. Javier Marin17-Oct-08 5:47 
GeneralNode and Edges Problem Pinmemberkrish_knight32618-Sep-07 22:47 
GeneralRe: Node and Edges Problem PinmemberShokhin20-Sep-07 23:43 
General[Message Removed] Pinmembernompel1-Oct-08 7:32 
GeneralIn the demo,missed the namespace Pinmembersun37855475927-Aug-07 2:45 
GeneralRe: In the demo,missed the namespace PinmemberShokhin4-Sep-07 18:24 
QuestionI what to Add more shapes? what i have to do Pinmemberkrish_knight32629-Jul-07 23:03 
AnswerRe: I what to Add more shapes? what i have to do PinmemberShokhin4-Sep-07 18:29 
GeneralForm1.cs(design) is not displaying in .net window Pinmembersendnewsletters2-May-07 0:28 
GeneralRe: Form1.cs(design) is not displaying in .net window PinmemberShokhin5-May-07 19:35 
GeneralThanks for the subject Pinmemberdomanz11127-Mar-07 6:44 
GeneralThanks for posting PinmemberDougKreutzer7-Mar-07 11:36 
QuestionScreenShots missing PinmemberAndrew Novik29-Nov-06 19:33 
AnswerRe: ScreenShots missing PinmemberShokhin29-Nov-06 21:30 
GeneralSource code missing PinmemberTony Bermudez29-Nov-06 16:29 
GeneralRe: Source code missing PinmemberShokhin29-Nov-06 22:00 
GeneralRe: Source code missing PinmemberShokhin29-Nov-06 22:03 

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