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SVG Artiste - An SVG Editor

, 3 Aug 2010
A Vector based tool to create and edit SVG images
SVGArtiste2_exe.zip
SVGArtiste2_SampleSVGDrawings.zip
SVGArtiste2_src.zip
SVGLib
SVGLib.csproj.user
SVGLib.ndoc
Crom.Controls
Dock16x16.bmp
Internal
Docking
ControlCollections
Controls
DockButtons
Forms
Engine
Enums
EventArgs
Helpers
SharedHelpers
Properties
Public
Docking
Enums
EventArgs
Helpers
Renderers
TabbedDocument
Controls
Enums
Helpers
Renderers
Base
Draw
Command
Draw.csproj.user
RulerControl
Ruler.bmp
SvgArtiste2
Properties
Settings.settings
Resources
cancel.png
Ellipse.cur
exit.png
exit1.png
Line.cur
new.png
new_page.png
open.png
open1.png
pan.cur
pan_close.cur
Pencil.cur
Rectangle.cur
save.png
save_as.png
save_as1.png
Text.cur
SVGArtiste.csproj.user
Tools
Forms
UserControls
#region Header

/*  --------------------------------------------------------------------------------------------------------------
 *  I Software Innovations
 *  --------------------------------------------------------------------------------------------------------------
 *  SVG Artieste 2.0
 *  --------------------------------------------------------------------------------------------------------------
 *  File     :       ToolPointer.cs
 *  Author   :       ajaysbritto@yahoo.com
 *  Date     :       20/03/2010
 *  --------------------------------------------------------------------------------------------------------------
 *  Change Log
 *  --------------------------------------------------------------------------------------------------------------
 *  Author	Comments
 */

#endregion Header

namespace DrawTools
{
    using System.Collections;
    using System.Drawing;
    using System.Windows.Forms;

    using Draw;

    /// <summary>
    /// Pointer tool
    /// </summary>
    public class ToolPointer : Tool
    {
        #region Fields

        // Keep state about last and current point (used to move and resize objects)
        private PointF _lastPoint = new PointF(0,0);

        // Object which is currently resized:
        private DrawObject _resizedObject;
        private int _resizedObjectHandle;
        private SelectionMode _selectMode = SelectionMode.None;
        private PointF _startPoint = new PointF(0, 0);

        #endregion Fields

        #region Constructors

        public ToolPointer()
        {
            IsComplete = true;
        }

        #endregion Constructors

        #region Enumerations

        private enum SelectionMode
        {
            None,
            NetSelection,   // group selection is active
            Move,           // object(s) are moves
            Size            // object is resized
        }

        #endregion Enumerations

        #region Methods

        /// <summary>
        /// Left mouse button is pressed
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public override void OnMouseDown(DrawArea drawArea, MouseEventArgs e)
        {
            _selectMode = SelectionMode.None;
            PointF point = new Point(e.X, e.Y);

            // Test for resizing (only if control is selected, cursor is on the handle)
            int n = drawArea.GraphicsList.SelectionCount;

                for ( int i = 0; i < n; i++ )
                {
                    DrawObject o = drawArea.GraphicsList.GetSelectedObject(i);
                    int handleNumber = o.HitTest(point);
                    bool hitOnOutline = o.HitOnCircumferance;

                    if ( handleNumber > 0 )
                    {
                        _selectMode = SelectionMode.Size;

                        // keep resized object in class members
                        _resizedObject = o;
                        _resizedObjectHandle = handleNumber;

                        // Since we want to resize only one object, unselect all other objects
                        drawArea.GraphicsList.UnselectAll();
                        o.Selected = true;
                        o.MouseClickOnHandle(handleNumber);

                        break;
                    }

                    if (hitOnOutline && (n == 1)) //only one item is selected
                    {
                        _selectMode = SelectionMode.Size;
                        o.MouseClickOnBorder();
                        o.Selected = true;
                    }

            }

            // Test for move (cursor is on the object)
            if ( _selectMode == SelectionMode.None )
            {
                int n1 = drawArea.GraphicsList.Count;
                DrawObject o = null;

                for ( int i = 0; i < n1; i++ )
                {
                    if ( drawArea.GraphicsList[i].HitTest(point) == 0 )
                    {
                        o = drawArea.GraphicsList[i];
                        break;
                    }
                }

                if ( o != null )
                {
                    _selectMode = SelectionMode.Move;

                    // Unselect all if Ctrl is not pressed and clicked object is not selected yet
                    if ( ( Control.ModifierKeys & Keys.Control ) == 0  && !o.Selected )
                        drawArea.GraphicsList.UnselectAll();

                    // Select clicked object
                    o.Selected = true;

                    drawArea.Cursor = Cursors.SizeAll;
                }
            }

            // Net selection
            if ( _selectMode == SelectionMode.None )
            {
                // click on background
                if ( ( Control.ModifierKeys & Keys.Control ) == 0 )
                    drawArea.GraphicsList.UnselectAll();

                _selectMode = SelectionMode.NetSelection;
                drawArea.DrawNetRectangle = true;
            }

            _lastPoint.X = e.X;
            _lastPoint.Y = e.Y;
            _startPoint.X = e.X;
            _startPoint.Y = e.Y;

            drawArea.Capture = true;
            drawArea.NetRectangle = DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint);

            drawArea.Refresh();
        }

        /// <summary>
        /// Mouse is moved.
        /// None button is pressed, ot left button is pressed.
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public override void OnMouseMove(DrawArea drawArea, MouseEventArgs e)
        {
            var point = new Point(e.X, e.Y);

            // set cursor when mouse button is not pressed
            if ( e.Button == MouseButtons.None )
            {
                Cursor cursor = null;

                for ( int i = 0; i < drawArea.GraphicsList.Count; i++ )
                {
                    int n = drawArea.GraphicsList[i].HitTest(point);

                    if ( n > 0 )
                    {
                        cursor = drawArea.GraphicsList[i].GetHandleCursor(n);
                        break;
                    }
                    if (drawArea.GraphicsList[i].HitOnCircumferance)
                    {
                        cursor = drawArea.GraphicsList[i].GetOutlineCursor(n);
                        break;
                    }
                }

                if ( cursor == null )
                    cursor = Cursors.Default;

                drawArea.Cursor = cursor;

                return;
            }

            if ( e.Button != MouseButtons.Left )
                return;

            // Left button is pressed

            // Find difference between previous and current position
            float dx = e.X - _lastPoint.X;
            float dy = e.Y - _lastPoint.Y;

            _lastPoint.X = e.X;
            _lastPoint.Y = e.Y;

            // resize
            if ( _selectMode == SelectionMode.Size )
            {
                if ( _resizedObject != null )
                {
                    _resizedObject.MoveHandleTo(point, _resizedObjectHandle);
                    drawArea.SetDirty();
                    drawArea.Refresh();
                }
            }

            // move
            if ( _selectMode == SelectionMode.Move )
            {
                int n = drawArea.GraphicsList.SelectionCount;

                for ( int i = 0; i < n; i++ )
                {
                    drawArea.GraphicsList.GetSelectedObject(i).Move(dx, dy);
                }

                drawArea.Cursor = Cursors.SizeAll;
                drawArea.SetDirty();
                drawArea.Refresh();
            }

            if ( _selectMode == SelectionMode.NetSelection )
            {
                drawArea.NetRectangle = DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint);
                drawArea.Refresh();
                return;
            }
        }

        /// <summary>
        /// Right mouse button is released
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public override void OnMouseUp(DrawArea drawArea, MouseEventArgs e)
        {
            if ( _selectMode == SelectionMode.NetSelection )
            {
                // Group selection
                drawArea.GraphicsList.SelectInRectangle(drawArea.NetRectangle);

                _selectMode = SelectionMode.None;
                drawArea.DrawNetRectangle = false;
            }

            if ( _resizedObject != null )
            {
                // after resizing
                _resizedObject.Normalize();
                _resizedObject = null;
                drawArea.ResizeCommand(drawArea.GraphicsList.GetFirstSelected(),
                    new PointF(_startPoint.X, _startPoint.Y),
                    new PointF(e.X, e.Y),
                    _resizedObjectHandle);
            }

            drawArea.Capture = false;
            drawArea.Refresh();

            //push the command to undo/Redo list now
            if (_selectMode == SelectionMode.Move)
            {
                var movedItemsList = new ArrayList();

                for (int i = 0; i < drawArea.GraphicsList.SelectionCount; i++)
                {
                    movedItemsList.Add(drawArea.GraphicsList.GetSelectedObject(i));
                }

                var delta = new PointF {X = e.X - _startPoint.X, Y = e.Y - _startPoint.Y};
                drawArea.MoveCommand(movedItemsList, delta);
            }

            IsComplete = true;
        }

        #endregion Methods
    }
}

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

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About the Author

Ajay Britto
Engineer
Singapore Singapore
He is a Microsoft technology enthusiast, who wish to create applications which others find useful.He loves making small tools and getting involved in architecting bigger systems.

He is currently working as a professional developer in a software development firm in .Net technologies.
 
He likes reading technical blogs, contributing to opensource and most importantly, enjoying life.
 
His ambition is to be an impressive software maker.

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