how can move shape i have drawn in form

Question

i am doing something like the sample code in the http://www.c-harpcorner.com/1/pbrush.asp the PaintBrush in C# example.but now i want to move the shape that i have drawn in the form to reposition it.how can i do so and how can i know which shape my mouse is clicking.that mean when the mouse is on top of the shape, the shape will change colour bt the mouse move away th colour change back to original.thank you for your reply

Administrator · Answer

The LinkedList calss simply provideds a means to store and retrieve shapes that have been drawn. Abit of a waste - you can use an ArrayList out of the box to get the same service. Bill F

Administrator · Answer

i not realli understand the code in the linked list in this program http://www.c-harpcorner.com/1/pbrush.asp can you tell me wat is this code is about? using System; using System.Runtime.Serialization; namespace workflowTool { /// /// Summary description for LinkedList. /// public class LinkedList { internal class Node { internal object m_ObjectToStore; internal Node m_Next; internal Node m_Previous; public Node(object objectToStore) { m_ObjectToStore = objectToStore; } } Node m_First; internal uint m_uiNumOfObjects; // These members are used to optimize enumeration. Another way could have been to // iterate till required node is found (which is costly). internal long m_lLastAccessed; internal Node m_LastAccessed; public LinkedList() { // // TODO: Add constructor logic here // m_First = null; m_uiNumOfObjects = 0; m_lLastAccessed = -1; } public void AddToEnd(object objToAdd) { if (m_First == null) { m_First = new Node(objToAdd); m_First.m_Next = m_First; m_First.m_Previous = m_First; ++m_uiNumOfObjects; return; } Node newNode = new Node(objToAdd); // Get the previous node. Node last = m_First.m_Previous; newNode.m_Next = last.m_Next; newNode.m_Previous = last.m_Previous; last.m_Next = newNode; m_First.m_Previous = newNode; ++m_uiNumOfObjects; } public void Clear() { m_First = null; m_uiNumOfObjects = 0; m_lLastAccessed = -1; } public uint Count { get { return m_uiNumOfObjects; } } public object this[uint uiIndex] { get { if (m_LastAccessed == null) { m_LastAccessed = m_First; m_lLastAccessed = 0; return m_First.m_ObjectToStore; } if (uiIndex = m_uiNumOfObjects) { throw new IndexOutOfRangeException(); } ++m_lLastAccessed; m_LastAccessed = m_LastAccessed.m_Next; return m_LastAccessed.m_ObjectToStore; } } } } /**************************************************************************** public void OnMouseDown(object source MouseEventArgs evtArgs) { // Here the draw action has started. if(count==0) { m_Start = new Point(evtArgs.X evtArgs.Y); m_ShapeBeingDrawn = true; //this.MouseUp += new MouseEventHandler(OnMouseUp); //this.MouseMove += new MouseEventHandler(OnMouseMove); childObj.gObj.setSelect(false); childObj.gObj.setCount(-1); s[arrSize]=new Point(evtArgs.X evtArgs.Y); arrSize=arrSize+1; //this.label1.Text=arrSize.ToString(); } } public void OnMouseUp(object source MouseEventArgs evtArgs) { try { Shape shapeDrawn = GetShape(source evtArgs); if (m_ShapesList == null) { m_ShapesList = new LinkedList(); } m_PreviousShape = null; m_ShapesList.AddToEnd(shapeDrawn); m_ShapeBeingDrawn = false; } catch(Exception e) { MessageBox.Show(e.Message); } } public void OnMouseMove(object source MouseEventArgs evtArgs) { if (!m_ShapeBeingDrawn) { return; } if (m_PreviousShape != null) { m_PreviousShape.Draw(this); } m_PreviousShape = GetShape(source evtArgs); m_PreviousShape.Draw(this); } /**************************************************************************** this.MouseDown += new MouseEventHandler(OnMouseDown); this.MouseUp += new MouseEventHandler(OnMouseUp); this.MouseMove += new MouseEventHandler(OnMouseMove);

Administrator · Answer

Hi Ncyoong. Following code explains how to create drag drop effect with GDI+ you can use same method in your code. http://www.c-sharpcorner.com/Code/2002/May/MasterMindWithDragDrop.asp hope this helps Jigar