I have a tsak which is let the user draw any number of rectangles in a panel and if he want to move one of them use the mouse How can I do that please the problem faces me:
1. How let him draw many of them
2. How can he select certain one and move it
Please help me please
What have you done so far? Can we see some code so we know how to help.
Without anything I'd say learn how to handle mouse event. Having a click handler on a form would allow you to create rectangles.
Have you looked at the WIndows Presentation Foundation. I'm almost certain there's a relatively easy way to do it with that. At least, moving those rectangles will be a breeze.
this is the code I wrote it about allow the user to draw lines and polygons not rectange but in this code all figures are continue the code is:
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace GDI1
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.GroupBox groupBox1;
private System.Windows.Forms.RadioButton lineOption;
private System.Windows.Forms.RadioButton polygonOption;
private System.Windows.Forms.RadioButton filledPolygonOption;
private System.Windows.Forms.Button clearButton;
private System.Windows.Forms.Button colorButton;
private System.Windows.Forms.Panel drawPanel;
private ArrayList points=new ArrayList();
Pen pen=new Pen(Color.DarkBlue);
SolidBrush brush=new SolidBrush(Color.DarkBlue);
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void drawPanel_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
//if(e.Button==MouseButtons.Right)
//{
points.Add(new Point(e.X,e.Y));
drawPanel.Invalidate();
//}
}
private void clearButton_Click(object sender, System.EventArgs e)
{
points =new ArrayList();
drawPanel.Invalidate();
}
private void lineOption_CheckedChanged(object sender, System.EventArgs e)
{
drawPanel.Invalidate();
}
private void polygonOption_CheckedChanged(object sender, System.EventArgs e)
{
drawPanel.Invalidate();
}
private void filledPolygonOption_CheckedChanged(object sender, System.EventArgs e)
{
drawPanel.Invalidate();
}
private void colorButton_Click(object sender, System.EventArgs e)
{
ColorDialog dialogcolor=new ColorDialog();
DialogResult result= dialogcolor.ShowDialog();
if(result== DialogResult.Cancel)
return;
pen.Color=dialogcolor.Color;
brush.Color=dialogcolor.Color;
drawPanel.Invalidate();
}
private void drawPanel_Paint_1(object sender, System.Windows.Forms.PaintEventArgs e)
{
Graphics graphicsobject= e.Graphics;
if(points.Count>1)
{
Point[] pointarray= (Point[])points.ToArray(points[0].GetType());
if(polygonOption.Checked)
graphicsobject.DrawPolygon(pen,pointarray);
else if(lineOption.Checked)
graphicsobject.DrawLines(pen,pointarray);
else if(filledPolygonOption.Checked)
graphicsobject.FillPolygon(brush,pointarray);
}
}
}
}
I guess that u can solve the problem by create a user control and display it as a rectangle in your project u emplement it's events to achive the goal
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