Answers
Nov 19, 2009 - 11:39 AM
Excuse me for my late. Suppose that I want to receive some points by clicking on the form and after receiving all of them I want to show a polygon resulted from connecting them. I want that program waits until at least 3 points have been selected by user on the form.
Mar 15, 2010 - 03:08 AM
The whole "wait" is purely user perception.Just create a bool flag that activates after you press the button.
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
List FinalPoints;
List NeededPoints;
public Form1()
{
InitializeComponent();
NeededPoints = new List();
FinalPoints = new List();
}
bool StartFlag;
Graphics grph;
private void MainButton_Click(object sender, EventArgs e)
{
if (MainButton.Text == "Start")
{
StartFlag = true;
MainButton.Text = "Stop";
}
else
{
StartFlag = false;
MainButton.Text = "Start";
}
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
if (StartFlag)
{
NeededPoints.Add(new Point(e.X, e.Y));
this.Invalidate(new Rectangle(new Point(0, 0), new Size(this.Width, this.Height - MainButton.Height)));
}
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
Point[] SelPoints;
if (NeededPoints.Count > 2)
{
grph = this.CreateGraphics();
SelPoints = NeededPoints.ToArray();
FinalPoints.Add(SelPoints);
foreach (Point[] ThreePoints in FinalPoints)
{
grph.DrawPolygon(Pens.Tomato, ThreePoints);
}
NeededPoints.Clear();
}
}
}
}
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
List
List
public Form1()
{
InitializeComponent();
NeededPoints = new List
FinalPoints = new List
}
bool StartFlag;
Graphics grph;
private void MainButton_Click(object sender, EventArgs e)
{
if (MainButton.Text == "Start")
{
StartFlag = true;
MainButton.Text = "Stop";
}
else
{
StartFlag = false;
MainButton.Text = "Start";
}
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
if (StartFlag)
{
NeededPoints.Add(new Point(e.X, e.Y));
this.Invalidate(new Rectangle(new Point(0, 0), new Size(this.Width, this.Height - MainButton.Height)));
}
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
Point[] SelPoints;
if (NeededPoints.Count > 2)
{
grph = this.CreateGraphics();
SelPoints = NeededPoints.ToArray();
FinalPoints.Add(SelPoints);
foreach (Point[] ThreePoints in FinalPoints)
{
grph.DrawPolygon(Pens.Tomato, ThreePoints);
}
NeededPoints.Clear();
}
}
}
}
Mar 16, 2010 - 03:15 AM
Thanks, your program works excellent, but suppose that there are other buttons. What which I really mean from "wait" is that other buttons preforms no action before clicking all of the points. I can do this by making their Enable property to false. But it is not appropriate in my application. I want that all of the keys and menus be active and their enabled property be true but they perform no task during the entering points.
Thanks again
Thanks again
Mar 16, 2010 - 05:34 PM
You got me all confused with what you're trying to achieve.
" What which I really mean from "wait" is that other buttons preforms no action before clicking all of the points ".You have complete power on what should happen when any button is pressed.In the code I gave you, you could add any other button and still execute some other actions regardless of what's happening with the form redrawing.Please explain yourself with a concrete example,maybe that way I'll be able to provide some useful help..
Daniel
" What which I really mean from "wait" is that other buttons preforms no action before clicking all of the points ".You have complete power on what should happen when any button is pressed.In the code I gave you, you could add any other button and still execute some other actions regardless of what's happening with the form redrawing.Please explain yourself with a concrete example,maybe that way I'll be able to provide some useful help..
Daniel
Apr 13, 2010 - 12:17 PM
Thanks Daniel, you are right using StartFlag in your code I can prevent other controls to do any action. For example if I have a button called FillButton its even handler is as below:
private void FillButton_Click(object sender, EventArgs e)
{
if (!StartFlag)
{
// Do Something
}
}
Thanks again
private void FillButton_Click(object sender, EventArgs e)
{
if (!StartFlag)
{
// Do Something
}
}
Thanks again
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Dec 28, 2010 - 06:43 AM
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