Hi,
im taking some C# courses , and we have to make in order to pass first course a Paintapplication like the one windows uses...
It will be a hard C# project for me.
We got as support only one code that generates a rectangle <black> on a small form... (one of the tolls of my Paint Application), using this code we must think a way of coding the rest of the tools
so...
So i have only 2 weeks to realise something like this, and i already started understanding that rectangle code i got . But i have some questions and problems that i want to solve first(and i will make screens and copy current source codes to see my point when i need help),
so please help me making this program... i know that Paint.Net gives its source code, but i want to make a basic Paint Program that will have:
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Tools that my Paint Program will have:
1)Pencil
2)Brush
3)Line
4)CurveLine
5)Rectangle
6)Ellipse
si probabil 7)Text
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i will add a color palette formed of many panels (painted with a color), and when i click one , the color will change...
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and ... i would like a lot to have a small panel where i can PREVIEWthe painting ->somewhere to the left or right ,like Paint.Net has. It will be neat to have one ...
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***My Curent Problem:[/b]***
i have a small problem with the Draw Rectangle code i mentioned earlier...
After i draw a rectangle and i wanna start making the second one, the first one DISSAPEARs!
i keep looking at the source code and i cant find a way so that the rectangles will be added to the form (not displaying only one)....
Print Screen here:
Here is the Code:
using System;
using System.Drawing;
using System.Windows.Forms;
class BlockOut : Form
{
bool bBlocking, bValidBox;
Point ptBeg, ptEnd;
Rectangle rectBox;
public static void Main()
{
Application.Run(new BlockOut());
}
public BlockOut()
{
Text = "Dreptunghi Draw by DSH";
BackColor = SystemColors.Window;
ForeColor = SystemColors.WindowText;
}
protected override void OnMouseDown(MouseEventArgs mea)
{
if (mea.Button == MouseButtons.Left)
{
ptBeg = ptEnd = new Point(mea.X, mea.Y);
Graphics grfx = CreateGraphics();
grfx.DrawRectangle(new Pen(ForeColor), Rect(ptBeg, ptEnd));
grfx.Dispose();
bBlocking = true;
}
}
protected override void OnMouseMove(MouseEventArgs mea)
{
if (bBlocking)
{
Graphics grfx = CreateGraphics();
grfx.DrawRectangle(new Pen(BackColor), Rect(ptBeg, ptEnd));
ptEnd = new Point(mea.X, mea.Y);
grfx.DrawRectangle(new Pen(ForeColor), Rect(ptBeg, ptEnd));
grfx.Dispose();
Invalidate();
}
}
protected override void OnMouseUp(MouseEventArgs mea)
{
if (bBlocking && mea.Button == MouseButtons.Left)
{
Graphics grfx = CreateGraphics();
rectBox = Rect(ptBeg, new Point(mea.X, mea.Y));
grfx.DrawRectangle(new Pen(ForeColor), rectBox);
grfx.Dispose();
bBlocking = false;
bValidBox = true;
Invalidate();
}
}
protected override void OnPaint(PaintEventArgs pea)
{
Graphics grfx = pea.Graphics;
if (bValidBox)
grfx.FillRectangle(new SolidBrush(ForeColor), rectBox);
if (bBlocking)
grfx.DrawRectangle(new Pen(ForeColor), Rect(ptBeg, ptEnd));
}
Rectangle Rect(Point ptBeg, Point ptEnd)
{
return new Rectangle(Math.Min(ptBeg.X, ptEnd.X), Math.Min(ptBeg.Y, ptEnd.Y), Math.Abs(ptEnd.X - ptBeg.X), Math.Abs(ptEnd.Y - ptBeg.Y));
}
}
