clear fillEllipse graphics

[Slickuser]

I have this function that will fill the ellipse every 10 seconds with
specific x,y,w,h.

Now I want do the the reverse, to clear the ellipse with given x,y
using Timer at every 30s.
Or I have put these (x,y,w,h) to an array?
Later go back the array and fill ellipse with the same color as
background?

Is there an easy way?

Thanks..

//Sample code that draw with timer

private void drawNote(int x, int y, int width, int height,
SolidBrush brush)
{
Graphics graphicGlobal = this.CreateGrap hics();
this.Show();

graphicGlobal.F illEllipse(brus h, x, y, width, height);

}

// Timer to draw
private void timer_note_Tick (object sender, EventArgs e)
{
SolidBrush colorBrush = new SolidBrush(Colo r.Cyan);
SolidBrush colorBrush2 = new SolidBrush(Colo r.Magenta);

drawNote(x_glob al, y_global, width_global, height_global,
colorBrush);

drawNote(x_glob al + 15, y_global + 15, width_global,
height_global, colorBrush2);

x_global = x_global + 30;
y_global = y_global + 30;
}

[Hilton]

I think you need to dispose of graphicGlobal.

"Slickuser" <sl*********@gm ail.comwrote in message
news:51******** *************** ***********@d4g 2000prg.googleg roups.com...

>I have this function that will fill the ellipse every 10 seconds with
specific x,y,w,h.

Now I want do the the reverse, to clear the ellipse with given x,y
using Timer at every 30s.
Or I have put these (x,y,w,h) to an array?
Later go back the array and fill ellipse with the same color as
background?

Is there an easy way?

Thanks..

//Sample code that draw with timer

private void drawNote(int x, int y, int width, int height,
SolidBrush brush)
{
Graphics graphicGlobal = this.CreateGrap hics();
this.Show();

graphicGlobal.F illEllipse(brus h, x, y, width, height);

}

// Timer to draw
private void timer_note_Tick (object sender, EventArgs e)
{
SolidBrush colorBrush = new SolidBrush(Colo r.Cyan);
SolidBrush colorBrush2 = new SolidBrush(Colo r.Magenta);

drawNote(x_glob al, y_global, width_global, height_global,
colorBrush);

drawNote(x_glob al + 15, y_global + 15, width_global,
height_global, colorBrush2);

x_global = x_global + 30;
y_global = y_global + 30;
}

[=?Utf-8?B?RmFtaWx5IFRyZWUgTWlrZQ==?=]

"Slickuser" wrote:

I have this function that will fill the ellipse every 10 seconds with
specific x,y,w,h.

Now I want do the the reverse, to clear the ellipse with given x,y
using Timer at every 30s.
Or I have put these (x,y,w,h) to an array?
Later go back the array and fill ellipse with the same color as
background?

Is there an easy way?

Thanks..

//Sample code that draw with timer

private void drawNote(int x, int y, int width, int height,
SolidBrush brush)
{
Graphics graphicGlobal = this.CreateGrap hics();
this.Show();

graphicGlobal.F illEllipse(brus h, x, y, width, height);

}

// Timer to draw
private void timer_note_Tick (object sender, EventArgs e)
{
SolidBrush colorBrush = new SolidBrush(Colo r.Cyan);
SolidBrush colorBrush2 = new SolidBrush(Colo r.Magenta);

drawNote(x_glob al, y_global, width_global, height_global,
colorBrush);

drawNote(x_glob al + 15, y_global + 15, width_global,
height_global, colorBrush2);

x_global = x_global + 30;
y_global = y_global + 30;
}

Reread the advise to you in your post yesterday. It looks like you are
going back to drawing graphics outside the paint event.

[Slickuser]

If I use that way, I need some how to pass in a PaintEvents to draw.
That how why I choose doing this way.

On Nov 30, 4:53 am, Family Tree Mike
<FamilyTreeM... @discussions.mi crosoft.comwrot e:

"Slickuser" wrote:

I have this function that will fill the ellipse every 10 seconds with
specific x,y,w,h.

Now I want do the the reverse, to clear the ellipse with given x,y
using Timer at every 30s.
Or I have put these (x,y,w,h) to an array?
Later go back the array and fill ellipse with the same color as
background?

Is there an easy way?

Thanks..

//Sample code that draw with timer

private void drawNote(int x, int y, int width, int height,
SolidBrush brush)
{
Graphics graphicGlobal = this.CreateGrap hics();
this.Show();

graphicGlobal.F illEllipse(brus h, x, y, width, height);

}

// Timer to draw
private void timer_note_Tick (object sender, EventArgs e)
{
SolidBrush colorBrush = new SolidBrush(Colo r.Cyan);
SolidBrush colorBrush2 = new SolidBrush(Colo r.Magenta);

drawNote(x_glob al, y_global, width_global, height_global,
colorBrush);

drawNote(x_glob al + 15, y_global + 15, width_global,
height_global, colorBrush2);

x_global = x_global + 30;
y_global = y_global + 30;
}

Reread the advise to you in your post yesterday. It looks like you are
going back to drawing graphics outside the paint event.- Hide quoted text -

- Show quoted text -

[Peter Duniho]

On Fri, 30 Nov 2007 17:14:42 -0800, Slickuser <sl*********@gm ail.com
wrote:

I am looking through examples right now.

Eventually, you should find a discussion of the Paint event and what
PaintEventArgs contains.

Can you give me example that let call(or not) a function which draw at
x,y,w,h with PaintEventArgs?

In that discussion, you will find that the PaintEventArgs. Graphics member
provides the Graphics instance to which you need to draw.

I still want to call this function with this argument when I want it
to draw: drawNote(int x, int y, int width, int height, SolidBrush
brush)

Since the PaintEventArgs. Graphics member is the Graphics instance to which
you need to draw, that means that you need to pass the Graphics instance
from PaintEventArgs to any code that wants to draw. The simplest way to
do that would be to include it as a parameter to the method called from
the OnPaint() method or the Paint event handler (however you've decided to
implement it).

So:

private void drawNote(int x, int y, int width, int
height,SolidBru sh brush)

becomes:

private void drawNote(Graphi cs gfx, int x, int y, int width, int
height,SolidBru sh brush)

and the method body:

{
////PaintEventArg?? ?
//Graphics graphicGlobal = this.CreateGrap hics();
/// this.Show();

graphicGlobal.F illEllipse(brus h, x, y, width, height);

}

becomes:

{
gfx.FillEllipse (brush, x, y, width, height);
}

Hope that helps.

Pete

[Slickuser]

Which in that case, now I need to pass in Graphics as input argument
to call drawNote (5 input arguments)?

How can I achieve with my timer? Thank you so much for your help.

// Timer to draw
private void timer_note_Tick (object sender, EventArgs e)
{
SolidBrush colorBrush = new SolidBrush(Colo r.Cyan);
SolidBrush colorBrush2 = new SolidBrush(Colo r.Magenta);

//drawNote(x_glob al, y_global, width_global,
height_global,c olorBrush);

//drawNote(x_glob al + 15, y_global + 15,
width_global,he ight_global, colorBrush2);

x_global = x_global + 30;
y_global = y_global + 30;
}
On Nov 30, 5:23 pm, "Peter Duniho" <NpOeStPe...@nn owslpianmk.com>
wrote:

On Fri, 30 Nov 2007 17:14:42 -0800, Slickuser <slick.us...@gm ail.com>
wrote:

I am looking through examples right now.

Eventually, you should find a discussion of the Paint event and what
PaintEventArgs contains.

Can you give me example that let call(or not) a function which draw at
x,y,w,h with PaintEventArgs?

In that discussion, you will find that the PaintEventArgs. Graphics member
provides the Graphics instance to which you need to draw.

I still want to call this function with this argument when I want it
to draw: drawNote(int x, int y, int width, int height, SolidBrush
brush)

Since the PaintEventArgs. Graphics member is the Graphics instance to which
you need to draw, that means that you need to pass the Graphics instance
from PaintEventArgs to any code that wants to draw. The simplest way to
do that would be to include it as a parameter to the method called from
the OnPaint() method or the Paint event handler (however you've decided to
implement it).

So:

private void drawNote(int x, int y, int width, int
height,SolidBru sh brush)

becomes:

private void drawNote(Graphi cs gfx, int x, int y, int width, int
height,SolidBru sh brush)

and the method body:

{
////PaintEventArg?? ?
//Graphics graphicGlobal = this.CreateGrap hics();
/// this.Show();

graphicGlobal.F illEllipse(brus h, x, y, width, height);

}

becomes:

{
gfx.FillEllipse (brush, x, y, width, height);
}

Hope that helps.

Pete

[Slickuser]

I should use ??

protected override void OnPaint(PaintEv entArgs e)
{
// If there is an image and it has a location,
// paint it when the Form is repainted.
base.OnPaint(e) ;
//base.Invalidate ();

}

On Nov 30, 5:48 pm, Slickuser <slick.us...@gm ail.comwrote:

Which in that case, now I need to pass in Graphics as input argument
to call drawNote (5 input arguments)?

How can I achieve with my timer? Thank you so much for your help.

// Timer to draw
private void timer_note_Tick (object sender, EventArgs e)
{
SolidBrush colorBrush = new SolidBrush(Colo r.Cyan);
SolidBrush colorBrush2 = new SolidBrush(Colo r.Magenta);

//drawNote(x_glob al, y_global, width_global,
height_global,c olorBrush);

//drawNote(x_glob al + 15, y_global + 15,
width_global,he ight_global, colorBrush2);

x_global = x_global + 30;
y_global = y_global + 30;
}

On Nov 30, 5:23 pm, "Peter Duniho" <NpOeStPe...@nn owslpianmk.com>
wrote:

On Fri, 30 Nov 2007 17:14:42 -0800, Slickuser <slick.us...@gm ail.com>
wrote:

I am looking through examples right now.

Eventually, you should find a discussion of the Paint event and what
PaintEventArgs contains.

Can you give me example that let call(or not) a function which draw at
x,y,w,h with PaintEventArgs?

In that discussion, you will find that the PaintEventArgs. Graphics member
provides the Graphics instance to which you need to draw.

I still want to call this function with this argument when I want it
to draw: drawNote(int x, int y, int width, int height, SolidBrush
brush)

Since the PaintEventArgs. Graphics member is the Graphics instance to which
you need to draw, that means that you need to pass the Graphics instance
from PaintEventArgs to any code that wants to draw. The simplest way to
do that would be to include it as a parameter to the method called from
the OnPaint() method or the Paint event handler (however you've decided to
implement it).

So:

private void drawNote(int x, int y, int width, int
height,SolidBru sh brush)

becomes:

private void drawNote(Graphi cs gfx, int x, int y, int width, int
height,SolidBru sh brush)

and the method body:

{
////PaintEventArg?? ?
//Graphics graphicGlobal = this.CreateGrap hics();
/// this.Show();

graphicGlobal.F illEllipse(brus h, x, y, width, height);

}

becomes:

{
gfx.FillEllipse (brush, x, y, width, height);
}

Hope that helps.

Pete

[Peter Duniho]

On Fri, 30 Nov 2007 17:48:37 -0800, Slickuser <sl*********@gm ail.com>
wrote:

Which in that case, now I need to pass in Graphics as input argument
to call drawNote (5 input arguments)?

Yes. If it bothers you and your drawing code is complex enough, you may
find it makes sense to create a class instantiated for each time you draw
and to which you pass the Graphics instance as well as any other
frequently-used data items you might want access to from the drawing code.

How can I achieve with my timer? Thank you so much for your help.

You don't draw in response to a timer. You can update your data, and then
invalidate the area of the control/form that needs to be redrawn
(depending on the data and what you're drawing, this might just be the
whole control or form).

Pete

[Peter Duniho]

On Fri, 30 Nov 2007 17:51:37 -0800, Slickuser <sl*********@gm ail.com>
wrote:

I should use ??

protected override void OnPaint(PaintEv entArgs e)
{
// If there is an image and it has a location,
// paint it when the Form is repainted.
base.OnPaint(e) ;
//base.Invalidate ();

}

That depends. Are you putting the drawing code into the same class as
that which represents the control or form into which the drawing is
actually being done? If so, then yes...I personally feel that writing an
override for OnPaint() is more appropriate than handling the Paint event.

Note: you almost always will want to call the base.OnPaint() as you've
shown there. However, you should _never_ call Invalidate() from within
OnPaint() or a Paint event handler. I realize the line is commented out
here, but it should never have been there in the first place.

Pete

[Slickuser]

On Nov 30, 6:07 pm, "Peter Duniho" <NpOeStPe...@nn owslpianmk.com>
wrote:

On Fri, 30 Nov 2007 17:48:37 -0800, Slickuser <slick.us...@gm ail.com>
wrote:

Which in that case, now I need to pass in Graphics as input argument
to call drawNote (5 input arguments)?

Yes. If it bothers you and your drawing code is complex enough, you may
find it makes sense to create a class instantiated for each time you draw
and to which you pass the Graphics instance as well as any other
frequently-used data items you might want access to from the drawing code.

How can I achieve with my timer? Thank you so much for your help.

You don't draw in response to a timer. You can update your data, and then
invalidate the area of the control/form that needs to be redrawn
(depending on the data and what you're drawing, this might just be the
whole control or form).

Pete

Update my data of x,y,...?
Here is my code so far..
//code

using System;
using System.Collecti ons.Generic;
using System.Componen tModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows. Forms;

namespace fill3
{
public partial class Form1 : Form
{

int x_global = 10;
int y_global = 10;
int width_global = 50;
int height_global = 50;

public Form1()
{
InitializeCompo nent();
}

private void Form1_Load(obje ct sender, EventArgs e)
{

}

private void timer_note_Tick (object sender, EventArgs e)
{
SolidBrush colorBrush = new SolidBrush(Colo r.Cyan);
SolidBrush colorBrush2 = new SolidBrush(Colo r.Magenta);

//drawNote(x_glob al, y_global, width_global,
height_global, colorBrush);
//drawNote(x_glob al + 15, y_global + 15, width_global,
height_global, colorBrush2);

x_global = x_global + 30;
y_global = y_global + 30;
}
private void drawNote(Graphi cs gfx, int x, int y, int width,
int height,SolidBru sh brush)
{
gfx.FillEllipse (brush, x, y, width, height);

gfx.Dispose();
this.Invalidate ();
}

}
}