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# Form Manipulation

schenkp asked
on
Medium Priority
234 Views
Last Modified: 2010-04-16
Lets say you have a form that is 300 high by 700 long.... now the user fires an event and the bottom half of the form slides out slowly so not you have a form that is 700 high by 700 long.

You see the effect I am looking for, any code examples would be greatly appreciated.
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Senior Developer
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Commented:
Not exactly sure what do you want to achieve. However, if for example user presses a button the form should change its height to 700. Slowly :)
That's pretty easy:

private void button1_Click(object sender, EventArgs e)
{
timer1.Start();
}

private void timer1_Tick(object sender, EventArgs e)
{
this.Height += 10;
if (this.Height >= 700)
timer1.Stop();
}

All you need is to twick a bit with timer interval and increment (this.Height += 10).

Commented:
i think the timer is overhead, why not simply put the height in the event handler and avoid the timer?

private void button1_Click(object sender, EventArgs e)
{
while (this.Height < 700) {
this.Height += 50;
}
}

Commented:
Not the effect Iâ€™m looking for maybe i did not explain myself thoroughly enough....

I would like the hidden area to slide into the bottom of the form over say 4 seconds....

Commented:
if you want to do it in a predefined time you will need to use a timer as anarki_jimbel suggested...
so you need to make the form 700 height, and currently its 300 height. so you need to sum about 100 to its height every second to get to 700.

set the timer's interval to 1000 (1s) and

private void timer1_Tick(object sender, EventArgs e)
{
this.Height += 100;
if (this.Height >= 700)
timer1.Stop();
}

as he suggested.
Commented:
if you would like nicer slide effect, you should do some calculations on your head. for example, drop the Interval to 500 (half a second) and increase height by 50. or drop the timer interval to 250 (quarter of a second) and increase height by 25. just simple math, as you keep getting the interval smaller, calculate how many intervals it will take to get the correct height when it hits 4 seconds.
if you keep calculating where i left off and use my system, you need to halve the interval and halve the height. this way you wont get lost.

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Senior Developer
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Commented:
2 newyuppie

"i think the timer is overhead"
Don't think so: while you run 'while' loop you form is effectivly unaccessible. Bad practice.

2 schenkp
Pls explain your scenario once more.
As I understand now, avter the event 'hidden' area became visible and dissapears after say for seconds?
Or some 'hidden are' stretches to bottom after 4 seconds?
Or what?

Commented:
OK I have 2 panels visible in the 300 x 700 area, in the hidden area I have a some more panels and some controls  etc.   When an event is fired in the 300 x 700 area I would like the bottom half to slide out from 300 x 700 to 700 x 700 over a 4 second period.
I donâ€™t want the opacity to fade in, I would like to have the panel slide out if possible.
I am will to buy a 3rd party piece of software to achieve this effect if I have to.
Senior Developer
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Commented:
It's not too basic task, I think.
say I have two panes, one visible and one hiddent beneath. When I click the button I shift panel2 location to make it visible.
That's easy. However redrawing the form may look ugly but this is another story:

private void button1_Click(object sender, EventArgs e)
{
timer1.Start();
}

private void timer1_Tick(object sender, EventArgs e)
{
this.Height += 10;

panel2.SetBounds(panel2.Location.X, panel2.Location.Y+10,panel2.Height, panel2.Width);
if (this.Height >= 700)
timer1.Stop();
}

Commented:
use Javascript :

http://www.dhtmlcentral.com/script/script.asp?id=25

In this example you can write your html code in menu division.

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