Re: Strange behaviour - C# Discussion Boards

21-Mar-07 6:17

Hi,

I need to build a complex region dividing system.

For example, i want to divide the display in two and then divide one of those sub displays in two again, etc.

For that i'm using the split container.

Basicly i need to dynamicly create split containers.

In the end i need to output a xml file with the regions sizes.

Well, i'm in the beggining of this problem.

For now i have two buttons. One that creates a horizontal split and another a vertical split.

For that i invocate the following method, changing only the orientation:

<br />
private void addNewRegion(System.Windows.Forms.Orientation o)<br />
        {<br />
            <br />
            SplitContainer region = new SplitContainer();<br />
            region.SuspendLayout();<br />
            this.SuspendLayout();<br />
<br />
            region.Dock = System.Windows.Forms.DockStyle.Fill;<br />
            region.Location = new System.Drawing.Point(0, 0);<br />
            region.Name = "region";<br />
            region.Size = new System.Drawing.Size(292, 266);<br />
            region.SplitterDistance = Int32.Parse(p.width)/2;<br />
            region.TabIndex = 0;<br />
            region.Orientation = o;<br />
<br />
            this.Controls.Add(region);<br />
            region.ResumeLayout(false);<br />
            this.ResumeLayout(false);<br />
        }<br />

Following the process described above it doesnt work. However if i past the body of the addNewRegion into the Form1_load, the split container is create.

Can anyone explain me why this doesnt work?

Maybe i need to redesign the form. Maybe not.

Any ideas?

Thx,

Nuno

Stefan Troschuetz21-Mar-07 6:49

Stefan Troschuetz

21-Mar-07 6:49

Try calling this.PerformLayout at the end of the method.

sinosoidal21-Mar-07 6:50

21-Mar-07 6:50

Hi,

Didnt work! Frown | :(

Nuno

sinosoidal21-Mar-07 6:53

21-Mar-07 6:53

Something has happened!

If i click on the button nothings happens, but, if i minimize and restore the window again, the container gets draw.

This helps??

Nuno

Stefan Troschuetz21-Mar-07 6:58

Stefan Troschuetz

21-Mar-07 6:58

The container gets added correctly to the form, but you have to explicitely tell the form to redraw. Add a call to the Refresh method.

sinosoidal21-Mar-07 7:39

21-Mar-07 7:39

Hi,

Didnt work as well! Frown | :(

Nuno

Edmundisme21-Mar-07 7:05

21-Mar-07 7:05

It's not clear to me from your post what behavior you're seeing with this. However, if I understand you correctly, you want a vertical splitter that contains a horizontal splitter in one of its two panels. In order to accomplish this, you need to add the horizontal splitter to the controls collection of the panel you want the horizontal splitter to be contained by. In the above code, whenever you call addNewRegion a new splitter is created and it is added to the form's controls collection. This won't work.

Also, it seems you are over complicated the problem. If you are setting the Dock property of the splitter to DockStyle.Fill, then the control will automatically fill the bounds of the form. So you don't need to set the location or the size.

I would try the following and massage it as needed:

// create the vertical splitter
SplitContainer verticalSplitter = new SplitContainer();
verticalSplitter.Orientation = Orientation.Vertical;
verticalSplitter.Dock = DockStyle.Fill;

// create the horizontal splitter
SplitContainer horizontalSplitter = new SplitContainer();
horizontalSplitter.Orientation = Orientation.Horizontal;
horizontalSplitter.Dock = DockStyle.Fill;

// add the vertical splitter to the form
this.Controls.Add(verticalSplitter);

// add the horizontal splitter to the first panel of the vertical splitter
verticalSplitter.Panel1.Controls.Add(horizontalSplitter);

...

Hope this helps.

sinosoidal21-Mar-07 7:33

21-Mar-07 7:33

Hi,

I have conscience of what you have just told me but i need to have the freedom to add as many splitContainers inside another splitContainer, recursively.

I don't know how am i gonna do that yet. I'm thinking in keep a structure, like a binary tree to keep track of the info of each splitContainer.

The first will be the root of the tree. If i then want another splitContainer inside the panel2 of the first splitContainer, i'll need to add a new node to the tree at the root's right. And if then i want another split container, inside the seconde split container, etc...

But, for now, i'm just testing the first level, with the most basic example.

My problem right now is with the form refresh.

As i said, the body, of the method, if executed inside the Form1_Load(..) will create a splitContainer soon as the program is executed.

However, if i call the code inside the AddNewRegion(..) method, it is not drawn.

Accidentally i found that, once executed the application, and pressed the button that executes code (which seems not to draw a thing), if i minimize and then restore the window, i can see the splitContainer drawn.

Did you understand me now?

Now i have sure that this is a refresh problem, but i still don't know how to solve it.

Any tips?

Thx,

Nuno

Edmundisme21-Mar-07 7:42

21-Mar-07 7:42

The SplitContainer control is meant to contain something. By itself, it doesn't always paint correctly. I'm not sure why this is but it is not too much of a problem because a SplitContainer that contains nothing should never exist in an application. Try putting something in the panels of the split containers and see if your problem goes away.

sinosoidal21-Mar-07 7:51

21-Mar-07 7:51

Nope... at least with what i done, which was the following:

<br />
            SplitContainer region = new SplitContainer();<br />
            Panel panel = new Panel(); <---<br />
<br />
            region.SuspendLayout();<br />
            this.SuspendLayout();<br />
<br />
            region.Dock = System.Windows.Forms.DockStyle.Fill;<br />
            region.Location = new System.Drawing.Point(0, 0);<br />
            region.Name = "region";<br />
            region.Size = new System.Drawing.Size(292, 266);<br />
            region.SplitterDistance = Int32.Parse(p.width)/2;<br />
            region.TabIndex = 0;<br />
            region.Orientation = o;<br />
<br />
<br />
            region.Panel1.Controls.Add(panel); <-----<br />
            this.Controls.Add(region);<br />
            region.ResumeLayout(false);<br />
<br />
            regions.Add(region);<br />
<br />
            this.PerformLayout();<br />
            this.Refresh();<br />

Edmundisme21-Mar-07 8:23

21-Mar-07 8:23

I discovered why SplitContainers seem to paint strangely. They have not border by default. YOu have to set their BorderStyle property in order for it to paint borders.

Try:

region.BorderStyle = BorderStyle.Fixed3;

sinosoidal22-Mar-07 0:13

22-Mar-07 0:13

Yes, that's it!

Thank you very much!

Nuno

sinosoidal22-Mar-07 0:45

22-Mar-07 0:45

Hi,

I would your help again.

As i was inserting the splitContainer into the main form directly, it was being draw at the position (0,0), staying under a menu bar i had already defined.

To bypass this problem, i putted a panel to define the area i want for this control. Ok, the split container is now being drawn at the point (0,0) of the panel.

Now that i can see the splitContainer that is created i have another problem.

Altough the property dock is defined to fill, it doesnt appear filled, it appears with a very small size inside the panel.

When i move the spliter, the splitContainer becomes filled to the panel.

I tried to refresh() but it doesnt work.

Any tips?

Thx,

Nuno

Edmundisme22-Mar-07 6:07

22-Mar-07 6:07

I can't seem to duplicate your problem. Perhaps I don't understand you correctly.

I made a Panel smaller than the form's ClientRectangle and added it to the form. I then added a SplitContainer with a DockStyle of Fill to the panel. My SplitContainer fills the panel's client rectangle.

Am I misunderstanding your problem? You don't want your SplitContainer to fill the client rectangle of the form, so you created a panel with the dimensions and location you want the SplitContainer to have, then you added the SplitContainer (with DockStyle.fill) to the panel, but it doesn't fill the panel until you drag the splitter? Is that correct?

sinosoidal22-Mar-07 6:28

22-Mar-07 6:28

No, you are not fully understanding the problem.

The main difference is that i'm only adding the panel dragging and drop the control to the form, because the splitContainers are being added dynamicly with code.

I have bypassed the problem though, taking out the resumeLayout and SuspendLayout methods invocations.

I don't know if this is going to bring me problems in the future, but i have found someone here who doesnt use them without any problems.

Thx,

Nuno

Edmundisme21-Mar-07 7:10

21-Mar-07 7:10

As a side note, it is a programming convention to use uppercase names for methods, i.e. AddNewRegion rather than addNewRegion.

Database to Dataset to DataTable then Another table using query

Muammar©21-Mar-07 8:22

Muammar©

21-Mar-07 8:22

Smile: A curve that can set a lot of things straight!
(\ /)
(O.o)
(><)

Sarfaraj Ahmed21-Mar-07 6:12

Sarfaraj Ahmed

21-Mar-07 6:12

I have alredy added a DataSet name Publications where I have add three tables.
Table(0) is Query_Volume_VolumeLessons
Table(1) is Query_Volume_Sectos
Table(2) is Query_Volume_Themes

Also put data on Table(0) from SQL SERVER DataBase

Now How can I put data to Table(1) From Table(0) , using a sqlQuery

Thanks

Sarfarj Ahmed

two problems in windows form

ahmad al-omar21-Mar-07 5:59

ahmad al-omar

21-Mar-07 5:59

dear ;
i have a problem with my windows form because when i run the program which contains a graphs in pictureboxes the graphes appears but when i minimize the form and get it back ,,,the graphes dissapears ???!! really i want to know how to over come with this problem.

the second is how to print my windows form by clicking on print button??

thank you ... thank you....

ahmad al-omar

Shy Agam21-Mar-07 7:42

Shy Agam

21-Mar-07 7:42

Are you painting the graph on the PictureBox?
If so, where is the painting code executed from?
Try using the form's Paint event in order to redraw the graph on the PictureBox.

Regards,
Shy.

ahmad al-omar21-Mar-07 8:51

ahmad al-omar

21-Mar-07 8:51

the graph made by mouse move this is the code below :

Graphics gy = pictureBox4.CreateGraphics();

gy.FillEllipse(new SolidBrush(Color.Blue),i,y_pos[i]+50,3,3);

thank you

ahmad al-omar

Shy Agam21-Mar-07 9:36

Shy Agam

21-Mar-07 9:36

When you paint something on a control you have to repaint it whenever the control repaints itself.
When you minimize the form and restore it, all of the controls on the form are automatically repainted.
However, any painting you made on the controls are not repainted.

Use the PictureBox.Paint event and place your code there in order to repaint the ellipse everytime the PictureBox repaints itself.

Regards,
Shy.