TabStrips: A TabControl in the Visual Studio 2005 way!

Sample Image - TabStrip.gif

Introduction

Besides all the new features of Visual Studio, there is a distinct TabControl with a new style like no other. The code here tries to build up a control which behaves like the tab pages of VS.NET 2005.

Building a TabControl consists of building two controls: a TabControl itself, which is a container control, but only accepts TabPages as a containing control. This could be done by assigning a Designer class to the TabControl. Now, TabPage is a container control too, but can accept all kinds of controls hosted in it.

The Visual Studio TabControl slightly differs from a normal tab control, because it only shows as much TabPages as fits the width of the control. All the other TabPages are available via a context menu appearing by clicking the glyph icon. Selecting a TabPage from the menu brings it to position 0 of the TabPageCollection, so that it appears as the first TabPage.

Right-To-Left Rendering of Controls

Adding the RTL drawing feature to a control requires additional coding for drawing. The developer should handle the correct drawing behavior when the control sets its RightToLeft property to Yes. The Graphics class has a method to draw strings. In RTL control drawing, it is important to use the below overload with the StringFormat setting its FormatFlags flag to DirectionRightToLeft. Note that since the StringFormat class is not a lightweight class, you should dispose it after using. It's more convenient to use a using block to achieve this:

e.Graphics.DrawString(string, Font, Brush, Rectangle, StringFormat);

using (HeavyWeightDisposableObject obj = 
       new HeavyWeightDisposableObject()) 
{
   //Do Operation and leave; will automatically dispose
}

//
// paint method of the control
//

using(StringFormat fmt = new StringFormat())
{
    fmt.FormatFlags |= StringFormatFlags.DirectionRightToLeft;
    g.DrawString("Test String...", this.Font, 
                 SystemBrushes.Control, TextRectangle, fmt);
}

Design-Time Integration

For design-time behavior of the TabStrip control, I'm using a sub-class of the ParentControlDesigner class. It is nice to add the design-time verbs (e.g., Add/Remove TabPages) to this class, which makes life for the developer easier.

An additional step here is to remove the properties of the Control class which we do not want to be visible during design-time, by overriding the PreFilterProperties of the designer:

protected override void PreFilterProperties(
          System.Collections.IDictionary properties)
{
   base.PreFilterProperties(properties);

   properties.Remove("DockPadding");
   properties.Remove("DrawGrid");
   properties.Remove("Margin");
}

In a normal TabControl, the user can change the selected tab by clicking on the TabItems during design-time. To do this, we could override the GetHitTest(Point pt) method of the designer, but I don't know why it crashes my VS.NET IDE, so I had to think of another way. That's when tapping on Windows messages came in handy. Just override the WndProc(ref Message msg) method, and listen for the MouseLeftClick message (0x201), and check for a hit-test on TabItems:

protected override void WndProc(ref Message msg)
{
   if (msg.Msg == 0x201)
   {
      Point pt = Control.PointToClient(Cursor.Position);
      FATabStripItem itm = Control.GetTabItemByPoint(pt);
         
      if (itm != null)
      {
         Control.SelectedItem = itm;
         ArrayList selection = new ArrayList();
         selection.Add(itm);
         ISelectionService selectionService = 
           (ISelectionService)GetService(typeof(ISelectionService));
         selectionService.SetSelectedComponents(selection);
      }
   }

   base.WndProc(ref msg);
}

Points of Interest

If you want to use these controls on .NET 1.1, you'll have to change the use of ContextMenuStrip, which is a new control in .NET 2, with the old ContextMenu control. All the painting is done in GDI+, so it should work on Windows 98 or Windows 2000, although it is not tested yet.

For further releases or any suggestions/comments/feedbacks, please leave me a message at my address, or visit my web site.

History

Version 2

Bug fix: Problem with the Designer which made controls added to FATabStripItems disappear.
Bug fix: Disposing of heavy-weight objects when the control is being disposed (e.g., fonts, image, etc.) (reported by #sne#).
Bug fix: Problem with anchoring of controls/usercontrols in a FATabStripItems (reported by #sne#).
Added: FATabStripItems can now have an image which will be displayed on menu (thanks to danielku15).
Added: A HitTest method which will report which part of the control is clicked by the user.
Changes: Refactoring Selecting method of FATabItem.

Version 1

Providing base classes, and a TabStrip control with the Visual Studio 2005 theme implemented.
Providing a control-designer for TabStrip and TabStripItems.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

About the Author

Hadi Eskandari

Software Developer (Senior)
SAM Enterprise

Iran (Islamic Republic Of)

Member

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Working on both Java and .NET Technology, I have developed various enterprise level applications on both platforms. Currently, I am working as a Senior Developer at SAM Enterprise company which resides in Tehran, Iran, and is a partner with S4M GmbH which develops solutions for media and is a Microsoft Gold Partner. I'm also a Microsoft Certified Professional Developer for Web, Windows and Enterprise applications.

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Comments and Discussions

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Just add close button.

Behzad Sedighzadeh

4:02 17 Dec '11

damet garm baba! ey val. Just if you can add close button to each tabpage - like VS2010 - then this control would be the best control i have ever used in CP. Thanks, Behzad
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mono

leosco

22:20 20 Nov '11

Does it work in Mono?
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It plans to add Tooltip to the TabPage (FATabStripItem)?

miguelagl

23:48 28 Sep '11

How could I implement this? Regards, ... Miguel
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Problem When Used With VS 2010

enkur

12:59 18 Sep '11

VS 2010 projects produce

Warning 3 The referenced assembly "E:\Projects\TabStrip\bin\Debug\TabStrip.dll" could not be resolved because it has a dependency on "System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" which is not in the currently targeted framework ".NETFramework,Version=v4.0,Profile=Client". Please remove references to assemblies not in the targeted framework or consider retargeting your project. Rolodex

when compiled.

VS 2005 projects work fine as do VS 2005 projects converted to VS 2010.

This is beyond my skills. Any advice?

Thanks
Enkur

Re: Problem When Used With VS 2010

Hadi Eskandari

19:13 18 Sep '11

Using full version of .NET and not the client profile versions will solve this problem.
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Re: Problem When Used With VS 2010

enkur

12:12 19 Sep '11

I downloaded and installed the full .net, dotNetFx40_Full_setup.exe. It didn't help. I worked around the problem by restarting the project with VS 2005 then converting to VS 2010. Thanks none-the-less, Enkur
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Re: Problem When Used With VS 2010

Santa's Little Helper

4:37 20 Dec '11

You have to set the Target Framework in VS to use '.Net Framework 4' and not '.Net Framework 4 Client Profile' If you using VB.Net, to change the setting go to the properties, click 'compile' on the left tab, then click 'Advanced Compile options' button. From the 'Target Framework' drop down select '.Net Framework 4'
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AutoScroll, Draggable, Colored Tabs, Images On Bar

Michael Pelland

2:38 14 Sep '11

After using this as a base for a gui I was working on I decided to post some of the extensions I added that answer some of your questions, see below:

Autoscroll
To answer the previous concerns about autoscrolling. I just docked a panel inside my tabpage:

Panel panel1 = new Panel();
panel1.AutoScroll = true;
UserControl1 uc1 = new UserControl1();
uc1.Dock = DockStyle.Fill;
panel1.Dock = DockStyle.Fill;
panel1.Controls.Add(uc1);
FATabStripItem tp = new FATabStripItem(treeView1.SelectedNode.Name, panel1);

Draggable
I updated FarsiLibrary.Win.FATabStrip class:

First add the following method to perform the move of the tabpage:

protected override void OnMouseUp(MouseEventArgs e)
      {
        base.OnMouseUp(e);
        if (moved)
        {
          Point p = new Point(e.X, e.Y);
          FATabStripItem dest = this.GetTabItemByPoint(p);
          FATabStripItem src = selectedItem; //Item being dragged is selected
          if (dest != null && src != null && dest != src)
          {
            System.Collections.ArrayList ar = new System.Collections.ArrayList(items.Count);
            int srcint = items.IndexOf(src);
            int destint = items.IndexOf(dest);
            for (int i = 0; i < items.Count; i++) //Add all the items except the src tab
            {
              if (i != srcint)
                ar.Add(items[i]);
            }
            ar.Insert(destint, src); //Insert the src tab at the destination
            items.Clear();
            items.AddRange((FATabStripItem[])ar.ToArray(typeof(FATabStripItem))); //Read all items to the tab list
            selectedItem = src; 
          }
        }
        moved = false; //End dragging and moving mode
        dragging = false;
        Cursor = Cursors.Default; //Return cursor to default state
      }

Then modify the following methods:

        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);
 
            if (e.Button != MouseButtons.Left)
                return;
 
            HitTestResult result = HitTest(e.Location);
            if(result == HitTestResult.MenuGlyph)
            {
                HandledEventArgs args = new HandledEventArgs(false);
                OnMenuItemsLoading(args);
                
                if (!args.Handled)
                    OnMenuItemsLoad(EventArgs.Empty);
 
                ShowMenu();
            }
            else if (result == HitTestResult.CloseButton)
            {
                if (SelectedItem != null)
                {
                    TabStripItemClosingEventArgs args = new TabStripItemClosingEventArgs(SelectedItem);
                    OnTabStripItemClosing(args);
                    if (!args.Cancel && SelectedItem.CanClose)
                    {
                        RemoveTab(SelectedItem);
                        OnTabStripItemClosed(EventArgs.Empty);
                    }
                }
            }
            else if(result == HitTestResult.TabItem)
            {
                FATabStripItem item = GetTabItemByPoint(e.Location);
                if (item != null)
                {
                  SelectedItem = item;
                  dragging = true; //Selecting an item toggles dragging mode
                }
            }
 
            Invalidate();
        }
 
        protected override void OnMouseMove(MouseEventArgs e)
        {
            base.OnMouseMove(e);
            moved = dragging; //If cursor is in dragging mode when moved, moved becomes true
            if (moved)
              Cursor = Cursors.UpArrow; //Change cursor type
            if (menuGlyph.Bounds.Contains(e.Location))
            {
                menuGlyph.IsMouseOver = true;
                Invalidate(menuGlyph.Bounds);
            }
            else
            {
                if (menuGlyph.IsMouseOver && !menuOpen)
                {
                    menuGlyph.IsMouseOver = false;
                    Invalidate(menuGlyph.Bounds);
                }
            }
 
            if (closeButton.Bounds.Contains(e.Location))
            {
                closeButton.IsMouseOver = true;
                Invalidate(closeButton.Bounds);
            }
            else
            {
                if (closeButton.IsMouseOver)
                {
                    closeButton.IsMouseOver = false;
                    Invalidate(closeButton.Bounds);
                }
            }
        }
 
        protected override void OnMouseLeave(EventArgs e)
        {
          dragging = false;//Turn off dragging mode when you leave
          moved = false;
            base.OnMouseLeave(e);
            menuGlyph.IsMouseOver = false;
            Invalidate(menuGlyph.Bounds);
 
            closeButton.IsMouseOver = false;
            Invalidate(closeButton.Bounds);
        }

You will also need to add these two fields:

    private bool dragging = false; //Dragging mode fields
    private bool moved = false;

Feel free to change the cursor image, I used uparrow, but whatever meets your need. A good improvement would be to change cursor in the hover event when hovering over a tab rectangle.

Tab-Effects
For Colored Tabs and tabs with images on them I modified the item class FarsiLibrary.Win.FATabStripItem
add these fields:

    private Color tabColor = SystemColors.Window;
    private Color selectColor = SystemColors.Control;

and these properties:

        public Color TabColor //Color of the tab while in the background
        {
          get { return tabColor; }
          set { tabColor = value; }
        }
 

        public Color SelectColor //Color of the tab when selected
        {
          get { return selectColor; }
          set { selectColor = value; }
        }

In the class FarsiLibrary.Win.FATabStrip I modified the method OnDrawTabPage. As you can see I only modified the left-to-right section but feel free to write mirror code for the right to left if you need it.

        private void OnDrawTabPage(Graphics g, FATabStripItem currentItem)
        {
            bool isFirstTab = Items.IndexOf(currentItem) == 0;
            Font currentFont = Font;
            int imageWidth = (currentItem.Image != null)? currentItem.Image.Size.Width : 0;
            if (currentItem == SelectedItem)
                currentFont = new Font(Font, FontStyle.Bold);
 
              SizeF textSize = g.MeasureString(currentItem.Title, currentFont, new SizeF(200, 10), sf);
              textSize.Width += 25 + imageWidth; //Added some more room to fit a 12x12 Image without losing text
            RectangleF buttonRect = currentItem.StripRect;
 
            GraphicsPath path = new GraphicsPath();
            LinearGradientBrush brush;
            int mtop = 3;
 
            #region Draw Not Right-To-Left Tab
 
            if (RightToLeft == RightToLeft.No)
            {
                if (currentItem == SelectedItem || isFirstTab)
                {
                    path.AddLine(buttonRect.Left - 10, buttonRect.Bottom - 1,
                                 buttonRect.Left + (buttonRect.Height/2) - 4, mtop + 4);
                }
                else
                {
                    path.AddLine(buttonRect.Left, buttonRect.Bottom - 1, buttonRect.Left,
                                 buttonRect.Bottom - (buttonRect.Height/2) - 2);
                    path.AddLine(buttonRect.Left, buttonRect.Bottom - (buttonRect.Height/2) - 3,
                                 buttonRect.Left + (buttonRect.Height/2) - 4, mtop + 3);
                }
 
                path.AddLine(buttonRect.Left + (buttonRect.Height/2) + 2, mtop, buttonRect.Right - 3, mtop);
                path.AddLine(buttonRect.Right, mtop + 2, buttonRect.Right, buttonRect.Bottom - 1);
                path.AddLine(buttonRect.Right - 4, buttonRect.Bottom - 1, buttonRect.Left, buttonRect.Bottom - 1);
                path.CloseFigure();
 
                if (currentItem == SelectedItem)
                {
                  brush =
                      new LinearGradientBrush(buttonRect, SystemColors.ControlLightLight, currentItem.SelectColor,
                                              LinearGradientMode.Vertical); //Set color to SelectColor property
                }
                else
                {
                  brush =
                      new LinearGradientBrush(buttonRect, SystemColors.ControlLightLight, currentItem.TabColor,
                                              LinearGradientMode.Vertical); //Set color to TabColor property
                }
 
                g.FillPath(brush, path);
                g.DrawPath(SystemPens.ControlDark, path);
 
                if (currentItem == SelectedItem)
                {
                    g.DrawLine(new Pen(brush), buttonRect.Left - 9, buttonRect.Height + 2,
                               buttonRect.Left + buttonRect.Width - 1, buttonRect.Height + 2);
                }
                if (currentItem.Image != null) //Draw the image next to the text in the tab
                  g.DrawImage(currentItem.Image, new PointF(buttonRect.Left + buttonRect.Height-5, buttonRect.Top + (buttonRect.Height-currentItem.Image.Size.Height)/2));
                PointF textLoc = new PointF(buttonRect.Left + buttonRect.Height + imageWidth, buttonRect.Top + (buttonRect.Height/2) - (textSize.Height/2) - 3);//move the textloc over to make room for the image
                RectangleF textRect = buttonRect;
                textRect.Location = textLoc;
                textRect.Width = buttonRect.Width - (textRect.Left - buttonRect.Left) - 4;
                textRect.Height = textSize.Height + currentFont.Size/2;
 
                if (currentItem == SelectedItem)
                {
                    //textRect.Y -= 2;
                    g.DrawString(currentItem.Title, currentFont, new SolidBrush(currentItem.ForeColor), textRect, sf); //Use ForeColor property of page (you may not want to do this, or you may want to make a different property.
                }
                else
                {
                  g.DrawString(currentItem.Title, currentFont, new SolidBrush(currentItem.ForeColor), textRect, sf);
                }
            }
 
            #endregion
 
            #region Draw Right-To-Left Tab
 
            currentItem.IsDrawn = true;
        }

Finally I updated OnCalcTabPage method to make the tab a couple pixels longer:

private void OnCalcTabPage(Graphics g, FATabStripItem currentItem)
        {
            Font currentFont = Font;
            if (currentItem == SelectedItem)
                currentFont = new Font(Font, FontStyle.Bold);
 
            SizeF textSize = g.MeasureString(currentItem.Title, currentFont, new SizeF(200, 10), sf);
            textSize.Width += 23; //Added 3 pixels

            if (RightToLeft == RightToLeft.No)
            {
                RectangleF buttonRect = new RectangleF(DEF_START_POS, 3, textSize.Width, 17);
                currentItem.StripRect = buttonRect;
                DEF_START_POS += (int) textSize.Width;
            }
            else
            {
                RectangleF buttonRect = new RectangleF(DEF_START_POS - textSize.Width + 1, 3, textSize.Width - 1, 17);
                currentItem.StripRect = buttonRect;
                DEF_START_POS -= (int) textSize.Width;
            }
        }

Increase width and height of Tabstripitem's content area

huynhdangthai

23:32 16 Jun '11

Hi guys. Thank Hadi Eskandari for your works is greate. I have a question is How can i increase with and height of content area where Tabstripitem hosted controls?.
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My vote of 5

Omar Shraim

10:21 19 Apr '11

Great control specially for someone looking for RTL support. Missing support for mnemonic to activate tab page by keyboard shortcut key
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Close tab on middle button click

cd__ward

1:27 11 Mar '11

Maybe this change can be useful to anyone Smile | :)

In only changes OnMouseDown as follows:

        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);
 
            if (e.Button == MouseButtons.Middle)
            {
                TabPageVisualStudio item = GetTabItemByPoint(e.Location);
                if (item != null)
                {
                    CloseTab(item);
                }
                return;
            }
            if (e.Button != MouseButtons.Left)
                return;
 
            HitTestResult result = HitTest(e.Location);
            if (result == HitTestResult.MenuGlyph)
            {
                HandledEventArgs args = new HandledEventArgs(false);
                OnMenuItemsLoading(args);
 
                if (!args.Handled)
                    OnMenuItemsLoad(EventArgs.Empty);
 
                ShowMenu();
            }
            else if (result == HitTestResult.CloseButton)
            {
                if (SelectedItem != null)
                {
                    CloseTab(SelectedItem);
                }
            }
            else if (result == HitTestResult.TabItem)
            {
                TabPageVisualStudio item = GetTabItemByPoint(e.Location);
                if (item != null)
                {
                    SelectedItem = item;
                }
            }
 
            Invalidate();
        }

... again, good work!

Mouse enters tab strip [modified]

cd__ward

1:08 11 Mar '11

Hello,

Is there any way to detect when the mouse enters a strip. This could be useful to, for example, activate a tab when dragging items from any other tab.

By now, I added a new event:

public event Action<TabPageVisualStudio, MouseEventArgs> OnMouseOverTabStrip;

... and modified OnMouseMove as follows:

protected override void OnMouseMove(MouseEventArgs e)
        {
            base.OnMouseMove(e);
 
            if (menuGlyph.Bounds.Contains(e.Location))
            {
                menuGlyph.IsMouseOver = true;
                Invalidate(menuGlyph.Bounds);
            }
            else
            {
                if (menuGlyph.IsMouseOver && !menuOpen)
                {
                    menuGlyph.IsMouseOver = false;
                    Invalidate(menuGlyph.Bounds);
                }
            }
 
            if (closeButton.Bounds.Contains(e.Location))
            {
                closeButton.IsMouseOver = true;
                Invalidate(closeButton.Bounds);
            }
            else
            {
                if (closeButton.IsMouseOver)
                {
                    closeButton.IsMouseOver = false;
                    Invalidate(closeButton.Bounds);
                }
            }
 
            // Modified to obtain tab strip
            var tab = GetTabItemByPoint(e.Location);
            if (tab != null)
            {
                if (OnMouseOverTabStrip != null) OnMouseOverTabStrip(tab, e);
            }
        }

It works for me, but I'm not an expert creating user controls, so I don't know if it is elegant.

Thank you and very very good work ! Smile | :)

modified on Friday, March 11, 2011 7:15 AM

Scrollable panel...

nathanieldamned

5:54 3 Feb '11

aghrr... Control is great, but AutoScroll in tabstripitem doesn't work...
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My vote of 5

alifellod

10:10 4 Nov '10

thanks
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Problem with Datagridview

i3dmax.com

15:14 2 May '10

I encountered an error for TabStrip. When I add a controlDataGridView on form1, after running form and return to form but the tabPages been deleted
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Just what hat I had been looking for.

Diamonddrake

18:06 13 Apr '10

I recently started from scratch on a tab control just because I wanted that close button and drop down list. But this tab control is almost perfect. even though it mimics VS's tabs almost perfectly. I think I will modify it to support Tab Icons. I really like tab icons, and I am disappointed that VS lacks them. Thanks for this
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Thanks!

alatyami

17:47 15 Feb '10

I just wanted to say thanks for this great control set! This is exactly what I was looking for and it is easy to use. It is amazing that Microsoft hasn't added support for this into SDK. FYI, works great with VS2010.
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How can I get the close button per TabStripItem

amit_vasu

21:13 28 Oct '09

Hi, How can I get a close button with event per FATabStripItem, right side of TitleText like IE8 tabs ?
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Right-Border offset of selected tab (when over another) needs correction

Member 3610841

1:45 3 Aug '09

If you notice, you need to change `path.AddLine(buttonRect.Right, mtop + 2, buttonRect.Right, buttonRect.Bottom - 1);` to `path.AddLine(buttonRect.Right - 1, mtop + 2, buttonRect.Right, buttonRect.Bottom - 1);` You'll notice at the RIGHT-line of the SELECTED TAB while it is "over" another tab. Any VB.Net Implimentations? ;_;
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How can I move the tab bar to the bottom of the control?

coby cai

16:43 30 May '09

Excellent job. Could you please tell me how I can move the tab bar to the bottom of the control? Or, is it possible to dock it to any side of the screen? Thanks, coby
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Vb.net translation

The Lord of The Rings

13:09 31 Jan '09

It's possible to have it in vb.net... it would be very useful for me... i tried to do it in vb.net but i didn't manage to make it work... can you help me? thx
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Problem with FlowLayoutPanel and nested controls

KyronSr

11:15 19 Jun '08

I was attempting to use this control nested inside of other controls [I end up with a few split containers, and a couple of these things nested a few layers deep]. Once I threw a FlowLayoutPanel into the mix AND tried to have the FlowLayoutPanel resize its contained controls, I noticed that it would not resize the contained controls.

One way that I found to solve this was to add the following to FATabStrip.cs:

        protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified)
        {
 
            foreach (Control item in this.Controls)
            {
                FATabStripItem tabItem = item as FATabStripItem;
                tabItem.SuspendLayout();
            }
            base.SetBoundsCore(x, y, width, height, specified);
 

            foreach (Control item in this.Controls)
            {
                FATabStripItem tabItem = item as FATabStripItem;
                tabItem.ResumeLayout();
            }
        }

Re: Problem with FlowLayoutPanel and nested controls

KyronSr

13:49 23 Sep '08

Actually, even with the code above I still had the same problem when things got further nested [my most deeply nested item was quite a few layers deep in the control hierarchy] because I started making heavy use of OO for my base controls, etc.

The following piece of code in FATabStrip solved my problem and doesn't seem to slow it down:

protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified)
{
Suspend(this);
base.SetBoundsCore(x, y, width, height, specified);
Resume(this);
}

private void Suspend(Control item)
{
item.SuspendLayout();
foreach (Control innerItem in item.Controls)
{
Suspend(innerItem);
}
}
private void Resume(Control item)
{
item.ResumeLayout();
foreach (Control innerItem in item.Controls)
{
Resume(innerItem);
}
}

Maybe this will help anybody else that ends up with controls which do not resize/repaint themselves correctly when using this control [and others that are similar to this control].

Good, ...

zolfaghari

2:03 28 Apr '08

Hadi jan Damet garm agha
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Scrollable Panel?

micheals

23:20 19 Apr '08

I notice that the TabStripItem is not scrollable. I set the AutoScroll property to true, but the scrollbar does not appear even the control is larger than the visible area. Anyone idea ?
Sign In·View Thread·Permalink	4.25/5 (4 votes)