protected override void AddAccessibleControlsToList(ArrayList list)
{
for (int i = 0; i < TabCount; i++)
{
TabEntry tabEntry = (TabEntry)tabEntryList[i];
list.Add(tabEntry.TabSelectorLightweightControl);
}
base.AddAccessibleControlsToList(list);
}
/// <summary>
/// Initializes a new instance of the TabSelectorLightweightControl class.
/// </summary>
public TabSelectorLightweightControl(TabEntry tabEntry)
{
/// <summary>
/// Required for Windows.Forms Class Composition Designer support
/// </summary>
InitializeComponent();
// Set the tab entry.
this.tabEntry = tabEntry;
// Initialize the object.
InitializeObject();
}
private void DecrementTab()
{
int currentIndex = SelectedTabNumber - 1;
if (currentIndex < 0)
{
currentIndex = tabEntryList.Count - 1;
}
TabEntry tabEntry = (TabEntry)tabEntryList[currentIndex];
if (tabEntry != null)
{
SelectedTabEntry = tabEntry;
}
}
private void IncrementTab()
{
int currentIndex = SelectedTabNumber + 1;
if (currentIndex >= tabEntryList.Count)
{
currentIndex = 0;
}
TabEntry tabEntry = (TabEntry)tabEntryList[currentIndex];
if (tabEntry != null)
{
SelectedTabEntry = tabEntry;
}
}
/// <summary>
/// Helper to remove a tab entry.
/// </summary>
/// <param name="tabNumber">The tab number of the tab entry to remove.</param>
private void RemoveTabEntry(int tabNumber)
{
// Locate the tab entry for the specified tab number. It it's found, remove it.
TabEntry tabEntry = (TabEntry)tabEntryList[tabNumber];
if (tabEntry != null)
{
if (SelectedTabEntry == tabEntry)
{
SelectedTabEntry = FirstTabEntry;
}
tabPageContainerControl.Controls.Remove(tabEntry.TabPageControl);
LightweightControls.Remove(tabEntry.TabSelectorLightweightControl);
tabEntryList.Remove(tabNumber);
}
}
/// <summary>
/// Sets a tab control.
/// </summary>
/// <param name="index">The tab index to set.</param>
/// <param name="tabPageControl">The tab page control to set.</param>
public void SetTab(int tabNumber, TabPageControl tabPageControl)
{
// If there already is a tab entry for the specified tab number, remove it.
RemoveTabEntry(tabNumber);
// Instantiate the new tab entry.
TabEntry tabEntry = new TabEntry(this, tabPageControl);
tabEntryList.Add(tabNumber, tabEntry);
tabPageContainerControl.Controls.Add(tabEntry.TabPageControl);
LightweightControls.Add(tabEntry.TabSelectorLightweightControl);
tabEntry.TabSelectorLightweightControl.DragInside += new DragEventHandler(TabSelectorLightweightControl_DragInside);
tabEntry.TabSelectorLightweightControl.DragOver += new DragEventHandler(TabSelectorLightweightControl_DragOver);
tabEntry.TabSelectorLightweightControl.Selected += new EventHandler(TabSelectorLightweightControl_Selected);
tabEntry.TabPageControl.VisibleChanged += new EventHandler(TabPageControl_VisibleChanged);
// Layout and invalidate.
PerformLayout();
Invalidate();
}
/// <summary>
/// Sets a tab control.
/// </summary>
/// <param name="index">The tab index to set.</param>
/// <param name="tabPageControl">The tab page control to set.</param>
public void SetTab(int tabNumber, TabPageControl tabPageControl)
{
// If there already is a tab entry for the specified tab number, remove it.
RemoveTabEntry(tabNumber);
// Instantiate the new tab entry.
TabEntry tabEntry = new TabEntry(this, tabPageControl);
tabEntryList.Add(tabNumber, tabEntry);
tabPageContainerControl.Controls.Add(tabEntry.TabPageControl);
LightweightControls.Add(tabEntry.TabSelectorLightweightControl);
tabEntry.TabSelectorLightweightControl.DragInside += new DragEventHandler(TabSelectorLightweightControl_DragInside);
tabEntry.TabSelectorLightweightControl.DragOver += new DragEventHandler(TabSelectorLightweightControl_DragOver);
tabEntry.TabSelectorLightweightControl.Selected += new EventHandler(TabSelectorLightweightControl_Selected);
tabEntry.TabPageControl.VisibleChanged += new EventHandler(TabPageControl_VisibleChanged);
// Layout and invalidate.
PerformLayout();
Invalidate();
}
/// <summary>
/// Raises the Layout event. The mother of all layout processing.
/// </summary>
/// <param name="e">An EventArgs that contains the event data.</param>
protected override void OnLayout(EventArgs e)
{
// Call the base class's method so registered delegates receive the event.
base.OnLayout(e);
// No layout required if this control is not visible.
if (Parent == null)
{
return;
}
// If there are not tabs, layout processing is simple.
if (tabEntryList.Count == 0)
{
HideTabScrollerInterface();
tabSelectorAreaSize = new Size(0, 1);
return;
}
// Pre-process the layout of tab selectors.
int width = (TAB_INSET * 2) + (PAD * 4) + (PAD * (tabEntryList.Count - 1)), height = 0;
foreach (TabEntry tabEntry in tabEntryList.Values)
{
if (!tabEntry.Hidden)
{
// Reset the tab selector and have it perform its layout logic so that it is at
// its natural size.
tabEntry.TabSelectorLightweightControl.SmallTabs = SmallTabs;
tabEntry.TabSelectorLightweightControl.ShowTabBitmap = true;
tabEntry.TabSelectorLightweightControl.ShowTabText = true;
tabEntry.TabSelectorLightweightControl.PerformLayout();
// If this tab selector is the tallest one we've seen, it sets a new high-
// water mark.
if (tabEntry.TabSelectorLightweightControl.UnselectedVirtualSize.Height > height)
{
height = tabEntry.TabSelectorLightweightControl.UnselectedVirtualSize.Height;
}
// Adjust the width to account for this tab selector.
width += tabEntry.TabSelectorLightweightControl.UnselectedVirtualSize.Width;
// Push the tabs closer together
width -= 6;
}
}
width += 6;
// Pad height.
height += PAD;
// If the tab selection area is scrollable, enable/disable the scroller interface.
if (scrollableTabSelectorArea)
{
// Set the tab selector area size.
tabSelectorAreaSize = new Size(width, height);
// If the entire tab selector area is visible, hide the tab scroller interface.
if (width <= VirtualWidth)
{
HideTabScrollerInterface();
}
else
{
// If the tab scroller position is zero, the left tab scroller button is not
// shown.
if (tabScrollerPosition == 0)
{
tabScrollerButtonLightweightControlLeft.Visible = false;
}
else
{
// Layout the left tab scroller button.
tabScrollerButtonLightweightControlLeft.VirtualBounds = new Rectangle(0,
0,
tabScrollerButtonLightweightControlLeft.DefaultVirtualSize.Width,
tabSelectorAreaSize.Height);
tabScrollerButtonLightweightControlLeft.Visible = true;
tabScrollerButtonLightweightControlLeft.BringToFront();
}
// Layout the right tab scroller button.
if (tabScrollerPosition == MaximumTabScrollerPosition)
{
tabScrollerButtonLightweightControlRight.Visible = false;
}
else
{
int rightScrollerButtonWidth = tabScrollerButtonLightweightControlRight.DefaultVirtualSize.Width;
tabScrollerButtonLightweightControlRight.VirtualBounds = new Rectangle(TabAreaRectangle.Right - rightScrollerButtonWidth,
0,
rightScrollerButtonWidth,
tabSelectorAreaSize.Height);
tabScrollerButtonLightweightControlRight.Visible = true;
tabScrollerButtonLightweightControlRight.BringToFront();
}
}
}
else
{
// Hide the tab scroller interface.
HideTabScrollerInterface();
if (!allowTabClipping)
{
// If the entire tab selector area is not visible, switch into "no bitmap" mode.
if (width > VirtualWidth)
{
// Reset the width.
width = (TAB_INSET * 2) + (PAD * 4) + (PAD * (tabEntryList.Count - 1));
// Re-process the layout of tab selectors.
foreach (TabEntry tabEntry in tabEntryList.Values)
{
if (!tabEntry.Hidden)
{
// Hide tab bitmap.
tabEntry.TabSelectorLightweightControl.ShowTabBitmap = false;
tabEntry.TabSelectorLightweightControl.ShowTabText = true;
tabEntry.TabSelectorLightweightControl.PerformLayout();
// Adjust the width to account for this tab selector.
width += tabEntry.TabSelectorLightweightControl.UnselectedVirtualSize.Width;
}
}
}
// If the entire tab selector area is not visible, switch into "no text except selected" mode.
if (width > VirtualWidth)
{
// Reset the width.
width = (TAB_INSET * 2) + (PAD * 4) + (PAD * (tabEntryList.Count - 1));
// Re-process the layout of tab selectors.
foreach (TabEntry tabEntry in tabEntryList.Values)
{
if (!tabEntry.Hidden)
{
// Hide tab text.
tabEntry.TabSelectorLightweightControl.ShowTabBitmap = true;
tabEntry.TabSelectorLightweightControl.ShowTabText = tabEntry.IsSelected;
tabEntry.TabSelectorLightweightControl.PerformLayout();
// Adjust the width to account for this tab selector.
width += tabEntry.TabSelectorLightweightControl.UnselectedVirtualSize.Width;
}
}
}
// If the entire tab selector area is not visible, switch into "no text" mode.
if (width > VirtualWidth)
{
// Reset the width.
width = (TAB_INSET * 2) + (PAD * 4) + (PAD * (tabEntryList.Count - 1));
// Re-process the layout of tab selectors.
foreach (TabEntry tabEntry in tabEntryList.Values)
{
if (!tabEntry.Hidden)
{
// Hide tab text.
tabEntry.TabSelectorLightweightControl.ShowTabBitmap = true;
tabEntry.TabSelectorLightweightControl.ShowTabText = false;
tabEntry.TabSelectorLightweightControl.PerformLayout();
// Adjust the width to account for this tab selector.
width += tabEntry.TabSelectorLightweightControl.UnselectedVirtualSize.Width;
}
}
}
// If the entire tab selector area is not visible, hide it.
if (width > VirtualWidth)
{
// Reset the width.
width = (TAB_INSET * 2) + (PAD * 4) + (PAD * (tabEntryList.Count - 1));
// Re-process the layout of tab selectors.
foreach (TabEntry tabEntry in tabEntryList.Values)
{
if (!tabEntry.Hidden)
{
// Hide tab text.
tabEntry.TabSelectorLightweightControl.ShowTabBitmap = false;
tabEntry.TabSelectorLightweightControl.PerformLayout();
// Adjust the width to account for this tab selector.
width += tabEntry.TabSelectorLightweightControl.UnselectedVirtualSize.Width;
}
}
if (width > VirtualWidth)
{
height = 1;
}
}
}
// Set the tab selector layout size.
tabSelectorAreaSize = new Size(width, height);
}
// Finally, actually layout the tab entries.
int x = TAB_INSET + (PAD * 2);
TabEntry previousTabEntry = null;
foreach (TabEntry tabEntry in tabEntryList.Values)
{
if (!tabEntry.Hidden)
{
// Adjust the x offset for proper positioning of this tab and set the y offset,
// too. Now we know WHERE the tab will be laid out in the tab area.
if (previousTabEntry != null)
{
x += previousTabEntry.IsSelected ? -PAD + 1 : -1;
}
int y = Math.Max(0, tabSelectorAreaSize.Height - tabEntry.TabSelectorLightweightControl.VirtualBounds.Height);
// Latout the tab entry.
tabEntry.TabSelectorLightweightControl.VirtualLocation = new Point(x - tabScrollerPosition, y);
// Adjust the x offset to account for the tab entry.
x += tabEntry.TabSelectorLightweightControl.VirtualBounds.Width;
// Set the previous tab entry for the next loop iteration.
previousTabEntry = tabEntry;
}
}
// Set the bounds of the tab page control.
Rectangle tabPageControlBounds = VirtualClientRectangleToParent(TabPageRectangle);
if (tabPageContainerControl.Bounds != tabPageControlBounds)
{
tabPageContainerControl.Bounds = tabPageControlBounds;
}
// Make sure the selected tab entry and its TabPageControl are visible and at the top
// of the Z order and that, if there is one, the previously selected tab entry's
// TabPageControl is not visible.
if (SelectedTabEntry != null)
{
SelectedTabEntry.TabSelectorLightweightControl.BringToFront();
SelectedTabEntry.TabPageControl.BringToFront();
}
RtlLayoutFixup(true);
}
/// <summary>
/// Initializes a new instance of the TabSelectorLightweightControl class.
/// </summary>
public TabSelectorLightweightControl(TabEntry tabEntry)
{
/// <summary>
/// Required for Windows.Forms Class Composition Designer support
/// </summary>
InitializeComponent();
// Set the tab entry.
this.tabEntry = tabEntry;
// Initialize the object.
InitializeObject();
}
