/// <summary>
/// Select the given tab.
/// </summary>
/// <param name="tab">Tab to select.</param>
private void SelectTab(WhidbeyTabPage tab)
{
// Ignore if disabled
if ((tab.State == TabState.Disabled) ||
(tab.Enabled == false))
{
return;
}
// Unselect previous
UnselectTab();
Unhover();
// Set selected
tab.State = TabState.Selected;
m_oSelected = tab;
// Add new control to panel
tab.ShowNotifty(true);
tab.Visible = true;
tab.Focus();
// Force redraw
this.Invalidate(tab.ItemBounds);
// Fire event
EventHandler <WhidbeyTabEventArgs> ev = this.m_eSelected;
if (ev != null)
{
ev(this, new WhidbeyTabEventArgs(tab));
}
}
/// <summary>
/// Fired when a component is removed.
/// </summary>
/// <param name="sender">Ignored.</param>
/// <param name="e">Information about component.</param>
private void OnComponentRemoving(object sender, ComponentEventArgs e)
{
IDesignerHost host = this.GetService(typeof(IDesignerHost)) as IDesignerHost;
if (e.Component is WhidbeyTabControl)
{
while (m_oControl.TabPages.Count > 0)
{
m_oChangeSvc.OnComponentChanging(m_oControl, null);
WhidbeyTabPage tab = m_oControl.TabPages[0];
m_oControl.TabPages.RemoveAt(0);
host.DestroyComponent(tab);
m_oChangeSvc.OnComponentChanged(m_oControl, null, null, null);
}
}
else if (e.Component is WhidbeyTabPage)
{
WhidbeyTabPage tab = e.Component as WhidbeyTabPage;
if (m_oControl.TabPages.Contains(tab) == true)
{
m_oChangeSvc.OnComponentChanging(m_oControl, null);
m_oControl.TabPages.Remove(tab);
m_oChangeSvc.OnComponentChanged(m_oControl, null, null, null);
}
}
}
/// <summary>
/// Remove the given tab from the control.
/// </summary>
/// <param name="control">Tab to remove.</param>
internal void RemoveTab(WhidbeyTabPage tab)
{
// Validate
if ((tab == null) ||
(tab == null))
{
return;
}
// Remove label/from panel
this.Controls.Remove(tab.Label);
this.panelContainer.Controls.Remove(tab);
}
/// <summary>
/// Unhover the currently hovered tab.
/// </summary>
private void Unhover()
{
if (m_oHovered != null)
{
WhidbeyTabPage tab = m_oHovered;
m_oHovered = null;
tab.State = TabState.Normal;
// Force redraw
this.Invalidate(tab.ItemBounds);
}
}
/// <summary>
/// Select the currently selected tab.
/// </summary>
private void UnselectTab()
{
if (m_oSelected != null)
{
WhidbeyTabPage tab = m_oSelected;
m_oSelected = null;
tab.State = TabState.Normal;
// Drop old control from the panel
tab.ShowNotifty(false);
tab.Visible = false;
// Force redraw
this.Invalidate(tab.ItemBounds);
}
}
/// <summary>
/// Called whenever enable state changes on a tab.
/// </summary>
/// <param name="tab">Tab to inspect.</param>
internal void SetTabEnabled(WhidbeyTabPage tab)
{
if (tab.Enabled == false)
{
// -- Tab is being disabled --
// If it's selected, deselect
if (tab == m_oSelected)
{
// Find another tab
bool subFound = false;
foreach (WhidbeyTabPage page in m_aControls)
{
if ((page != tab) &&
(page.Enabled == true))
{
SelectTab(page);
subFound = true;
break;
}
}
// Check to make sure a substitute was found
if (subFound == false)
{
throw new InvalidOperationException("No valid page was found to replace disabled page; cannot disable the only page.");
}
}
// Set stuff
tab.Label.ForeColor = Color.Gray;
tab.State = TabState.Disabled;
}
else
{
// -- Tab is being enabled --
// Set stuff
tab.Label.ForeColor = Color.Black;
tab.State = TabState.Normal;
}
// Force redraw
this.Invalidate(tab.ItemBounds);
}
/// <summary>
/// Add a new tab and set selection.
/// </summary>
/// <param name="sender">Ignored.</param>
/// <param name="e">Ignored.</param>
private void OnAddTab(object sender, EventArgs e)
{
// Begin transaction
IDesignerHost host = this.GetService(typeof(IDesignerHost)) as IDesignerHost;
DesignerTransaction transaction = host.CreateTransaction("Add tab");
// Create new tab
WhidbeyTabPage tab = host.CreateComponent(typeof(WhidbeyTabPage)) as WhidbeyTabPage;
m_oChangeSvc.OnComponentChanging(m_oControl, null);
m_oControl.TabPages.Add(tab);
m_oChangeSvc.OnComponentChanged(m_oControl, null, null, null);
// End transaction
transaction.Commit();
m_oControl.SelectedTab = tab;
}
/// <summary>
/// Hover the given tab.
/// </summary>
/// <param name="tab">Tab to hover.</param>
private void Hover(WhidbeyTabPage tab)
{
// Ignore if disabled
if ((tab.State == TabState.Disabled) ||
(tab.Enabled == false))
{
return;
}
if (tab.State != TabState.Selected)
{
tab.State = TabState.Hovered;
}
m_oHovered = tab;
// Force redraw
this.Invalidate(tab.ItemBounds);
}
/// <summary>
/// Insert the given tab into the control.
/// </summary>
/// <param name="control">Tab to add.</param>
internal void InsertTab(WhidbeyTabPage tab)
{
// Create label for tab
Label label = new Label();
label.Text = tab.Text;
label.TextAlign = ContentAlignment.MiddleLeft;
label.BackColor = Color.Transparent;
if (tab.State == TabState.Disabled)
{
label.ForeColor = Color.Gray;
}
else
{
label.ForeColor = Color.Black;
}
label.Left = 12;
label.MouseMove += new MouseEventHandler(Label_MouseMove);
label.MouseLeave += new EventHandler(Label_MouseLeave);
label.MouseUp += new MouseEventHandler(Label_MouseUp);
this.Controls.Add(label);
tab.Label = label;
// Add tab control to container
this.panelContainer.Controls.Add(tab);
tab.Dock = DockStyle.Fill;
tab.Visible = false;
// Rebuild the tab bounds
this.RebuildTabs();
// Invalidate everything (a lot can change)
this.Invalidate();
// Always set the first to selected
if (this.m_aControls.IndexOf(tab) == 0)
{
SelectTab(tab);
}
}
/// <summary>
/// Rebuild tab bounding rectangles.
/// </summary>
private void RebuildTabs()
{
// Basic setup of bounds
m_nBounds.X = 0;
m_nBounds.Y = 6;
m_nBounds.Width = 107;
m_nBounds.Height = 0;
// Start tabs
for (int n = 0; n < m_aControls.Count; n++)
{
WhidbeyTabPage tab = m_aControls[n];
tab.ItemBounds = new Rectangle(m_nBounds.X, m_nBounds.Bottom, m_nBounds.Width + 1, 33);
tab.Label.Top = tab.ItemBounds.Top;
tab.Label.Width = tab.ItemBounds.Width - 12;
tab.Label.Height = tab.ItemBounds.Height;
m_nBounds.Height += 33;
}
m_nBounds.Height += 6;
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="tab">Tab this event is about.</param>
internal WhidbeyTabEventArgs(WhidbeyTabPage tab)
{
m_oTab = tab;
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="tab">Tab this event is about.</param>
internal WhidbeyTabEventArgs(WhidbeyTabPage tab)
{
m_oTab = tab;
}
/// <summary>
/// Paint the given tab to the given graphics context.
/// </summary>
/// <param name="g">Destination graphics context.</param>
/// <param name="tab">Tab to paint.</param>
private void PaintTab(Graphics g, WhidbeyTabPage tab)
{
int borderWidth; // Only used with Selected and Hovered
// Hide the label if there is an icon
tab.Label.Visible = (tab.Image == null);
if (tab.State == TabState.Selected)
{
// Fill background white
g.FillRectangle(Brushes.White, 3, tab.ItemBounds.Top + 1, 104, tab.ItemBounds.Height - 2);
// Draw right border
using (Pen p_selectedBorder = new Pen(Color.FromArgb(173, 190, 204), 1.0f))
g.DrawLine(p_selectedBorder, tab.ItemBounds.Right - 1, tab.ItemBounds.Top + 1, tab.ItemBounds.Right - 1, tab.ItemBounds.Bottom - 1);
// We are selected, so width goes full
borderWidth = 107;
}
else
{
// Hovered, so width goes one short
borderWidth = 106;
}
if ((tab.State == TabState.Hovered) ||
(tab.State == TabState.Selected))
{
// -- Draw fancy border --
// Top
g.DrawLine(p_darkBorderPen, 3, tab.ItemBounds.Top, borderWidth, tab.ItemBounds.Top);
// Bottom
g.DrawLine(p_darkBorderPen, 3, tab.ItemBounds.Bottom - 1, borderWidth, tab.ItemBounds.Bottom - 1);
// -- Draw left side orange element --
// Inside
g.DrawRectangle(p_orangeInner, 1, tab.ItemBounds.Top + 1, 1, tab.ItemBounds.Height - 3);
// Border
g.DrawLines(p_orangeOuter, new Point[] {
new Point(2, tab.ItemBounds.Top),
new Point(0, tab.ItemBounds.Top + 2),
new Point(0, tab.ItemBounds.Bottom - 3),
new Point(2, tab.ItemBounds.Bottom - 1)
});
}
else
{
// Top line
g.DrawLine(p_itemBottom, 6, tab.ItemBounds.Top, 101, tab.ItemBounds.Top);
// Bottom line
g.DrawLine(Pens.White, 6, tab.ItemBounds.Bottom - 1, 101, tab.ItemBounds.Bottom - 1);
}
if (tab.Image != null)
{
Rectangle rect = tab.ItemBounds;
int centerX = rect.X + (rect.Width / 2);
int centerY = rect.Y + (rect.Height / 2);
centerX -= (tab.Image.Width / 2);
centerY -= (tab.Image.Height / 2);
g.DrawImageUnscaled(tab.Image, centerX, centerY);
}
}
