/// <summary>
/// Raises the DropDown event.
/// </summary>
/// <param name="e">An ContextPositionMenuArgs containing the event data.</param>
protected virtual void OnDropDown(ContextPositionMenuArgs e)
{
if (DropDown != null)
{
DropDown(this, e);
}
}
/// <summary>
/// Raises the OverflowDropDown event.
/// </summary>
/// <param name="e">An ContextPositionMenuArgs containing the event data.</param>
internal protected virtual void OnOverflowDropDown(ContextPositionMenuArgs e)
{
if (OverflowDropDown != null)
{
OverflowDropDown(this, e);
}
}
private bool ShowDropDown()
{
bool showingContextMenu = false;
// Update the krypton menu with this controls palette state
if (KryptonContextMenu != null)
{
if (PaletteMode != PaletteMode.Custom)
{
KryptonContextMenu.PaletteMode = PaletteMode;
}
else
{
KryptonContextMenu.Palette = Palette;
}
}
// Package up the context menu and positioning values we will use later
ContextPositionMenuArgs cpma = new ContextPositionMenuArgs(ContextMenuStrip,
KryptonContextMenu,
GetPositionH(),
GetPositionV());
// Let use examine and later values
OnDropDown(cpma);
// If we still want to show a context menu
if (!cpma.Cancel)
{
if (cpma.KryptonContextMenu != null)
{
// Convert the client rect to screen coords
Rectangle screenRect = RectangleToScreen(ClientRectangle);
if (CommonHelper.ValidKryptonContextMenu(cpma.KryptonContextMenu))
{
// Modify the screen rect so that we have a pixel gap between button and menu
switch (cpma.PositionV)
{
case KryptonContextMenuPositionV.Above:
screenRect.Y -= 1;
break;
case KryptonContextMenuPositionV.Below:
screenRect.Height += 1;
break;
}
switch (cpma.PositionH)
{
case KryptonContextMenuPositionH.Before:
screenRect.X -= 1;
break;
case KryptonContextMenuPositionH.After:
screenRect.Width += 1;
break;
}
// We are showing a drop down
showingContextMenu = true;
// Show relative to the screen rectangle
cpma.KryptonContextMenu.Closed += new ToolStripDropDownClosedEventHandler(OnKryptonContextMenuClosed);
cpma.KryptonContextMenu.Show(this, screenRect, cpma.PositionH, cpma.PositionV);
}
}
else if (cpma.ContextMenuStrip != null)
{
// Convert the client rect to screen coords
Rectangle screenRect = RectangleToScreen(ClientRectangle);
if (CommonHelper.ValidContextMenuStrip(cpma.ContextMenuStrip))
{
// We are showing a drop down
showingContextMenu = true;
//...show the context menu below and at th left of the button
VisualPopupManager.Singleton.ShowContextMenuStrip(cpma.ContextMenuStrip,
new Point(screenRect.X, screenRect.Bottom + 1),
new EventHandler(OnContextMenuClosed));
}
}
}
return(showingContextMenu);
}
private void OnOverflowButtonClick(object sender, MouseEventArgs e)
{
// Only allow a single context menu at a time
if (!_showingContextMenu)
{
// Get access to the controller, view and crumb item
ViewDrawButton viewButton = sender as ViewDrawButton;
ButtonController controller = viewButton.MouseController as ButtonController;
// Create a context menu with a items collection
KryptonContextMenu kcm = new KryptonContextMenu();
// Use same palette settings for context menu as the main control
kcm.Palette = _kryptonBreadCrumb.Palette;
if (kcm.Palette == null)
{
kcm.PaletteMode = _kryptonBreadCrumb.PaletteMode;
}
// Add an items collection as the root item of the context menu
KryptonContextMenuItems items = new KryptonContextMenuItems();
kcm.Items.Add(items);
// Store lookup between each menu item and the crumb it represents. Prevents
// needing to use the menu item tag for remembering association. Leaving the
// tag free for use by the user.
_menuItemToCrumb = new MenuItemToCrumb();
// Create a new menu item to represent each of the invisible crumbs not children of the root
// (item 0=overflow button, 1=root; 2=child of root, so we start at index 3)
for (int i = 3; i < Count; i++)
{
if (!this[i].Visible)
{
KryptonBreadCrumbItem childCrumb = _buttonToCrumb[(ViewDrawButton)this[i]];
KryptonContextMenuItem childMenu = new KryptonContextMenuItem();
// Store 1-to-1 association
_menuItemToCrumb.Add(childMenu, childCrumb);
// Copy across the display details of the child crumb item
childMenu.Text = childCrumb.ShortText;
childMenu.ExtraText = childCrumb.LongText;
childMenu.Image = childCrumb.Image;
childMenu.ImageTransparentColor = childCrumb.ImageTransparentColor;
childMenu.Click += new EventHandler(OnChildCrumbClick);
items.Items.Add(childMenu);
}
}
// Create a new menu item to represent each of the roots children
bool firstRoot = true;
foreach (KryptonBreadCrumbItem childCrumb in _kryptonBreadCrumb.RootItem.Items)
{
// The first time we add an entry
if (firstRoot)
{
// Add a separator if entries already exist
if (items.Items.Count > 0)
{
items.Items.Add(new KryptonContextMenuSeparator());
}
firstRoot = false;
}
KryptonContextMenuItem childMenu = new KryptonContextMenuItem();
// Store 1-to-1 association
_menuItemToCrumb.Add(childMenu, childCrumb);
// Copy across the display details of the child crumb item
childMenu.Text = childCrumb.ShortText;
childMenu.ExtraText = childCrumb.LongText;
childMenu.Image = childCrumb.Image;
childMenu.ImageTransparentColor = childCrumb.ImageTransparentColor;
childMenu.Click += new EventHandler(OnChildCrumbClick);
items.Items.Add(childMenu);
}
// Allow the user a chance to alter the menu contents or cancel it entirely
ContextPositionMenuArgs cpma = new ContextPositionMenuArgs(kcm, KryptonContextMenuPositionH.Left, KryptonContextMenuPositionV.Below);
_kryptonBreadCrumb.OnOverflowDropDown(cpma);
// Is there still the need to show a menu that is not empty?
if (!cpma.Cancel &&
(cpma.KryptonContextMenu != null) &&
CommonHelper.ValidKryptonContextMenu(cpma.KryptonContextMenu))
{
// Cache the controller for use in menu close processing, prevents the need to
// store anything in the KryptonContextMenu tag and so free up its use to the user.
_pressedButtonController = controller;
// Show the context menu so user can select the next item for selection
cpma.KryptonContextMenu.Closed += new ToolStripDropDownClosedEventHandler(OnKryptonContextMenuClosed);
cpma.KryptonContextMenu.Show(_kryptonBreadCrumb, _kryptonBreadCrumb.RectangleToScreen(new Rectangle(viewButton.ClientRectangle.X,
viewButton.ClientRectangle.Y,
viewButton.ClientRectangle.Width * 2,
viewButton.ClientRectangle.Height)),
cpma.PositionH,
cpma.PositionV);
// do not show another context menu whilst this one is visible
_showingContextMenu = true;
}
else
{
// Button gives a fixed appearance when pressed, without a context menu that is not necessary
controller.RemoveFixed();
// Clicking item makes it become the selected crumb
_kryptonBreadCrumb.SelectedItem = _kryptonBreadCrumb.RootItem;
}
}
}