private void OnButtonClick(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;
KryptonBreadCrumbItem breadCrumb = controller.Tag as KryptonBreadCrumbItem;
// Do we need to show a drop down menu?
if (viewButton.DropDown && viewButton.SplitRectangle.Contains(e.Location))
{
// Create a context menu with a items collection
KryptonContextMenu kcm = new KryptonContextMenu
{
// Use same palette settings for context menu as the main control
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 child crumb
foreach (KryptonBreadCrumbItem childCrumb in breadCrumb.Items)
{
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 += OnChildCrumbClick;
items.Items.Add(childMenu);
}
// Allow the user a chance to alter the menu contents or cancel it entirely
BreadCrumbMenuArgs bcma = new BreadCrumbMenuArgs(breadCrumb, kcm, KryptonContextMenuPositionH.Left, KryptonContextMenuPositionV.Below);
_kryptonBreadCrumb.OnCrumbDropDown(bcma);
// Is there still the need to show a menu that is not empty?
if (!bcma.Cancel &&
(bcma.KryptonContextMenu != null) &&
CommonHelper.ValidKryptonContextMenu(bcma.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
bcma.KryptonContextMenu.Closed += OnKryptonContextMenuClosed;
bcma.KryptonContextMenu.Show(_kryptonBreadCrumb, _kryptonBreadCrumb.RectangleToScreen(new Rectangle(viewButton.SplitRectangle.X - viewButton.SplitRectangle.Width,
viewButton.SplitRectangle.Y,
viewButton.SplitRectangle.Width * 2,
viewButton.SplitRectangle.Height)),
bcma.PositionH,
bcma.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();
}
}
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 = breadCrumb;
}
}
}
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
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 += 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 += 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 += 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;
}
}
}
/// <summary>
/// Initialize a new instance of the KryptonDropButton class.
/// </summary>
public KryptonDropButton()
{
// We generate click events manually, suppress default
// production of them by the base Control class
SetStyle(ControlStyles.StandardClick |
ControlStyles.StandardDoubleClick, false);
// Set default button properties
_style = ButtonStyle.Standalone;
DialogResult = DialogResult.None;
_useMnemonic = true;
// Create content storage
Values = CreateButtonValues(NeedPaintDelegate);
Values.TextChanged += OnButtonTextChanged;
Images = new DropDownButtonImages(NeedPaintDelegate);
// Image need an extra redirector to check the local images first
_paletteDropDownButtonImages = new PaletteRedirectDropDownButton(Redirector, Images);
// Create the palette storage
StateCommon = new PaletteTripleRedirect(Redirector, PaletteBackStyle.ButtonStandalone, PaletteBorderStyle.ButtonStandalone, PaletteContentStyle.ButtonStandalone, NeedPaintDelegate);
StateDisabled = new PaletteTriple(StateCommon, NeedPaintDelegate);
StateNormal = new PaletteTriple(StateCommon, NeedPaintDelegate);
StateTracking = new PaletteTriple(StateCommon, NeedPaintDelegate);
StatePressed = new PaletteTriple(StateCommon, NeedPaintDelegate);
OverrideDefault = new PaletteTripleRedirect(Redirector, PaletteBackStyle.ButtonStandalone, PaletteBorderStyle.ButtonStandalone, PaletteContentStyle.ButtonStandalone, NeedPaintDelegate);
OverrideFocus = new PaletteTripleRedirect(Redirector, PaletteBackStyle.ButtonStandalone, PaletteBorderStyle.ButtonStandalone, PaletteContentStyle.ButtonStandalone, NeedPaintDelegate);
// Create the override handling classes
_overrideFocus = new PaletteTripleOverride(OverrideFocus, StateNormal, PaletteState.FocusOverride);
_overrideNormal = new PaletteTripleOverride(OverrideDefault, _overrideFocus, PaletteState.NormalDefaultOverride);
_overrideTracking = new PaletteTripleOverride(OverrideFocus, StateTracking, PaletteState.FocusOverride);
_overridePressed = new PaletteTripleOverride(OverrideFocus, StatePressed, PaletteState.FocusOverride);
// Create the view button instance
_drawButton = new ViewDrawButton(StateDisabled,
_overrideNormal,
_overrideTracking,
_overridePressed,
new PaletteMetricRedirect(Redirector),
this,
VisualOrientation.Top,
UseMnemonic)
{
// Set default button state
DropDown = true,
Splitter = true,
TestForFocusCues = true,
DropDownPalette = _paletteDropDownButtonImages
};
// Create a button controller to handle button style behaviour
_buttonController = new ButtonController(_drawButton, NeedPaintDelegate)
{
BecomesFixed = true
};
// Assign the controller to the view element to treat as a button
_drawButton.MouseController = _buttonController;
_drawButton.KeyController = _buttonController;
_drawButton.SourceController = _buttonController;
// Need to know when user clicks the button view or mouse selects it
_buttonController.Click += OnButtonClick;
_buttonController.MouseSelect += OnButtonSelect;
// Create the view manager instance
ViewManager = new ViewManager(this, _drawButton);
}