/// <summary>
/// Process a dialog key in a manner appropriate for the view.
/// </summary>
/// <param name="keyData">Key data.</param>
/// <returns>True if the key eaten; otherwise false.</returns>
public override bool ProcessDialogKey(Keys keyData)
{
// Find out which modifier keys are being pressed
bool shift = ((keyData & Keys.Shift) == Keys.Shift);
bool control = ((keyData & Keys.Control) == Keys.Control);
// Extract just the key and not modifier keys
Keys keyCode = (keyData & Keys.KeyCode);
// There must be a selected page before any action can occur
if (Navigator.SelectedPage != null)
{
// Check for keys without modifiers
switch (keyCode)
{
case Keys.Tab:
// Using a CONTROL tab means selecting another page
if (control)
{
// Are we allowed to perform a Ctrl+Tab change in selection
CtrlTabCancelEventArgs ce = new CtrlTabCancelEventArgs(!shift);
Navigator.OnCtrlTabStart(ce);
if (!ce.Cancel)
{
bool changed = !shift?SelectNextPage(Navigator.SelectedPage, true, true) : SelectPreviousPage(Navigator.SelectedPage, true, true);
}
}
return(true);
}
}
// Last of all check for a shortcut to the action buttons
return(CheckActionShortcuts(keyData));
}
/// <summary>
/// Process a dialog key in a manner appropriate for the view.
/// </summary>
/// <param name="keyData">Key data.</param>
/// <returns>True if the key eaten; otherwise false.</returns>
public override bool ProcessDialogKey(Keys keyData)
{
// Find out which modifier keys are being pressed
bool shift = ((keyData & Keys.Shift) == Keys.Shift);
bool control = ((keyData & Keys.Control) == Keys.Control);
// Extract just the key and not modifier keys
Keys keyCode = (keyData & Keys.KeyCode);
// There must be a selected page before any action can occur
if (Navigator.SelectedPage != null)
{
switch (keyCode)
{
case Keys.Tab:
// Using a CONTROL tab means selecting the another page
if (control)
{
// Are we allowed to perform a Ctrl+Tab change in selection
CtrlTabCancelEventArgs ce = new CtrlTabCancelEventArgs(!shift);
Navigator.OnCtrlTabStart(ce);
if (!ce.Cancel)
{
bool changed = !shift?SelectNextPage(Navigator.SelectedPage, true, true) : SelectPreviousPage(Navigator.SelectedPage, true, true);
}
}
return(true);
case Keys.Home:
if (_hasFocus)
{
SelectNextPage(null, false, false);
return(true);
}
break;
case Keys.End:
if (_hasFocus)
{
SelectPreviousPage(null, false, false);
return(true);
}
break;
case Keys.Up:
if (_hasFocus)
{
// Can only use Up arrow when on a vertical stack
if (Navigator.Stack.StackOrientation == Orientation.Vertical)
{
SelectPreviousPage(Navigator.SelectedPage, false, false);
}
return(true);
}
break;
case Keys.Down:
if (_hasFocus)
{
// Can only use Down arrow when on a vertical stack
if (Navigator.Stack.StackOrientation == Orientation.Vertical)
{
SelectNextPage(Navigator.SelectedPage, false, false);
}
return(true);
}
break;
case Keys.Right:
if (_hasFocus)
{
// Can only use Right arrow when on a horizontal stack
if (Navigator.Stack.StackOrientation == Orientation.Horizontal)
{
// Reverse the direction if working RightToLeft
if (Navigator.RightToLeft != RightToLeft.Yes)
{
SelectNextPage(Navigator.SelectedPage, false, false);
}
else
{
SelectPreviousPage(Navigator.SelectedPage, false, false);
}
}
return(true);
}
break;
case Keys.Left:
if (_hasFocus)
{
// Can only use Right arrow when on a horizontal stack
if (Navigator.Stack.StackOrientation == Orientation.Horizontal)
{
// Reverse the direction if working RightToLeft
if (Navigator.RightToLeft != RightToLeft.Yes)
{
SelectPreviousPage(Navigator.SelectedPage, false, false);
}
else
{
SelectNextPage(Navigator.SelectedPage, false, false);
}
}
return(true);
}
break;
case Keys.Space:
case Keys.Enter:
if (_hasFocus)
{
KeyPressedPageView();
}
break;
}
}
// We do not eat the key
return(false);
}
/// <summary>
/// Select the previous page to the one provided.
/// </summary>
/// <param name="page">Starting page for search.</param>
/// <param name="wrap">Wrap around end of collection to the start.</param>
/// <param name="ctrlTab">Associated with a Ctrl+Tab action.</param>
/// <returns>True if new page selected; otherwise false.</returns>
public virtual bool SelectPreviousPage(KryptonPage page,
bool wrap,
bool ctrlTab)
{
// There must be at least one page and allowed to select a page
if ((Navigator.Pages.Count > 0) && Navigator.AllowTabSelect)
{
KryptonPage first;
// If given a starting page, it must be in the pages collection,
// otherwise we start by searching from the last page backwards
if ((page != null) && Navigator.Pages.Contains(page))
{
first = Navigator.PreviousActionPage(page);
// If at start of collection and wrapping is enabled then get the last page
if ((first == null) && wrap)
{
// Are we allowed to wrap around?
CtrlTabCancelEventArgs ce = new CtrlTabCancelEventArgs(false);
Navigator.OnCtrlTabWrap(ce);
if (ce.Cancel)
{
return(false);
}
first = Navigator.LastActionPage();
}
}
else
{
first = Navigator.LastActionPage();
}
// Page to test is the first one
KryptonPage previous = first;
// Keep testing previous pages until no more are left
while (previous != null)
{
// Attempt to select the previous page
Navigator.SelectedPage = previous;
// If previous page was selected, then all finished
if (Navigator.SelectedPage == previous)
{
return(true);
}
else
{
// Otherwise keep looking for another visible previous page
previous = Navigator.PreviousActionPage(previous);
// If we reached the start of the collection and we should wrap
if ((previous == null) && wrap)
{
// Are we allowed to wrap around?
CtrlTabCancelEventArgs ce = new CtrlTabCancelEventArgs(false);
Navigator.OnCtrlTabWrap(ce);
if (ce.Cancel)
{
return(false);
}
// Wrap around to the last page
previous = Navigator.Pages[Navigator.Pages.Count - 1];
}
// If we are back at the first page we examined then we must have
// wrapped around collection and still found nothing, time to exit
if (previous == first)
{
return(false);
}
}
}
}
return(false);
}