private ApplicationScreen ConstructScreen(IApplicationBlock owner, Type screenType)
{
#region Pre-conditions
Debug.Assert(owner != null);
Debug.Assert(screenType != null);
Debug.Assert(screenType.IsSubclassOf(typeof(ApplicationScreen)));
#endregion
ApplicationScreen screen = null;
if (LongRunningScreens.ContainsKey(screenType))
{
screen = LongRunningScreens[screenType];
}
else
{
try {
// try to create with parameters
screen = Activator.CreateInstance(screenType, owner, this) as ApplicationScreen;
} catch (MissingMethodException) {
try {
// try to create with just block parameter
screen = Activator.CreateInstance(screenType, owner) as ApplicationScreen;
} catch (MissingMethodException) {
// try to create without parameters
screen = Activator.CreateInstance(screenType) as ApplicationScreen;
}
}
#region Validate
if (screen == null)
{
throw new ApplicationException(
string.Format(
"Could not instantiate the screen of type '{0}' as it did not inherit from '{1}'.",
screenType.Name,
typeof(ApplicationScreen).Name
)
);
}
#endregion
// set screen context if activation did not do so
//if (screen.ApplicationServices == null) {
// screen.ApplicationServices = base.ApplicationServices;
//}
if (screen.ApplicationBlock == null)
{
screen.ApplicationBlock = owner;
}
// add this screen to long running screens if it is not to be destroyed.
if (screen.ActivationMode == ScreenActivationMode.KeepAlive)
{
LongRunningScreens.Add(screenType, screen);
}
}
#region Post-conditions
Debug.Assert(screen != null);
#endregion
return(screen);
}
private void UnregisterScreenFromMenu(ApplicationScreen screen)
{
for (int i = 0; i < MenuStrip.Items.Count; i++)
{
if (MenuStrip.Items[i].Tag == screen)
{
MenuStrip.Items.RemoveAt(i);
break;
}
}
}
private void RegisterScreenInMenu(ApplicationScreen screen)
{
ToolStripMenuItem headerMenu = new ToolStripMenuItem(
screen.ApplicationMenuStripText
);
headerMenu.Tag = screen;
foreach (ToolStripItem menuItem in screen.MenuItems)
{
headerMenu.DropDownItems.Add(
menuItem
);
}
InsertMenuItemBeforeHelpMenu(headerMenu);
}
private void ShowScreen(ApplicationScreen screen)
{
#region Pre-conditions
Debug.Assert(screen != null);
#endregion
var cancelRemove = false;
// notify current view for permission to remove
ActiveScreen?.NotifyHideScreen(ref cancelRemove);
// remove if current view granted permission
if (!cancelRemove)
{
_splitContainer.Panel2.SuspendLayout();
// remove the view toolbar items if any
if (ActiveScreen != null)
{
UnregisterScreenFromMenu(ActiveScreen);
// put the tool buttons back into the screen toolbar
ActiveScreen.ToolBar?.Items.AddRange(ActiveViewButtons.ToArray());
ActiveViewButtons.Clear();
// remove the view control
if (_splitContainer.Panel2.Controls.Contains(ActiveScreen))
{
_splitContainer.Panel2.Controls.Remove(ActiveScreen);
}
// dispose view and release its resources
if (ActiveScreen.ActivationMode == ScreenActivationMode.AlwaysCreate)
{
ActiveScreen.Dispose();
}
}
// collapse menu if new screen demands it
bool collapseMenu =
screen.DisplayMode == ScreenDisplayMode.Filled ||
screen.DisplayMode == ScreenDisplayMode.FilledAndMaximized;
_splitContainer.Panel1Collapsed = collapseMenu;
// maximize if new screen demands it
bool maximize =
screen.DisplayMode == ScreenDisplayMode.FilledAndMaximized ||
screen.DisplayMode == ScreenDisplayMode.Maximized;
if (maximize)
{
base.WindowState = FormWindowState.Maximized;
}
// place the new view in the content panel
screen.Dock = DockStyle.Fill;
screen.Location = new Point(0, 0);
screen.Name = "VIEW";
screen.TabIndex = 0;
screen.Location = new Point(
_splitContainer.Panel2.Padding.Left,
_splitContainer.Panel2.Padding.Top
);
Size newSize = new Size(
_splitContainer.Width -
(_splitContainer.SplitterDistance + _splitContainer.SplitterWidth) -
(_splitContainer.Panel2.Padding.Left + _splitContainer.Panel2.Padding.Right),
_splitContainer.Height -
(_splitContainer.Panel2.Padding.Top + _splitContainer.Panel2.Padding.Bottom)
);
if (collapseMenu)
{
newSize.Width = newSize.Width + _splitContainer.SplitterDistance;
}
;
screen.Size = newSize;
screen.PerformLayout();
_splitContainer.Panel2.Controls.Add(screen);
_splitContainer.Panel2.ResumeLayout(false);
// set current view sa the active view
ActiveScreen = screen;
// place new tool strip items
if (ActiveScreen.ShowInApplicationMenuStrip)
{
RegisterScreenInMenu(ActiveScreen);
}
RebuildToolBar();
// let view know that it has begun
ActiveScreen.NotifyShow();
}
}
