private void On_tabItem_PreviewMouseButtonDown(object sender, MouseButtonEventArgs e)
{
if (this._suppressEvent)
{
return;
}
//如果发生事件的源头在 _tabControl 中的 TabItem
var newItem = e.Source as TabItem;
if (newItem != null && newItem.Parent == this._tabControl)
{
var oldItem = this._tabControl.SelectedItem as TabItem;
if (oldItem != e.Source)
{
var deactiveWindow = GetWindow(oldItem);
var activeWindow = GetWindow(newItem);;
var args = new WorkspaceWindowActivingEventArgs(deactiveWindow, activeWindow);
this.OnWindowActiving(args);
if (args.Cancel)
{
e.Handled = true;
}
else
{
//由于在 Activing 事件中很可能会让 newItem 失去焦点（例如弹出窗口），所以需要重新让该页签获取焦点，
//否则页签由于没有焦点，就不会发生 SelectedItemChanged 事件。
newItem.Focus();
}
}
}
}
public bool TryActive(WorkspaceWindow window)
{
try
{
this._suppressEvent = true;
TabItem newItem = GetTabItem(window.Title);
if (newItem != null)
{
var oldItem = this._tabControl.SelectedItem as TabItem;
if (oldItem == newItem)
{
return(true);
}
var args = new WorkspaceWindowActivingEventArgs(GetWindow(oldItem), window);
this.OnWindowActiving(args);
if (!args.Cancel)
{
this._tabControl.SelectedItem = newItem;
this.OnWindowActived(args);
return(true);
}
}
return(false);
}
finally
{
this._suppressEvent = false;
}
}
private void OnWindowActiving(WorkspaceWindowActivingEventArgs e)
{
var handler = this.WindowActiving;
if (handler != null)
{
handler(this, e);
}
}
private void On_tabItem_PreviewMouseButtonDown(object sender, MouseButtonEventArgs e)
{
if (this._suppressEvent) return;
//如果发生事件的源头在 _tabControl 中的 TabItem
var newItem = e.Source as TabItem;
if (newItem != null && newItem.Parent == this._tabControl)
{
var oldItem = this._tabControl.SelectedItem as TabItem;
if (oldItem != e.Source)
{
var deactiveWindow = GetWindow(oldItem);
var activeWindow = GetWindow(newItem); ;
var args = new WorkspaceWindowActivingEventArgs(deactiveWindow, activeWindow);
this.OnWindowActiving(args);
if (args.Cancel)
{
e.Handled = true;
}
else
{
//由于在 Activing 事件中很可能会让 newItem 失去焦点（例如弹出窗口），所以需要重新让该页签获取焦点，
//否则页签由于没有焦点，就不会发生 SelectedItemChanged 事件。
newItem.Focus();
}
}
}
}
private void OnWindowActiving(WorkspaceWindowActivingEventArgs e)
{
var handler = this.WindowActiving;
if (handler != null) handler(this, e);
}
public bool TryActive(WorkspaceWindow window)
{
try
{
this._suppressEvent = true;
TabItem newItem = GetTabItem(window.Title);
if (newItem != null)
{
var oldItem = this._tabControl.SelectedItem as TabItem;
if (oldItem == newItem) { return true; }
var args = new WorkspaceWindowActivingEventArgs(GetWindow(oldItem), window);
this.OnWindowActiving(args);
if (!args.Cancel)
{
this._tabControl.SelectedItem = newItem;
this.OnWindowActived(args);
return true;
}
}
return false;
}
finally
{
this._suppressEvent = false;
}
}
void Workspace_WindowActiving(object sender, WorkspaceWindowActivingEventArgs e)
{
if (e.DeactiveWindow == this._ownerWindow)
{
this.SaveIfDirty(() => e.Cancel = true);
}
}