/// <summary>Constructor that initializes the various resources that we use in rendering.</summary>
/// <param name="parentWindow">Parent window that this renderer belongs to.</param>
public chrome_tab_renderer(TitleBarTabs parentWindow)
: base(parentWindow)
{
// Initialize the various images to use during rendering
_activeLeftSideImage = Resources.tabLeft;
_activeRightSideImage = Resources.tabRight;
_activeCenterImage = Resources.tabCenter;
_inactiveLeftSideImage = Resources.tabInactiveLeft;
_inactiveRightSideImage = Resources.tabInactiveRight;
_inactiveCenterImage = Resources.tabInactiveCenter;
_closeButtonImage = Resources.tabClose;
_closeButtonHoverImage = Resources.tabCloseHover;
_background = Resources.tabBackground;
_addButtonImage = new Bitmap(Resources.tabAdd);
_addButtonHoverImage = new Bitmap(Resources.tabAddHover);
// Set the various positioning properties
CloseButtonMarginTop = 6;
CloseButtonMarginLeft = 2;
AddButtonMarginTop = 5;
AddButtonMarginLeft = -3;
CaptionMarginTop = 5;
IconMarginTop = 6;
IconMarginRight = 5;
AddButtonMarginRight = 5;
}
/// <summary>
/// Retrieves or creates the overlay for <paramref name="parentForm" />.
/// </summary>
/// <param name="parentForm">Parent form that we are to create the overlay for.</param>
/// <returns>
/// Newly-created or previously existing overlay for <paramref name="parentForm" />.
/// </returns>
public static TitleBarTabsOverlay GetInstance(TitleBarTabs parentForm)
{
if (!_parents.ContainsKey(parentForm))
{
_parents.Add(parentForm, new TitleBarTabsOverlay(parentForm));
}
return(_parents[parentForm]);
}
/// <summary>
/// Adds <paramref name="window" /> to <see cref="_openWindows" /> and attaches event handlers to its <see cref="Form.FormClosed" /> event to keep track
/// of it.
/// </summary>
/// <param name="window">Window that we're opening.</param>
public void OpenWindow(TitleBarTabs window)
{
if (!_openWindows.Contains(window))
{
window.ApplicationContext = this;
_openWindows.Add(window);
window.FormClosed += window_FormClosed;
}
}
/// <summary>Constructor; takes the initial window to display and, if it's not closing, opens it and shows it.</summary>
/// <param name="initialFormInstance">Initial window to display.</param>
public void Start(TitleBarTabs initialFormInstance)
{
if (initialFormInstance.IsClosing)
ExitThread();
else
{
OpenWindow(initialFormInstance);
initialFormInstance.Show();
}
}
/// <summary>
/// Creates the overlay window and attaches it to <paramref name="parentForm" />.
/// </summary>
/// <param name="parentForm">Parent form that the overlay should be rendered on top of.</param>
protected TitleBarTabsOverlay(TitleBarTabs parentForm)
{
_parentForm = parentForm;
// We don't want this window visible in the taskbar
ShowInTaskbar = false;
FormBorderStyle = FormBorderStyle.Sizable;
MinimizeBox = false;
MaximizeBox = false;
_aeroEnabled = _parentForm.IsCompositionEnabled;
Show(_parentForm);
AttachHandlers();
}
/// <summary>Default constructor that initializes the <see cref="_parentWindow" /> and <see cref="ShowAddButton" /> properties.</summary>
/// <param name="parentWindow">The parent window that this renderer instance belongs to.</param>
protected base_tab_renderer(TitleBarTabs parentWindow)
{
_parentWindow = parentWindow;
ShowAddButton = true;
TabRepositionDragDistance = 10;
TabTearDragDistance = 10;
parentWindow.Tabs.CollectionModified += Tabs_CollectionModified;
if (parentWindow._overlay != null)
{
parentWindow._overlay.MouseMove += Overlay_MouseMove;
parentWindow._overlay.MouseUp += Overlay_MouseUp;
parentWindow._overlay.MouseDown += Overlay_MouseDown;
}
}
/// <summary>
/// Event handler that is called when <see cref="_parentForm" /> is in the process of closing. This uninstalls <see cref="_hookproc" /> from the low-
/// level hooks list and stops the consumer thread that processes those events.
/// </summary>
/// <param name="sender">
/// Object from which this event originated, <see cref="_parentForm" /> in this case.
/// </param>
/// <param name="e">Arguments associated with this event.</param>
private void _parentForm_Closing(object sender, CancelEventArgs e)
{
TitleBarTabs form = (TitleBarTabs)sender;
if (form == null)
{
return;
}
if (_parents.ContainsKey(form))
{
_parents.Remove(form);
}
// Uninstall the mouse hook
User32.UnhookWindowsHookEx(_hookId);
// Kill the mouse events processing thread
_mouseEvents.CompleteAdding();
_mouseEventsThread.Abort();
}
/// <summary>Default constructor that initializes the various properties.</summary>
/// <param name="parent">Parent window that contains this tab.</param>
public TitleBarTab(TitleBarTabs parent)
{
ShowCloseButton = true;
Parent = parent;
}
/// <summary>
/// Consumer method that processes mouse events in <see cref="_mouseEvents" /> that are recorded by <see cref="MouseHookCallback" />.
/// </summary>
protected void InterpretMouseEvents()
{
foreach (MouseEvent mouseEvent in _mouseEvents.GetConsumingEnumerable())
{
int nCode = mouseEvent.nCode;
IntPtr wParam = mouseEvent.wParam;
MSLLHOOKSTRUCT?hookStruct = mouseEvent.MouseData;
if (nCode >= 0 && (int)WM.WM_MOUSEMOVE == (int)wParam)
{
// ReSharper disable PossibleInvalidOperationException
Point cursorPosition = new Point(hookStruct.Value.pt.x, hookStruct.Value.pt.y);
// ReSharper restore PossibleInvalidOperationException
bool reRender = false;
if (_tornTab != null)
{
// ReSharper disable ForCanBeConvertedToForeach
for (int i = 0; i < _dropAreas.Length; i++)
// ReSharper restore ForCanBeConvertedToForeach
{
// If the cursor is within the drop area, combine the tab for the window that belongs to that drop area
if (_dropAreas[i].Item2.Contains(cursorPosition))
{
TitleBarTab tabToCombine = null;
lock (_tornTabLock)
{
if (_tornTab != null)
{
tabToCombine = _tornTab;
_tornTab = null;
}
}
if (tabToCombine != null)
{
int i1 = i;
// In all cases where we need to affect the UI, we call Invoke so that those changes are made on the main UI thread since
// we are on a separate processing thread in this case
Invoke(
new Action(
() =>
{
_dropAreas[i1].Item1.TabRenderer.CombineTab(tabToCombine, cursorPosition);
tabToCombine = null;
_tornTabForm.Close();
_tornTabForm = null;
if (_parentForm.Tabs.Count == 0)
{
_parentForm.Close();
}
}));
}
}
}
}
else if (!_parentForm.TabRenderer.IsTabRepositioning)
{
// If we were over a close button previously, check to see if the cursor is still over that tab's
// close button; if not, re-render
if (_isOverCloseButtonForTab != -1 &&
(_isOverCloseButtonForTab >= _parentForm.Tabs.Count ||
!_parentForm.TabRenderer.IsOverCloseButton(_parentForm.Tabs[_isOverCloseButtonForTab], GetRelativeCursorPosition(cursorPosition))))
{
reRender = true;
_isOverCloseButtonForTab = -1;
}
// Otherwise, see if any tabs' close button is being hovered over
else
{
// ReSharper disable ForCanBeConvertedToForeach
for (int i = 0; i < _parentForm.Tabs.Count; i++)
// ReSharper restore ForCanBeConvertedToForeach
{
if (_parentForm.TabRenderer.IsOverCloseButton(_parentForm.Tabs[i], GetRelativeCursorPosition(cursorPosition)))
{
_isOverCloseButtonForTab = i;
reRender = true;
break;
}
}
}
}
else
{
Invoke(
new Action(
() =>
{
_wasDragging = true;
// When determining if a tab has been torn from the window while dragging, we take the drop area for this window and inflate it by the
// TabTearDragDistance setting
Rectangle dragArea = TabDropArea;
dragArea.Inflate(_parentForm.TabRenderer.TabTearDragDistance, _parentForm.TabRenderer.TabTearDragDistance);
// If the cursor is outside the tear area, tear it away from the current window
if (!dragArea.Contains(cursorPosition) && _tornTab == null)
{
lock (_tornTabLock)
{
if (_tornTab == null)
{
_parentForm.TabRenderer.IsTabRepositioning = false;
// Clear the event handler subscriptions from the tab and then create a thumbnail representation of it to use when dragging
_tornTab = _parentForm.SelectedTab;
_tornTab.ClearSubscriptions();
_tornTabForm = new TornTabForm(_tornTab, _parentForm.TabRenderer);
}
}
if (_tornTab != null)
{
_parentForm.SelectedTabIndex = (_parentForm.SelectedTabIndex == _parentForm.Tabs.Count - 1
? _parentForm.SelectedTabIndex - 1
: _parentForm.SelectedTabIndex + 1);
_parentForm.Tabs.Remove(_tornTab);
// If this tab was the only tab in the window, hide the parent window
if (_parentForm.Tabs.Count == 0)
{
_parentForm.Hide();
}
_tornTabForm.Show();
_dropAreas = (from window in _parentForm.ApplicationContext.OpenWindows.Where(w => w.Tabs.Count > 0)
select new Tuple <TitleBarTabs, Rectangle>(window, window.TabDropArea)).ToArray();
}
}
}));
}
Invoke(new Action(() => OnMouseMove(new MouseEventArgs(MouseButtons.None, 0, cursorPosition.X, cursorPosition.Y, 0))));
if (_parentForm.TabRenderer.IsTabRepositioning)
{
reRender = true;
}
if (reRender)
{
Invoke(new Action(() => Render(cursorPosition, true)));
}
}
else if (nCode >= 0 && (int)WM.WM_LBUTTONDOWN == (int)wParam)
{
_wasDragging = false;
}
else if (nCode >= 0 && (int)WM.WM_LBUTTONUP == (int)wParam)
{
// If we released the mouse button while we were dragging a torn tab, put that tab into a new window
if (_tornTab != null)
{
TitleBarTab tabToRelease = null;
lock (_tornTabLock)
{
if (_tornTab != null)
{
tabToRelease = _tornTab;
_tornTab = null;
}
}
if (tabToRelease != null)
{
Invoke(
new Action(
() =>
{
TitleBarTabs newWindow = (TitleBarTabs)Activator.CreateInstance(_parentForm.GetType());
// Set the initial window position and state properly
if (newWindow.WindowState == FormWindowState.Maximized)
{
Screen screen = Screen.AllScreens.First(s => s.WorkingArea.Contains(Cursor.Position));
newWindow.StartPosition = FormStartPosition.Manual;
newWindow.WindowState = FormWindowState.Normal;
newWindow.Left = screen.WorkingArea.Left;
newWindow.Top = screen.WorkingArea.Top;
newWindow.Width = screen.WorkingArea.Width;
newWindow.Height = screen.WorkingArea.Height;
}
else
{
newWindow.Left = Cursor.Position.X;
newWindow.Top = Cursor.Position.Y;
}
tabToRelease.Parent = newWindow;
_parentForm.ApplicationContext.OpenWindow(newWindow);
newWindow.Show();
newWindow.Tabs.Add(tabToRelease);
newWindow.SelectedTabIndex = 0;
newWindow.ResizeTabContents();
_tornTabForm.Close();
_tornTabForm = null;
if (_parentForm.Tabs.Count == 0)
{
_parentForm.Close();
}
}));
}
}
Invoke(new Action(() => OnMouseUp(new MouseEventArgs(MouseButtons.Left, 1, Cursor.Position.X, Cursor.Position.Y, 0))));
}
}
}
