/// <summary>Callback that is invoked whenever anything is added or removed from <see cref="Tabs" /> so that we can trigger a redraw of the tabs.</summary>
/// <param name="sender">Object for which this event was raised.</param>
/// <param name="e">Arguments associated with the event.</param>
private void _tabs_CollectionModified(object sender, ListModificationEventArgs e)
{
SetFrameSize();
if (e.Modification == ListModification.ItemAdded || e.Modification == ListModification.RangeAdded)
{
for (int i = 0; i < e.Count; i++)
{
TitleBarTab currentTab = Tabs[i + e.StartIndex];
currentTab.Content.TextChanged += Content_TextChanged;
currentTab.Closing += TitleBarTabs_Closing;
if (AeroPeekEnabled)
{
TaskbarManager.Instance.TabbedThumbnail.SetActiveTab(CreateThumbnailPreview(currentTab));
}
}
}
if (_overlay != null)
{
_overlay.Render(true);
}
}
/// <summary>
/// Called when a torn tab is dragged into the <see cref="TitleBarTabs.TabDropArea" /> of <see cref="_parentWindow" />. Places the tab in the list and
/// sets <see cref="IsTabRepositioning" /> to true to simulate the user continuing to drag the tab around in the window.
/// </summary>
/// <param name="tab">Tab that was dragged into this window.</param>
/// <param name="cursorLocation">Location of the user's cursor.</param>
internal virtual void CombineTab(TitleBarTab tab, Point cursorLocation)
{
// Stop rendering to prevent weird stuff from happening like the wrong tab being focused
_suspendRendering = true;
// Find out where to insert the tab in the list
int dropIndex = _parentWindow.Tabs.FindIndex(t => t.Area.Left <= cursorLocation.X && t.Area.Right >= cursorLocation.X);
// Simulate the user having clicked in the middle of the tab when they started dragging it so that the tab will move correctly within the window
// when the user continues to move the mouse
_tabClickOffset = _parentWindow.Tabs.First().Area.Width / 2;
IsTabRepositioning = true;
tab.Parent = _parentWindow;
if (dropIndex == -1)
{
_parentWindow.Tabs.Add(tab);
dropIndex = _parentWindow.Tabs.Count - 1;
}
else
{
_parentWindow.Tabs.Insert(dropIndex, tab);
}
// Resume rendering
_suspendRendering = false;
_parentWindow.SelectedTabIndex = dropIndex;
_parentWindow.ResizeTabContents();
}
/// <summary>Calls <see cref="CreateTab" />, adds the resulting tab to the <see cref="Tabs" /> collection, and activates it.</summary>
public virtual void AddNewTab()
{
TitleBarTab newTab = CreateTab();
Tabs.Add(newTab);
ResizeTabContents(newTab);
SelectedTabIndex = _tabs.Count - 1;
}
/// <summary>Checks to see if the <paramref name="cursor" /> is over the <see cref="TitleBarTab.CloseButtonArea" /> of the given <paramref name="tab" />.</summary>
/// <param name="tab">The tab whose <see cref="TitleBarTab.CloseButtonArea" /> we are to check to see if it contains <paramref name="cursor" />.</param>
/// <param name="cursor">Current position of the cursor.</param>
/// <returns>True if the <paramref name="tab" />'s <see cref="TitleBarTab.CloseButtonArea" /> contains <paramref name="cursor" />, false otherwise.</returns>
public virtual bool IsOverCloseButton(TitleBarTab tab, Point cursor)
{
if (!tab.ShowCloseButton || _wasTabRepositioning)
{
return(false);
}
Rectangle absoluteCloseButtonArea = new Rectangle(
tab.Area.X + tab.CloseButtonArea.X, tab.Area.Y + tab.CloseButtonArea.Y, tab.CloseButtonArea.Width, tab.CloseButtonArea.Height);
return(absoluteCloseButtonArea.Contains(cursor));
}
/// <summary>Constructor; initializes the window and constructs the tab thumbnail image to use when dragging.</summary>
/// <param name="tab">Tab that was torn out of its parent window.</param>
/// <param name="tabRenderer">Renderer instance to use when drawing the actual tab.</param>
public TornTabForm(TitleBarTab tab, base_tab_renderer tabRenderer)
{
_layeredWindow = new LayeredWindow();
_initialized = false;
// Set drawing styles
SetStyle(ControlStyles.DoubleBuffer, true);
// This should show up as a semi-transparent borderless window
Opacity = 0.70;
ShowInTaskbar = false;
FormBorderStyle = FormBorderStyle.None;
// ReSharper disable DoNotCallOverridableMethodsInConstructor
BackColor = Color.Fuchsia;
// ReSharper restore DoNotCallOverridableMethodsInConstructor
TransparencyKey = Color.Fuchsia;
AllowTransparency = true;
Disposed += TornTabForm_Disposed;
// Get the tab thumbnail (full size) and then draw the actual representation of the tab onto it as well
Bitmap tabContents = tab.GetImage();
Bitmap contentsAndTab = new Bitmap(tabContents.Width, tabContents.Height + tabRenderer.TabHeight, tabContents.PixelFormat);
Graphics tabGraphics = Graphics.FromImage(contentsAndTab);
tabGraphics.DrawImage(tabContents, 0, tabRenderer.TabHeight);
bool oldShowAddButton = tabRenderer.ShowAddButton;
tabRenderer.ShowAddButton = false;
tabRenderer.Render(
new List <TitleBarTab>
{
tab
}, tabGraphics, new Point(0, 0), new Point(0, 0), true);
tabRenderer.ShowAddButton = oldShowAddButton;
// Scale the thumbnail down to half size
_tabThumbnail = new Bitmap(contentsAndTab.Width / 2, contentsAndTab.Height / 2, contentsAndTab.PixelFormat);
Graphics thumbnailGraphics = Graphics.FromImage(_tabThumbnail);
thumbnailGraphics.InterpolationMode = InterpolationMode.High;
thumbnailGraphics.CompositingQuality = CompositingQuality.HighQuality;
thumbnailGraphics.SmoothingMode = SmoothingMode.AntiAlias;
thumbnailGraphics.DrawImage(contentsAndTab, 0, 0, _tabThumbnail.Width, _tabThumbnail.Height);
Width = _tabThumbnail.Width - 1;
Height = _tabThumbnail.Height - 1;
_cursorOffset = new Point(tabRenderer.TabContentWidth / 4, tabRenderer.TabHeight / 4);
SetWindowPosition(Cursor.Position);
}
/// <summary>Resizes the <see cref="TitleBarTab.Content" /> form of the <paramref name="tab" /> to match the size of the client area for this window.</summary>
/// <param name="tab">Tab whose <see cref="TitleBarTab.Content" /> form we should resize; if not specified, we default to
/// <see cref="SelectedTab" />.</param>
public void ResizeTabContents(TitleBarTab tab = null)
{
if (tab == null)
{
tab = SelectedTab;
}
if (tab != null)
{
tab.Content.Location = new Point(0, Padding.Top - 1);
tab.Content.Size = new Size(ClientRectangle.Width, ClientRectangle.Height - Padding.Top + 1);
}
}
/// <summary>
/// Callback for the <see cref="TabSelected" /> event. Called when a <see cref="TitleBarTab" /> gains focus. Sets the active window in Aero Peek via a
/// call to <see cref="TabbedThumbnailManager.SetActiveTab(Control)" />.
/// </summary>
/// <param name="e">Arguments associated with the event.</param>
protected void OnTabSelected(TitleBarTabEventArgs e)
{
if (SelectedTabIndex != -1 && _previews.ContainsKey(SelectedTab.Content) && AeroPeekEnabled)
{
TaskbarManager.Instance.TabbedThumbnail.SetActiveTab(SelectedTab.Content);
}
_previousActiveTab = SelectedTab;
if (TabSelected != null)
{
TabSelected(this, e);
}
}
/// <summary>
/// Creates a new thumbnail for <paramref name="tab" /> when the application is initially enabled for AeroPeek or when it is turned on sometime during
/// execution.
/// </summary>
/// <param name="tab">Tab that we are to create the thumbnail for.</param>
/// <returns>Thumbnail created for <paramref name="tab" />.</returns>
protected virtual TabbedThumbnail CreateThumbnailPreview(TitleBarTab tab)
{
TabbedThumbnail preview = new TabbedThumbnail(Handle, tab.Content)
{
Title = tab.Content.Text,
Tooltip = tab.Content.Text
};
preview.SetWindowIcon(tab.Content.Icon);
preview.TabbedThumbnailActivated += preview_TabbedThumbnailActivated;
preview.TabbedThumbnailClosed += preview_TabbedThumbnailClosed;
preview.TabbedThumbnailBitmapRequested += preview_TabbedThumbnailBitmapRequested;
preview.PeekOffset = new Vector(Padding.Left, Padding.Top - 1);
TaskbarManager.Instance.TabbedThumbnail.AddThumbnailPreview(preview);
return(preview);
}
/// <summary>Removes <paramref name="closingTab" /> from <see cref="Tabs" /> and selects the next applicable tab in the list.</summary>
/// <param name="closingTab">Tab that is being closed.</param>
protected virtual void CloseTab(TitleBarTab closingTab)
{
int removeIndex = Tabs.IndexOf(closingTab);
int selectedTabIndex = SelectedTabIndex;
Tabs.Remove(closingTab);
if (selectedTabIndex > removeIndex)
{
SelectedTabIndex = selectedTabIndex - 1;
}
else if (selectedTabIndex == removeIndex)
{
SelectedTabIndex = Math.Min(selectedTabIndex, Tabs.Count - 1);
}
else
{
SelectedTabIndex = selectedTabIndex;
}
if (_previews.ContainsKey(closingTab.Content))
{
_previews[closingTab.Content].Dispose();
_previews.Remove(closingTab.Content);
}
if (_previousActiveTab != null && closingTab.Content == _previousActiveTab.Content)
{
_previousActiveTab = null;
}
if (!closingTab.Content.IsDisposed && AeroPeekEnabled)
{
TaskbarManager.Instance.TabbedThumbnail.RemoveThumbnailPreview(closingTab.Content);
}
if (Tabs.Count == 0 && ExitOnLastTabClose)
{
Close();
}
}
/// <summary>Generate a new thumbnail image for <paramref name="tab" />.</summary>
/// <param name="tab">Tab that we need to generate a thumbnail for.</param>
protected void UpdateTabThumbnail(TitleBarTab tab)
{
TabbedThumbnail preview = TaskbarManager.Instance.TabbedThumbnail.GetThumbnailPreview(tab.Content);
if (preview == null)
{
return;
}
Bitmap bitmap = TabbedThumbnailScreenCapture.GrabWindowBitmap(tab.Content.Handle, tab.Content.Size);
preview.SetImage(bitmap);
// If we already had a preview image for the tab, dispose of it
if (_previews.ContainsKey(tab.Content) && _previews[tab.Content] != null)
{
_previews[tab.Content].Dispose();
}
_previews[tab.Content] = bitmap;
}
/// <summary>
/// Called from the <see cref="_parentWindow" /> to determine which, if any, of the <paramref name="tabs" /> the <paramref name="cursor" /> is
/// over.
/// </summary>
/// <param name="tabs">The list of tabs that we should check.</param>
/// <param name="cursor">The relative position of the cursor within the window.</param>
/// <returns>The tab within <paramref name="tabs" /> that the <paramref name="cursor" /> is over; if none, then null is returned.</returns>
public virtual TitleBarTab OverTab(IEnumerable <TitleBarTab> tabs, Point cursor)
{
TitleBarTab overTab = null;
foreach (TitleBarTab tab in tabs.Where(tab => tab.TabImage != null))
{
// We have to loop through each of the tabs in turn and check their status; if the tabs overlap, then their areas overlap as well, which means
// that we may find see that the cursor is over an inactive tab, but we need to check the active tabs as well, since they may overlap their
// areas and take precedence.
if (tab.Active && IsOverTab(tab, cursor))
{
overTab = tab;
break;
}
if (IsOverTab(tab, cursor))
{
overTab = tab;
}
}
return(overTab);
}
/// <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))));
}
}
}
/// <summary>Internal method for rendering an individual <paramref name="tab" /> to the screen.</summary>
/// <param name="graphicsContext">Graphics context to use when rendering the tab.</param>
/// <param name="tab">Individual tab that we are to render.</param>
/// <param name="area">Area of the screen that the tab should be rendered to.</param>
/// <param name="cursor">Current position of the cursor.</param>
protected virtual void Render(Graphics graphicsContext, TitleBarTab tab, Rectangle area, Point cursor)
{
if (_suspendRendering)
{
return;
}
// If we need to redraw the tab image
if (tab.TabImage == null)
{
// We render the tab to an internal property so that we don't necessarily have to redraw it in every rendering pass, only if its width or
// status have changed
tab.TabImage = new Bitmap(
area.Width, tab.Active
? _activeCenterImage.Height
: _inactiveCenterImage.Height);
using (Graphics tabGraphicsContext = Graphics.FromImage(tab.TabImage))
{
// Draw the left, center, and right portions of the tab
tabGraphicsContext.DrawImage(
tab.Active
? _activeLeftSideImage
: _inactiveLeftSideImage, new Rectangle(
0, 0, tab.Active
? _activeLeftSideImage
.Width
: _inactiveLeftSideImage
.Width,
tab.Active
? _activeLeftSideImage.
Height
: _inactiveLeftSideImage
.Height), 0, 0,
tab.Active
? _activeLeftSideImage.Width
: _inactiveLeftSideImage.Width, tab.Active
? _activeLeftSideImage.Height
: _inactiveLeftSideImage.Height,
GraphicsUnit.Pixel);
tabGraphicsContext.DrawImage(
tab.Active
? _activeCenterImage
: _inactiveCenterImage, new Rectangle(
(tab.Active
? _activeLeftSideImage.
Width
: _inactiveLeftSideImage
.Width), 0,
_tabContentWidth, tab.Active
? _activeCenterImage
.
Height
: _inactiveCenterImage
.
Height),
0, 0, _tabContentWidth, tab.Active
? _activeCenterImage.Height
: _inactiveCenterImage.Height,
GraphicsUnit.Pixel);
tabGraphicsContext.DrawImage(
tab.Active
? _activeRightSideImage
: _inactiveRightSideImage, new Rectangle(
(tab.Active
? _activeLeftSideImage
.Width
: _inactiveLeftSideImage
.Width) +
_tabContentWidth, 0,
tab.Active
? _activeRightSideImage
.Width
: _inactiveRightSideImage
.Width,
tab.Active
? _activeRightSideImage
.Height
: _inactiveRightSideImage
.Height), 0, 0,
tab.Active
? _activeRightSideImage.Width
: _inactiveRightSideImage.Width, tab.Active
? _activeRightSideImage.Height
: _inactiveRightSideImage.
Height,
GraphicsUnit.Pixel);
// Draw the close button
if (tab.ShowCloseButton)
{
Image closeButtonImage = IsOverCloseButton(tab, cursor)
? _closeButtonHoverImage
: _closeButtonImage;
tab.CloseButtonArea = new Rectangle(
area.Width - (tab.Active
? _activeRightSideImage.Width
: _inactiveRightSideImage.Width) -
CloseButtonMarginRight - closeButtonImage.Width,
CloseButtonMarginTop, closeButtonImage.Width,
closeButtonImage.Height);
tabGraphicsContext.DrawImage(
closeButtonImage, tab.CloseButtonArea, 0, 0,
closeButtonImage.Width, closeButtonImage.Height,
GraphicsUnit.Pixel);
}
}
tab.Area = area;
}
// Render the tab's saved image to the screen
graphicsContext.DrawImage(
tab.TabImage, area, 0, 0, tab.TabImage.Width, tab.TabImage.Height,
GraphicsUnit.Pixel);
// Render the icon for the tab's content, if it exists and there's room for it in the tab's content area
if (tab.Content.ShowIcon && _tabContentWidth > 16 + IconMarginLeft + (tab.ShowCloseButton
? CloseButtonMarginLeft +
tab.CloseButtonArea.Width +
CloseButtonMarginRight
: 0))
{
graphicsContext.DrawIcon(
new Icon(tab.Content.Icon, 16, 16),
new Rectangle(area.X + OverlapWidth + IconMarginLeft, IconMarginTop + area.Y, 16, 16));
}
// Render the caption for the tab's content if there's room for it in the tab's content area
if (_tabContentWidth > (tab.Content.ShowIcon
? 16 + IconMarginLeft + IconMarginRight
: 0) + CaptionMarginLeft + CaptionMarginRight + (tab.ShowCloseButton
? CloseButtonMarginLeft +
tab.CloseButtonArea.Width +
CloseButtonMarginRight
: 0))
{
graphicsContext.DrawString(
tab.Caption, SystemFonts.CaptionFont, Brushes.Black,
new Rectangle(
area.X + OverlapWidth + CaptionMarginLeft + (tab.Content.ShowIcon
? IconMarginLeft +
16 +
IconMarginRight
: 0),
CaptionMarginTop + area.Y,
_tabContentWidth - (tab.Content.ShowIcon
? IconMarginLeft + 16 + IconMarginRight
: 0) - (tab.ShowCloseButton
? _closeButtonImage.Width +
CloseButtonMarginRight +
CloseButtonMarginLeft
: 0), tab.TabImage.Height),
new StringFormat(StringFormatFlags.NoWrap)
{
Trimming = StringTrimming.EllipsisCharacter
});
}
}
/// <summary>Renders the list of <paramref name="tabs" /> to the screen using the given <paramref name="graphicsContext" />.</summary>
/// <param name="tabs">List of tabs that we are to render.</param>
/// <param name="graphicsContext">Graphics context that we should use while rendering.</param>
/// <param name="cursor">Current location of the cursor on the screen.</param>
/// <param name="forceRedraw">Flag indicating whether or not the redraw should be forced.</param>
/// <param name="offset">Offset within <paramref name="graphicsContext" /> that the tabs should be rendered.</param>
public virtual void Render(List <TitleBarTab> tabs, Graphics graphicsContext, Point offset, Point cursor, bool forceRedraw = false)
{
if (_suspendRendering)
{
return;
}
if (tabs == null || tabs.Count == 0)
{
return;
}
Point screenCoordinates = _parentWindow.PointToScreen(_parentWindow.ClientRectangle.Location);
// Calculate the maximum tab area, excluding the add button and any minimize/maximize/close buttons in the window
_maxTabArea.Location = new Point(SystemInformation.BorderSize.Width + offset.X + screenCoordinates.X, offset.Y + screenCoordinates.Y);
_maxTabArea.Width = (_parentWindow.ClientRectangle.Width - offset.X -
(ShowAddButton
? _addButtonImage.Width + AddButtonMarginLeft +
AddButtonMarginRight
: 0) - (tabs.Count() * OverlapWidth) -
(_parentWindow.ControlBox
? SystemInformation.CaptionButtonSize.Width
: 0) -
(_parentWindow.MinimizeBox
? SystemInformation.CaptionButtonSize.Width
: 0) -
(_parentWindow.MaximizeBox
? SystemInformation.CaptionButtonSize.Width
: 0));
_maxTabArea.Height = _activeCenterImage.Height;
// Get the width of the content area for each tab by taking the parent window's client width, subtracting the left and right border widths and the
// add button area (if applicable) and then dividing by the number of tabs
int tabContentWidth = Math.Min(_activeCenterImage.Width, Convert.ToInt32(Math.Floor(Convert.ToDouble(_maxTabArea.Width / tabs.Count()))));
// Determine if we need to redraw the TabImage properties for each tab by seeing if the content width that we calculated above is equal to content
// width we had in the previous rendering pass
bool redraw = (tabContentWidth != _tabContentWidth || forceRedraw);
if (redraw)
{
_tabContentWidth = tabContentWidth;
}
int i = tabs.Count - 1;
List <Tuple <TitleBarTab, Rectangle> > activeTabs = new List <Tuple <TitleBarTab, Rectangle> >();
// Render the background image
if (_background != null)
{
graphicsContext.DrawImage(_background, offset.X, offset.Y, _parentWindow.Width, _activeCenterImage.Height);
}
int selectedIndex = tabs.FindIndex(t => t.Active);
if (selectedIndex != -1)
{
Rectangle tabArea = new Rectangle(
SystemInformation.BorderSize.Width + offset.X +
(selectedIndex * (tabContentWidth + _activeLeftSideImage.Width + _activeRightSideImage.Width - OverlapWidth)),
offset.Y, tabContentWidth + _activeLeftSideImage.Width + _activeRightSideImage.Width,
_activeCenterImage.Height);
if (IsTabRepositioning && _tabClickOffset != null)
{
// Make sure that the user doesn't move the tab past the beginning of the list or the outside of the window
tabArea.X = cursor.X - _tabClickOffset.Value;
tabArea.X = Math.Max(SystemInformation.BorderSize.Width + offset.X, tabArea.X);
tabArea.X =
Math.Min(
SystemInformation.BorderSize.Width + (_parentWindow.WindowState == FormWindowState.Maximized
? _parentWindow.ClientRectangle.Width - (_parentWindow.ControlBox
? SystemInformation.CaptionButtonSize.Width
: 0) -
(_parentWindow.MinimizeBox
? SystemInformation.CaptionButtonSize.Width
: 0) -
(_parentWindow.MaximizeBox
? SystemInformation.CaptionButtonSize.Width
: 0)
: _parentWindow.ClientRectangle.Width) - tabArea.Width, tabArea.X);
int dropIndex = 0;
// Figure out which slot the active tab is being "dropped" over
if (tabArea.X - SystemInformation.BorderSize.Width - offset.X - TabRepositionDragDistance > 0)
{
dropIndex =
Math.Min(
Convert.ToInt32(
Math.Round(
Convert.ToDouble(tabArea.X - SystemInformation.BorderSize.Width - offset.X - TabRepositionDragDistance) /
Convert.ToDouble(tabArea.Width - OverlapWidth))), tabs.Count - 1);
}
// If the tab has been moved over another slot, move the tab object in the window's tab list
if (dropIndex != selectedIndex)
{
TitleBarTab tab = tabs[selectedIndex];
_parentWindow.Tabs.SuppressEvents();
_parentWindow.Tabs.Remove(tab);
_parentWindow.Tabs.Insert(dropIndex, tab);
_parentWindow.Tabs.ResumeEvents();
}
}
activeTabs.Add(new Tuple <TitleBarTab, Rectangle>(tabs[selectedIndex], tabArea));
}
// Loop through the tabs in reverse order since we need the ones farthest on the left to overlap those to their right
foreach (TitleBarTab tab in ((IEnumerable <TitleBarTab>)tabs).Reverse())
{
Rectangle tabArea =
new Rectangle(
SystemInformation.BorderSize.Width + offset.X +
(i * (tabContentWidth + _activeLeftSideImage.Width + _activeRightSideImage.Width - OverlapWidth)),
offset.Y, tabContentWidth + _activeLeftSideImage.Width + _activeRightSideImage.Width,
_activeCenterImage.Height);
// If we need to redraw the tab image, null out the property so that it will be recreated in the call to Render() below
if (redraw)
{
tab.TabImage = null;
}
// In this first pass, we only render the inactive tabs since we need the active tabs to show up on top of everything else
if (!tab.Active)
{
Render(graphicsContext, tab, tabArea, cursor);
}
i--;
}
// In the second pass, render all of the active tabs identified in the previous pass
foreach (Tuple <TitleBarTab, Rectangle> tab in activeTabs)
{
Render(graphicsContext, tab.Item1, tab.Item2, cursor);
}
_previousTabCount = tabs.Count;
// Render the add tab button to the screen
if (ShowAddButton && !IsTabRepositioning)
{
_addButtonArea =
new Rectangle(
(_previousTabCount *
(tabContentWidth + _activeLeftSideImage.Width + _activeRightSideImage.Width - OverlapWidth)) +
_activeRightSideImage.Width + AddButtonMarginLeft + offset.X,
AddButtonMarginTop + offset.Y, _addButtonImage.Width, _addButtonImage.Height);
bool cursorOverAddButton = IsOverAddButton(cursor);
graphicsContext.DrawImage(
cursorOverAddButton
? _addButtonHoverImage
: _addButtonImage, _addButtonArea, 0, 0, cursorOverAddButton
? _addButtonHoverImage.Width
: _addButtonImage.Width,
cursorOverAddButton
? _addButtonHoverImage.Height
: _addButtonImage.Height, GraphicsUnit.Pixel);
}
}
/// <summary>Tests whether the <paramref name="cursor" /> is hovering over the given <paramref name="tab" />.</summary>
/// <param name="tab">Tab that we are to see if the cursor is hovering over.</param>
/// <param name="cursor">Current location of the cursor.</param>
/// <returns>
/// True if the <paramref name="cursor" /> is within the <see cref="TitleBarTab.Area" /> of the <paramref name="tab" /> and is over a non- transparent
/// pixel of <see cref="TitleBarTab.TabImage" />, false otherwise.
/// </returns>
protected virtual bool IsOverTab(TitleBarTab tab, Point cursor)
{
return(IsOverNonTransparentArea(tab.Area, tab.TabImage, cursor));
}
/// <summary>Overrides the message pump for the window so that we can respond to click events on the tabs themselves.</summary>
/// <param name="m">Message received by the pump.</param>
protected override void WndProc(ref Message m)
{
switch ((WM)m.Msg)
{
case WM.WM_NCLBUTTONDOWN:
case WM.WM_LBUTTONDOWN:
Point relativeCursorPosition = GetRelativeCursorPosition(Cursor.Position);
// If we were over a tab, set the capture state for the window so that we'll actually receive a WM_LBUTTONUP message
if (_parentForm.TabRenderer.OverTab(_parentForm.Tabs, relativeCursorPosition) == null &&
!_parentForm.TabRenderer.IsOverAddButton(relativeCursorPosition))
{
_parentForm.ForwardMessage(ref m);
}
else
{
// When the user clicks a mouse button, save the tab that the user was over so we can respond properly when the mouse button is released
TitleBarTab clickedTab = _parentForm.TabRenderer.OverTab(_parentForm.Tabs, relativeCursorPosition);
if (clickedTab != null)
{
// If the user clicked the close button, remove the tab from the list
if (!_parentForm.TabRenderer.IsOverCloseButton(clickedTab, relativeCursorPosition))
{
_parentForm.ResizeTabContents(clickedTab);
_parentForm.SelectedTabIndex = _parentForm.Tabs.IndexOf(clickedTab);
Render();
}
OnMouseDown(new MouseEventArgs(MouseButtons.Left, 1, Cursor.Position.X, Cursor.Position.Y, 0));
}
_parentForm.Activate();
}
break;
case WM.WM_LBUTTONDBLCLK:
_parentForm.ForwardMessage(ref m);
break;
// We always return HTCAPTION for the hit test message so that the underlying window doesn't have its focus removed
case WM.WM_NCHITTEST:
m.Result = new IntPtr((int)HT.HTCAPTION);
break;
case WM.WM_LBUTTONUP:
case WM.WM_NCLBUTTONUP:
Point relativeCursorPosition2 = GetRelativeCursorPosition(Cursor.Position);
if (_parentForm.TabRenderer.OverTab(_parentForm.Tabs, relativeCursorPosition2) == null &&
!_parentForm.TabRenderer.IsOverAddButton(relativeCursorPosition2))
{
_parentForm.ForwardMessage(ref m);
}
else
{
// When the user clicks a mouse button, save the tab that the user was over so we can respond properly when the mouse button is released
TitleBarTab clickedTab = _parentForm.TabRenderer.OverTab(_parentForm.Tabs, relativeCursorPosition2);
if (clickedTab != null)
{
// If the user clicked the close button, remove the tab from the list
if (_parentForm.TabRenderer.IsOverCloseButton(clickedTab, relativeCursorPosition2))
{
clickedTab.Content.Close();
Render();
}
else
{
_parentForm.OnTabClicked(
new TitleBarTabEventArgs
{
Tab = clickedTab,
TabIndex = _parentForm.SelectedTabIndex,
Action = TabControlAction.Selected,
WasDragging = _wasDragging
});
}
}
// Otherwise, if the user clicked the add button, call CreateTab to add a new tab to the list and select it
else if (_parentForm.TabRenderer.IsOverAddButton(relativeCursorPosition2))
{
_parentForm.AddNewTab();
}
OnMouseUp(new MouseEventArgs(MouseButtons.Left, 1, Cursor.Position.X, Cursor.Position.Y, 0));
}
break;
default:
base.WndProc(ref m);
break;
}
}
/// <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))));
}
}
}