/// <summary>
/// 在鼠标向下时发生
/// </summary>
protected override void OnMouseDown(MouseEventArgs e)
{
_isMouseDownInTabButton = false;
_isMovingTabButton = false;
if (IsMouseOverScrollBackButton)
{
IsMouseDownInScrollBackButton = true;
ScrollBack();
}
else if (IsMouseOverScrollNextButton)
{
IsMouseDownInScrollNextButton = true;
ScrollNext();
}
else if (_captionButtonsBounds.Contains(e.Location))
{
int captionIndex = ButtonsRenderer.GetCaptionButtonIndex(_captionButtonsBounds, e.Location);
OnMouseDownInCaptionButton(captionIndex, e);
}
else
{
int index = 0;
UnitButton button = GetButtonFromPoint(e.Location, out index);
if (button != null)
{
SelectedIndex = index;
Invalidate();
_isMouseDownInTabButton = e.Button == MouseButtons.Left;
OnMouseDownInTabButton(button);
}
}
base.OnMouseDown(e);
}
/// <summary>
/// 当鼠标光标移到面板上时发生
/// </summary>
protected override void OnMouseMove(MouseEventArgs e)
{
Cursor cursor = Cursors.Default;
if (_isMouseDownInTabButton && e.Button == MouseButtons.Left)
{
cursor = Cursors.Hand;
if (_isMovingTabButton)
{
UnitButton selected = _buttons[SelectedIndex];
if (selected.Contains(e.Location) == false)
{
if (_isDraggingTabButton)
{
ContinueButtonDrag(e.Location, ref cursor);
}
else
{
int index = -1;
UnitButton underMouse = GetButtonFromPoint(e.Location, true, out index);
if (underMouse != null)
{
bool displace = false;
if (underMouse == _buttonDisplaced)
{
if (index < SelectedIndex)
{
displace = ButtonsRenderer.CanUndoDisplaceBack(underMouse, selected, e.Location);
}
else if (index > SelectedIndex)
{
displace = ButtonsRenderer.CanUndoDisplaceNext(underMouse, selected, e.Location);
}
}
_buttonDisplaced = underMouse;
if (displace)
{
_buttons[index] = selected;
_buttons[SelectedIndex] = underMouse;
_updatePositionsOnDraw = true;
SelectedIndex = index;
}
}
else
{
_isDraggingTabButton = BeginButtonDrag(selected, e.Location, ref cursor);
}
}
}
}
else
{
_isMovingTabButton = _buttons[SelectedIndex].Contains(e.Location);
_isDraggingTabButton = false;
}
}
else if (GetButtonFromPoint(e.Location) != null)
{
cursor = Cursors.Hand;
}
CheckIfIsMouseOverScrollButtons(e.Location);
if (IsMouseOverScrollBackButton && _firstShownButtonIndex > 0)
{
cursor = Cursors.Hand;
}
else if (IsMouseOverScrollNextButton && _canScrollNext)
{
cursor = Cursors.Hand;
}
int captionIndex = ButtonsRenderer.GetCaptionButtonIndex(_captionButtonsBounds, e.Location);
if (captionIndex < 0 || captionIndex >= ButtonsCount)
{
captionIndex = -1;
}
else
{
cursor = Cursors.Hand;
}
if (_captionButtonIndexUnderMouse != captionIndex)
{
_captionButtonIndexUnderMouse = captionIndex;
OnMouseMoveOverCaptionButton(captionIndex, e);
Invalidate();
}
int buttonIndex = -1;
UnitButton buttonUnderMouse = GetButtonFromPoint(e.Location, false, out buttonIndex);
if (buttonUnderMouse != null)
{
OnMouseMoveOverTabButton(buttonUnderMouse);
}
Cursor = cursor;
base.OnMouseMove(e);
}
/// <summary>
/// 在需要绘制时发生
/// </summary>
protected override void OnPaint(PaintEventArgs e)
{
if (_clientBounds != ClientRectangle || _updatePositionsOnDraw)
{
_clientBounds = ClientRectangle;
_updatePositionsOnDraw = false;
UpdatePositions(e.Graphics, false);
}
OnPaintPanelBackground(e);
if (CaptionButtonsCount > 0)
{
OnDrawCaptionButtons(_captionButtonsBounds, e.Graphics);
}
DrawRoundBorder(e);
int buttonsCount = _buttons.Count;
if (buttonsCount == 1 && ShowOneTabButton == false)
{
buttonsCount = 0;
}
if (buttonsCount > 0)
{
DrawButtonsLine(e);
RectangleF clip = e.Graphics.ClipBounds;
e.Graphics.SetClip(_buttonsPanelBounds);
for (int index = buttonsCount - 1; index >= 0; index--)
{
if (index != SelectedIndex)
{
_buttons[index].Draw(ButtonsRenderer, false, Font, e.Graphics);
}
}
_buttons[SelectedIndex].Draw(ButtonsRenderer, true, Font, e.Graphics);
e.Graphics.SetClip(clip);
}
if (_hasScrolls && buttonsCount > 1)
{
UnitButtonState stateBack = UnitButtonState.Normal;
UnitButtonState stateNext = UnitButtonState.Normal;
if (_firstShownButtonIndex == 0)
{
stateBack = UnitButtonState.Disabled;
}
else if (IsMouseDownInScrollBackButton)
{
stateBack = UnitButtonState.Pressed | UnitButtonState.UnderMouseCursor;
}
else if (IsMouseOverScrollBackButton)
{
stateBack = UnitButtonState.UnderMouseCursor;
}
else if (IsMouseDownInScrollNextButton)
{
stateNext = UnitButtonState.Pressed | UnitButtonState.UnderMouseCursor;
}
else if (IsMouseOverScrollNextButton)
{
stateNext = UnitButtonState.UnderMouseCursor;
}
if (_canScrollNext == false)
{
stateNext = UnitButtonState.Disabled;
}
ButtonsRenderer.DrawScrollBackButton(_scrollBackBounds, stateBack, e.Graphics);
ButtonsRenderer.DrawScrollNextButton(_scrollNextBounds, stateNext, e.Graphics);
}
base.OnPaint(e);
}
/// <summary>
/// 绘制按钮线条
/// </summary>
protected virtual void DrawButtonsLine(PaintEventArgs e)
{
ButtonsRenderer.DrawButtonsLine(e.Graphics, _clientBounds, _buttonsPanelBounds);
}
/// <summary>
/// 更新面板上的位置
/// </summary>
private void UpdatePositions(Graphics graphics, bool forceChangeNotification)
{
Rectangle bounds = new Rectangle();
Rectangle pagesPanelBounds = _clientBounds;
int buttonsCount = _buttons.Count;
if (buttonsCount == 1 && ShowOneTabButton == false)
{
buttonsCount = 0;
}
if (buttonsCount != 0)
{
bounds = ButtonsRenderer.GetFirstButtonBounds(_clientBounds, false, 0, _buttons[0].Text, Font, _buttons[0].PageIcon, graphics);
_buttons[0].SetBounds(bounds);
for (int index = 1; index < _buttons.Count; index++)
{
bounds = ButtonsRenderer.GetNextButtonBounds(bounds, _buttons[index].Text, Font, _buttons[index].PageIcon, graphics);
_buttons[index].SetBounds(bounds);
}
_buttonsPanelBounds = ButtonsRenderer.GetButtonsClipRectangle(_clientBounds, false, CaptionButtonsCount);
_hasScrolls = ButtonsRenderer.HasScroll(_buttonsPanelBounds, bounds);
if (_hasScrolls)
{
_buttonsPanelBounds = ButtonsRenderer.GetButtonsClipRectangle(_clientBounds, true, CaptionButtonsCount);
}
if (_hasScrolls)
{
int scrollPos = ButtonsRenderer.GetScrollPos(_buttons, _firstShownButtonIndex);
bounds = ButtonsRenderer.GetFirstButtonBounds(_clientBounds, true, scrollPos, _buttons[0].Text, Font, _buttons[0].PageIcon, graphics);
_buttons[0].SetBounds(bounds);
for (int index = 1; index < _buttons.Count; index++)
{
bounds = ButtonsRenderer.GetNextButtonBounds(bounds, _buttons[index].Text, Font, _buttons[index].PageIcon, graphics);
_buttons[index].SetBounds(bounds);
}
_scrollBackBounds = ButtonsRenderer.GetScrollBackButtonBounds(_buttonsPanelBounds);
_scrollNextBounds = ButtonsRenderer.GetScrollNextButtonBounds(_buttonsPanelBounds);
_canScrollNext = ButtonsRenderer.CanScrollNext(_buttons[ButtonsCount - 1], _scrollNextBounds) && _firstShownButtonIndex < ButtonsCount - 1;
}
pagesPanelBounds = ButtonsRenderer.GetClientRectangle(pagesPanelBounds);
}
_captionButtonsBounds = ButtonsRenderer.GetCaptionButtonsRectangle(_clientBounds, CaptionButtonsCount);
if (_pagesPanelBounds != pagesPanelBounds || forceChangeNotification)
{
_pagesPanelBounds = pagesPanelBounds;
pagesPanelBounds.Height++;
//pagesPanelBounds.Inflate(-PagesPanelMargins, -PagesPanelMargins);
OnPagesPanelBoundsChanged(pagesPanelBounds);
}
}
