protected ScrollBar(ScrollBarOrientation orientation)
{
this._scrollBarOrientation = orientation;
this._mouseTimer = new Timer();
this._mouseTimer.Tick += new EventHandler(this.MouseTimerTick);
this._mouseTimer.Interval = 100;
this._mouseTimer.Enabled = false;
this._clickAction = ScrollBarHitRegion.None;
this._minimum = 0;
this._maximum = 100;
this._largeChange = 10;
this._smallChange = 1;
this._value = 0;
this._arrowButtonsLayout = ScrollBarArrowButtonsLayout.Edges;
this._leftUpButton = null;
this._leftUpButtonHighlight = null;
this._leftUpButtonDisabled = null;
this._leftUpButtonSize = 0x13;
this._rightDownButton = null;
this._rightDownButtonHighlight = null;
this._rightDownButtonDisabled = null;
this._rightDownButtonSize = 0x13;
this._lowTrack = null;
this._lowTrackHighlight = null;
this._lowTrackDisabled = null;
this._highTrack = null;
this._highTrackHighlight = null;
this._highTrackDisabled = null;
this._trackClickBehavior = ScrollBarTrackClickBehavior.Scroll;
this._thumb = null;
this._thumbHighlight = null;
this._thumbDisabled = null;
this._minimumThumbSize = 11;
this._maximumThumbSize = 0;
this._thumbMargins = new MarginPadding();
this._extension = null;
this._extensionSize = 13;
this._extensionLocation = ScrollBarExtensionLocation.LeftTop;
this._extensionVisible = true;
this._backgroundBufferBitmap = null;
this._backgroundBufferGraphics = null;
this._backgroundValid = BackgroundValid.Invalid;
this._backBufferBitmap = null;
this._backBufferGraphics = null;
this.DrawTrack = null;
this.DrawArrowButton = null;
this.DrawThumb = null;
this.ValueChanged = null;
this.MinimumReached = null;
this.MaximumReached = null;
}
protected override void OnMouseUp(MouseEventArgs e)
{
this._mouseTimer.Enabled = false;
switch (this._clickAction)
{
case ScrollBarHitRegion.LeftUpArrow:
this._backgroundValid |= BackgroundValid.LeftUpArrowInvalid;
break;
case ScrollBarHitRegion.RightDownArrow:
this._backgroundValid |= BackgroundValid.RightDownArrowInvalid;
break;
case ScrollBarHitRegion.TrackLow:
this._backgroundValid |= BackgroundValid.LowTrackInvalid;
break;
case ScrollBarHitRegion.TrackHigh:
this._backgroundValid |= BackgroundValid.HighTrackInvalid;
break;
case ScrollBarHitRegion.Extension:
if (this._extension != null)
{
this._extension.Mouse(ScrollBarExtensionBase.MouseAction.Up, e);
}
break;
}
this._clickAction = ScrollBarHitRegion.None;
base.OnMouseUp(e);
base.Invalidate();
}
protected override void OnMouseDown(MouseEventArgs e)
{
this._clickAction = this.HitTest(e.X, e.Y, out this._thumbPos);
if (((this._clickAction == ScrollBarHitRegion.TrackLow) || (this._clickAction == ScrollBarHitRegion.TrackHigh)) && (this._trackClickBehavior == ScrollBarTrackClickBehavior.Jump))
{
this._mouseX = base.Left - 1;
this._mouseY = base.Top - 1;
this._clickAction = ScrollBarHitRegion.Thumb;
this.SetValueToMousePosition(e.X, e.Y);
this._backgroundValid |= BackgroundValid.HighTrackInvalid | BackgroundValid.LowTrackInvalid;
this._mouseX = e.X;
this._mouseY = e.Y;
}
else
{
switch (this._clickAction)
{
case ScrollBarHitRegion.LeftUpArrow:
this.Value -= this.SmallChange;
this._mouseTimer.Enabled = true;
this._backgroundValid |= BackgroundValid.LeftUpArrowInvalid;
goto Label_01B7;
case ScrollBarHitRegion.RightDownArrow:
this.Value += this.SmallChange;
this._mouseTimer.Enabled = true;
this._backgroundValid |= BackgroundValid.RightDownArrowInvalid;
goto Label_01B7;
case ScrollBarHitRegion.TrackLow:
this.Value -= this.LargeChange;
this._mouseTimer.Enabled = true;
this._backgroundValid |= BackgroundValid.LowTrackInvalid;
goto Label_01B7;
case ScrollBarHitRegion.TrackHigh:
this.Value += this.LargeChange;
this._mouseTimer.Enabled = true;
this._backgroundValid |= BackgroundValid.HighTrackInvalid;
goto Label_01B7;
case ScrollBarHitRegion.Thumb:
this._mouseX = e.X;
this._mouseY = e.Y;
goto Label_01B7;
case ScrollBarHitRegion.Extension:
if (this._extension != null)
{
this._extension.Mouse(ScrollBarExtensionBase.MouseAction.Down, e);
}
goto Label_01B7;
}
}
Label_01B7:
base.OnMouseDown(e);
base.Invalidate();
}