private void InvalidatePart(CustomScrollBarPart area)
{
switch (area)
{
case CustomScrollBarPart.DecreaseButton:
Invalidate(DecreaseButtonBounds);
break;
case CustomScrollBarPart.IncreaseButton:
Invalidate(IncreaseButtonBounds);
break;
case CustomScrollBarPart.DecreaseTrackBar:
Invalidate(DecreaseTrackBarBounds);
break;
case CustomScrollBarPart.IncreaseTrackBar:
Invalidate(IncreaseTrackBarBounds);
break;
case CustomScrollBarPart.Thumb:
Invalidate(ThumbBounds);
break;
}
}
protected override void RenderPart(CustomScrollBarPart part, Orientation scrollBarOrientation, Graphics graphics, Rectangle bounds, bool isEnabled, bool isHovered, bool isPressed)
{
if (bounds.Width <= 0 || bounds.Height <= 0)
{
return;
}
switch (part)
{
case CustomScrollBarPart.DecreaseButton:
switch (scrollBarOrientation)
{
case Orientation.Horizontal:
RenderLeftArrow(graphics, bounds, isEnabled, isHovered, isPressed);
break;
case Orientation.Vertical:
RenderUpArrow(graphics, bounds, isEnabled, isHovered, isPressed);
break;
default:
throw new ArgumentException();
}
break;
case CustomScrollBarPart.DecreaseTrackBar:
RenderTrackBar(graphics, bounds);
break;
case CustomScrollBarPart.Thumb:
switch (scrollBarOrientation)
{
case Orientation.Horizontal:
RenderHorizontalThumb(graphics, bounds, isEnabled, isHovered, isPressed);
break;
case Orientation.Vertical:
RenderVerticalThumb(graphics, bounds, isEnabled, isHovered, isPressed);
break;
default:
throw new ArgumentException();
}
break;
case CustomScrollBarPart.IncreaseTrackBar:
RenderTrackBar(graphics, bounds);
break;
case CustomScrollBarPart.IncreaseButton:
switch (scrollBarOrientation)
{
case Orientation.Horizontal:
RenderRightArrow(graphics, bounds, isEnabled, isHovered, isPressed);
break;
case Orientation.Vertical:
RenderDownArrow(graphics, bounds, isEnabled, isHovered, isPressed);
break;
default:
throw new ArgumentException();
}
break;
}
}
public virtual void Render(
Orientation scrollBarOrientation, bool isEnabled, Graphics graphics, Rectangle clipRectangle,
Rectangle decreaseButtonBounds, Rectangle decreaseTrackBarBounds, Rectangle thumbBounds, Rectangle increaseTrackBarBounds, Rectangle increaseButtonBounds,
CustomScrollBarPart hoveredPart, CustomScrollBarPart pressedPart)
{
if (pressedPart != CustomScrollBarPart.None)
{
hoveredPart = pressedPart;
}
if (decreaseButtonBounds.IntersectsWith(clipRectangle))
{
RenderPart(
CustomScrollBarPart.DecreaseButton,
scrollBarOrientation,
graphics,
decreaseButtonBounds,
isEnabled,
hoveredPart == CustomScrollBarPart.DecreaseButton,
pressedPart == CustomScrollBarPart.DecreaseButton);
}
if (decreaseTrackBarBounds.IntersectsWith(clipRectangle))
{
RenderPart(
CustomScrollBarPart.DecreaseTrackBar,
scrollBarOrientation,
graphics,
decreaseTrackBarBounds,
isEnabled,
hoveredPart == CustomScrollBarPart.DecreaseTrackBar,
pressedPart == CustomScrollBarPart.DecreaseTrackBar);
}
if (thumbBounds.IntersectsWith(clipRectangle))
{
RenderPart(
CustomScrollBarPart.Thumb,
scrollBarOrientation,
graphics,
thumbBounds,
isEnabled,
hoveredPart == CustomScrollBarPart.Thumb,
pressedPart == CustomScrollBarPart.Thumb);
}
if (increaseTrackBarBounds.IntersectsWith(clipRectangle))
{
RenderPart(
CustomScrollBarPart.IncreaseTrackBar,
scrollBarOrientation,
graphics,
increaseTrackBarBounds,
isEnabled,
hoveredPart == CustomScrollBarPart.IncreaseTrackBar,
pressedPart == CustomScrollBarPart.IncreaseTrackBar);
}
if (increaseButtonBounds.IntersectsWith(clipRectangle))
{
RenderPart(
CustomScrollBarPart.IncreaseButton,
scrollBarOrientation,
graphics,
increaseButtonBounds,
isEnabled,
hoveredPart == CustomScrollBarPart.IncreaseButton,
pressedPart == CustomScrollBarPart.IncreaseButton);
}
}
protected abstract void RenderPart(CustomScrollBarPart part, Orientation scrollBarOrientation, Graphics graphics, Rectangle bounds, bool isEnabled, bool isHovered, bool isPressed);
private void InvalidatePart(CustomScrollBarPart area)
{
switch(area)
{
case CustomScrollBarPart.DecreaseButton:
Invalidate(DecreaseButtonBounds);
break;
case CustomScrollBarPart.IncreaseButton:
Invalidate(IncreaseButtonBounds);
break;
case CustomScrollBarPart.DecreaseTrackBar:
Invalidate(DecreaseTrackBarBounds);
break;
case CustomScrollBarPart.IncreaseTrackBar:
Invalidate(IncreaseTrackBarBounds);
break;
case CustomScrollBarPart.Thumb:
Invalidate(ThumbBounds);
break;
}
}
protected override void OnMouseUp(MouseEventArgs e)
{
if(PressedPart != CustomScrollBarPart.None)
{
if(PressedPart == CustomScrollBarPart.Thumb)
{
if(EndScroll(_mouseDownPoint, e.Location))
{
Invalidate();
}
var value = ClampValue(ThumbPositionToValue());
if(Value != value)
{
_value = value;
OnValueChanged();
}
OnScroll(ScrollEventType.ThumbPosition, _trackValue, value);
OnScroll(ScrollEventType.EndScroll, value, value);
}
else
{
if(_timer.Enabled)
{
_timer.Enabled = false;
OnScroll(ScrollEventType.EndScroll, Value, Value);
}
}
PressedPart = CustomScrollBarPart.None;
}
base.OnMouseUp(e);
}
protected override void OnMouseDown(MouseEventArgs e)
{
switch(e.Button)
{
case MouseButtons.Left:
PressedPart = HitTest(e.X, e.Y);
_mouseDownPoint = e.Location;
switch(PressedPart)
{
case CustomScrollBarPart.DecreaseButton:
case CustomScrollBarPart.DecreaseTrackBar:
case CustomScrollBarPart.IncreaseTrackBar:
case CustomScrollBarPart.IncreaseButton:
OnTimerTick(_timer, EventArgs.Empty);
_timer.Interval = 400;
_timer.Enabled = true;
break;
case CustomScrollBarPart.Thumb:
_trackValue = Value;
OnScroll(ScrollEventType.ThumbTrack, _trackValue, _trackValue);
BeginScroll(_mouseDownPoint);
break;
}
break;
}
base.OnMouseDown(e);
}
public virtual void Render(
Orientation scrollBarOrientation, bool isEnabled, Graphics graphics, Rectangle clipRectangle,
Rectangle decreaseButtonBounds, Rectangle decreaseTrackBarBounds, Rectangle thumbBounds, Rectangle increaseTrackBarBounds, Rectangle increaseButtonBounds,
CustomScrollBarPart hoveredPart, CustomScrollBarPart pressedPart)
{
if(pressedPart != CustomScrollBarPart.None)
{
hoveredPart = pressedPart;
}
if(decreaseButtonBounds.IntersectsWith(clipRectangle))
{
RenderPart(
CustomScrollBarPart.DecreaseButton,
scrollBarOrientation,
graphics,
decreaseButtonBounds,
isEnabled,
hoveredPart == CustomScrollBarPart.DecreaseButton,
pressedPart == CustomScrollBarPart.DecreaseButton);
}
if(decreaseTrackBarBounds.IntersectsWith(clipRectangle))
{
RenderPart(
CustomScrollBarPart.DecreaseTrackBar,
scrollBarOrientation,
graphics,
decreaseTrackBarBounds,
isEnabled,
hoveredPart == CustomScrollBarPart.DecreaseTrackBar,
pressedPart == CustomScrollBarPart.DecreaseTrackBar);
}
if(thumbBounds.IntersectsWith(clipRectangle))
{
RenderPart(
CustomScrollBarPart.Thumb,
scrollBarOrientation,
graphics,
thumbBounds,
isEnabled,
hoveredPart == CustomScrollBarPart.Thumb,
pressedPart == CustomScrollBarPart.Thumb);
}
if(increaseTrackBarBounds.IntersectsWith(clipRectangle))
{
RenderPart(
CustomScrollBarPart.IncreaseTrackBar,
scrollBarOrientation,
graphics,
increaseTrackBarBounds,
isEnabled,
hoveredPart == CustomScrollBarPart.IncreaseTrackBar,
pressedPart == CustomScrollBarPart.IncreaseTrackBar);
}
if(increaseButtonBounds.IntersectsWith(clipRectangle))
{
RenderPart(
CustomScrollBarPart.IncreaseButton,
scrollBarOrientation,
graphics,
increaseButtonBounds,
isEnabled,
hoveredPart == CustomScrollBarPart.IncreaseButton,
pressedPart == CustomScrollBarPart.IncreaseButton);
}
}
protected abstract void RenderPart(CustomScrollBarPart part, Orientation scrollBarOrientation, Graphics graphics, Rectangle bounds, bool isEnabled, bool isHovered, bool isPressed);
protected override void RenderPart(CustomScrollBarPart part, Orientation scrollBarOrientation, Graphics graphics, Rectangle bounds, bool isEnabled, bool isHovered, bool isPressed)
{
if(bounds.Width <= 0 || bounds.Height <= 0) return;
switch(part)
{
case CustomScrollBarPart.DecreaseButton:
switch(scrollBarOrientation)
{
case Orientation.Horizontal:
RenderLeftArrow(graphics, bounds, isEnabled, isHovered, isPressed);
break;
case Orientation.Vertical:
RenderUpArrow(graphics, bounds, isEnabled, isHovered, isPressed);
break;
default:
throw new ArgumentException();
}
break;
case CustomScrollBarPart.DecreaseTrackBar:
RenderTrackBar(graphics, bounds);
break;
case CustomScrollBarPart.Thumb:
switch(scrollBarOrientation)
{
case Orientation.Horizontal:
RenderHorizontalThumb(graphics, bounds, isEnabled, isHovered, isPressed);
break;
case Orientation.Vertical:
RenderVerticalThumb(graphics, bounds, isEnabled, isHovered, isPressed);
break;
default:
throw new ArgumentException();
}
break;
case CustomScrollBarPart.IncreaseTrackBar:
RenderTrackBar(graphics, bounds);
break;
case CustomScrollBarPart.IncreaseButton:
switch(scrollBarOrientation)
{
case Orientation.Horizontal:
RenderRightArrow(graphics, bounds, isEnabled, isHovered, isPressed);
break;
case Orientation.Vertical:
RenderDownArrow(graphics, bounds, isEnabled, isHovered, isPressed);
break;
default:
throw new ArgumentException();
}
break;
}
}