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public static DistanceF ( |
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| pt1 | ||
| pt2 | ||
| return | float | |
float GetMinResolution(Graphics g)
{
// Determine pixel size in world coordinates.
PointF[] pts = { new PointF(0, 0), new PointF(1, 0) };
g.TransformPoints(CoordinateSpace.World, CoordinateSpace.Device, pts);
return(Util.DistanceF(pts[0], pts[1]));
}
// Hit test against highlighted handles, return the location of the best one, or (Nan, Nan) if none.
public PointF HitTestHandles(PointF locationTest, bool testBeziers)
{
return(new PointF(float.NaN, float.NaN));
#if false
float bestDistance = float.MaxValue;
PointF bestPoint = new PointF(float.NaN, float.NaN);
if (currentHighlights == null)
{
return(bestPoint);
}
RectangleF hitBounds;
// Compute the hit bounds rectangle. A point must be within this rectangle
// to be considered. This is equivalent to making sure the actual handle square is clicked on
Point locationPixel = Util.PointFromPointF(WorldToPixel(locationTest));
Rectangle rectPixel = new Rectangle(locationPixel.X - HandleRadius, locationPixel.Y - HandleRadius, HandleDiameter, HandleDiameter);
hitBounds = PixelToWorld(rectPixel);
// Determine the closest point of those handles that were clicked on.
for (int i = 0; i < currentHighlights.handles.Length; ++i)
{
PointF pt = currentHighlight.handles[i];
// Don't check bezier handles unless requested to.
if (!testBeziers && currentHighlight.handleKinds[i] == PointKind.BezierControl)
{
continue;
}
if (hitBounds.Contains(pt))
{
float distance = Util.DistanceF(pt, locationTest);
if (distance < bestDistance)
{
bestDistance = distance;
bestPoint = pt;
}
}
}
return(bestPoint);
#endif
}
void PointerMoved(bool mouseInViewport, int xViewport, int yViewport)
{
this.mouseInView = mouseInViewport;
if (mouseInView)
{
mouseLocation = PixelToWorld(new PointF(xViewport, yViewport));
if (OnMouseEvent != null)
{
OnMouseEvent(this, MouseAction.Move, -1, mouseDown, mouseLocation, mouseLocation);
}
ResetHoverTimer(mouseLocation);
// See if dragging is occurring/starting for any button
for (int buttonNumber = 0; buttonNumber < CountMouseButtons; ++buttonNumber)
{
// is a drag being started?
if (mouseDown[buttonNumber] && !mouseDrag[buttonNumber] && canDrag[buttonNumber] &&
WorldToPixelDistance(Util.DistanceF(mouseLocation, downPos[buttonNumber])) >= MinDragDistance)
{
mouseDrag[buttonNumber] = true;
DisableHoverTimer();
}
// is a drag in progress?
if (OnMouseEvent != null && mouseDown[buttonNumber] && mouseDrag[buttonNumber])
{
OnMouseEvent(this, MouseAction.Drag, buttonNumber, mouseDown, mouseLocation, downPos[buttonNumber]);
DisableHoverTimer();
}
}
}
else
{
mouseLocation = new PointF();
DisableHoverTimer();
}
if (OnPointerMove != null)
{
OnPointerMove(this, mouseInView, mouseLocation);
}
}
void MouseButtonUp(int buttonNumber, int xViewport, int yViewport)
{
PointF worldMouse = PixelToWorld(new PointF(xViewport, yViewport));
bool wasDown = mouseDown[buttonNumber];
bool wasDrag = mouseDrag[buttonNumber];
bool wasClick = false;
if (wasDown && !wasDrag &&
WorldToPixelDistance(Util.DistanceF(worldMouse, downPos[buttonNumber])) <= MaxClickDistance &&
Environment.TickCount - downTime[buttonNumber] <= MaxClickTime)
{
wasClick = true;
}
mouseDown[buttonNumber] = false;
mouseDrag[buttonNumber] = false;
if (OnMouseEvent != null)
{
if (wasDrag)
{
OnMouseEvent(this, MouseAction.DragEnd, buttonNumber, mouseDown, worldMouse, downPos[buttonNumber]);
}
else if (wasClick)
{
OnMouseEvent(this, MouseAction.Click, buttonNumber, mouseDown, downPos[buttonNumber], downPos[buttonNumber]);
}
else if (wasDown)
{
OnMouseEvent(this, MouseAction.Up, buttonNumber, mouseDown, worldMouse, downPos[buttonNumber]);
}
}
return;
}