|
public PaintTransformOffsetBy ( int dx, int dy ) : |
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| dx | int | |
| dy | int | |
| return | ||
public override void PaintBackground(IVwGraphics vg, PaintTransform ptrans)
{
base.PaintBackground(vg, ptrans);
PaintTransform childTrans = ptrans.PaintTransformOffsetBy(Left, Top);
for (Box box = FirstVisibleBox(vg, ptrans); box != null && !IsAfterVisibleBoxes(box, vg, ptrans); box = box.Next)
{
box.PaintBackground(vg, childTrans);
}
}
public override void PaintForeground(IVwGraphics vg, PaintTransform ptrans)
{
base.PaintForeground(vg, ptrans);
PaintTransform childTrans = ptrans.PaintTransformOffsetBy(Left, Top);
for (Box box = FirstVisibleBox(vg, ptrans); box != null && !IsAfterVisibleBoxes(box, vg, ptrans); box = box.Next)
{
//vg.PushClipRect(new Rect(box.Left, box.Top, box.Right, box.Bottom));
box.PaintForeground(vg, childTrans);
}
}
/// <summary>
/// If there is a leaf box at the specified position, return it. Also return the paint transform that should be
/// passed to operations on that box.
/// Enhance JohnT: should probably always return something, if box contains any leaf?
/// Where is in drawing coords.
/// </summary>
public override LeafBox FindBoxAt(Point where, PaintTransform ptrans, out PaintTransform leafBoxTransform)
{
var childTransform = ptrans.PaintTransformOffsetBy(Left, Top);
var hit = childTransform.ToLayout(where);
Box best = null; // if we don't find a box containing the point, this is the closest on the same line.
int bestDistance = int.MaxValue;
for (Box current = FirstBox; current != null; current = current.Next)
{
// If we're not even on the current line, keep trying.
if (hit.Y > current.Bottom)
{
continue;
}
if (hit.Y < current.Top)
{
continue;
}
// If it's within the borders of this box, return it unconditionally.
if (hit.X <= current.Right && hit.X >= current.Left)
{
return(current.FindBoxAt(where, childTransform, out leafBoxTransform));
}
// If we're on the right line, we'll return this if we don't find a better.
int distance = hit.X - current.Right;
if (hit.X < current.Left)
{
distance = current.Left - hit.X;
}
if (distance < bestDistance)
{
bestDistance = distance;
best = current;
}
}
if (best != null)
{
return(best.FindBoxAt(where, childTransform, out leafBoxTransform));
}
leafBoxTransform = ptrans; // arbitrary.
return(null);
}
public override void PaintBackground(IVwGraphics vg, PaintTransform ptrans)
{
base.PaintBackground(vg, ptrans);
PaintTransform childTrans = ptrans.PaintTransformOffsetBy(Left, Top);
for (Box box = FirstVisibleBox(vg, ptrans); box != null && !IsAfterVisibleBoxes(box, vg, ptrans); box = box.Next)
box.PaintBackground(vg, childTrans);
}
public override void PaintForeground(IVwGraphics vg, PaintTransform ptrans)
{
base.PaintForeground(vg, ptrans);
PaintTransform childTrans = ptrans.PaintTransformOffsetBy(Left, Top);
for (Box box = FirstVisibleBox(vg, ptrans); box != null && !IsAfterVisibleBoxes(box, vg, ptrans); box = box.Next)
{
//vg.PushClipRect(new Rect(box.Left, box.Top, box.Right, box.Bottom));
box.PaintForeground(vg, childTrans);
}
}
/// <summary>
/// If there is a leaf box at the specified position, return it. Also return the paint transform that should be
/// passed to operations on that box.
/// Enhance JohnT: should probably always return something, if box contains any leaf?
/// Where is in drawing coords.
/// </summary>
public override LeafBox FindBoxAt(Point where, PaintTransform ptrans, out PaintTransform leafBoxTransform)
{
var childTransform = ptrans.PaintTransformOffsetBy(Left, Top);
var hit = childTransform.ToLayout(where);
Box best = null; // if we don't find a box containing the point, this is the closest on the same line.
int bestDistance = int.MaxValue;
for (Box current = FirstBox; current != null; current = current.Next)
{
// If we're not even on the current line, keep trying.
if (hit.Y > current.Bottom)
continue;
if (hit.Y < current.Top)
continue;
// If it's within the borders of this box, return it unconditionally.
if (hit.X <= current.Right && hit.X >= current.Left)
return current.FindBoxAt(where, childTransform, out leafBoxTransform);
// If we're on the right line, we'll return this if we don't find a better.
int distance = hit.X - current.Right;
if (hit.X < current.Left)
distance = current.Left - hit.X;
if (distance < bestDistance)
{
bestDistance = distance;
best = current;
}
}
if (best != null)
return best.FindBoxAt(where, childTransform, out leafBoxTransform);
leafBoxTransform = ptrans; // arbitrary.
return null;
}
