/** Please be sure to call this should you ever
* override the default Draw() method.
*/
void Window::DrawViews( Rect frame )
{
/// \todo Only update the requested frame.
lock();
for ( int i = 0; i < CountChildren(); i++ )
{
View *view = ChildAt(i);
view->Draw( view->Bounds() );
view->DrawChildren( view->Bounds() );
}
unlock();
}
void View::DrawChildren( Rect rect )
{
if ( GetWindow() == NULL ) return;
lock();
for ( int i = 0; i < CountChildren(); i++ )
{
View *child = ChildAt(i);
child->Draw( rect );
child->DrawChildren( rect );
}
unlock();
}
void
View::Draw(DrawingEngine* drawingEngine, BRegion* effectiveClipping,
BRegion* windowContentClipping, bool deep)
{
if (!fVisible) {
// child views cannot be visible either
return;
}
if (fViewBitmap != NULL || fViewColor != B_TRANSPARENT_COLOR) {
// we can only draw within our own area
BRegion* redraw;
if ((fFlags & B_DRAW_ON_CHILDREN) != 0) {
// The client may actually want to prevent the background to
// be painted outside the user clipping.
redraw = fWindow->GetRegion(
ScreenAndUserClipping(windowContentClipping));
} else {
// Ignore user clipping as in BeOS for painting the background.
redraw = fWindow->GetRegion(
_ScreenClipping(windowContentClipping));
}
if (!redraw)
return;
// add the current clipping
redraw->IntersectWith(effectiveClipping);
Overlay* overlayCookie = _Overlay();
if (fViewBitmap != NULL && overlayCookie == NULL) {
// draw view bitmap
// TODO: support other options!
BRect rect = fBitmapDestination;
ConvertToScreenForDrawing(&rect);
align_rect_to_pixels(&rect);
if (fBitmapOptions & B_TILE_BITMAP_Y) {
// move rect up as much as needed
while (rect.top > redraw->Frame().top)
rect.OffsetBy(0.0, -(rect.Height() + 1));
}
if (fBitmapOptions & B_TILE_BITMAP_X) {
// move rect left as much as needed
while (rect.left > redraw->Frame().left)
rect.OffsetBy(-(rect.Width() + 1), 0.0);
}
// XXX: locking removed because the Window keeps the engine locked
// because it keeps track of syncing right now
// lock the drawing engine for as long as we need the clipping
// to be valid
if (rect.IsValid()/* && drawingEngine->Lock()*/) {
drawingEngine->ConstrainClippingRegion(redraw);
drawing_mode oldMode;
drawingEngine->SetDrawingMode(B_OP_COPY, oldMode);
if (fBitmapOptions & B_TILE_BITMAP) {
// tile across entire view
float start = rect.left;
while (rect.top < redraw->Frame().bottom) {
while (rect.left < redraw->Frame().right) {
drawingEngine->DrawBitmap(fViewBitmap,
fBitmapSource, rect, fBitmapOptions);
rect.OffsetBy(rect.Width() + 1, 0.0);
}
rect.OffsetBy(start - rect.left, rect.Height() + 1);
}
// nothing left to be drawn
redraw->MakeEmpty();
} else if (fBitmapOptions & B_TILE_BITMAP_X) {
// tile in x direction
while (rect.left < redraw->Frame().right) {
drawingEngine->DrawBitmap(fViewBitmap, fBitmapSource,
rect, fBitmapOptions);
rect.OffsetBy(rect.Width() + 1, 0.0);
}
// remove horizontal stripe from clipping
rect.left = redraw->Frame().left;
rect.right = redraw->Frame().right;
redraw->Exclude(rect);
} else if (fBitmapOptions & B_TILE_BITMAP_Y) {
// tile in y direction
while (rect.top < redraw->Frame().bottom) {
drawingEngine->DrawBitmap(fViewBitmap, fBitmapSource,
rect, fBitmapOptions);
rect.OffsetBy(0.0, rect.Height() + 1);
}
// remove vertical stripe from clipping
rect.top = redraw->Frame().top;
rect.bottom = redraw->Frame().bottom;
redraw->Exclude(rect);
} else {
// no tiling at all
drawingEngine->DrawBitmap(fViewBitmap, fBitmapSource,
rect, fBitmapOptions);
redraw->Exclude(rect);
}
drawingEngine->SetDrawingMode(oldMode);
// NOTE: It is ok not to reset the clipping, that
// would only waste time
// drawingEngine->Unlock();
}
}
if (fViewColor != B_TRANSPARENT_COLOR) {
// fill visible region with view color,
// this version of FillRegion ignores any
// clipping, that's why "redraw" needs to
// be correct
// see #634
// if (redraw->Frame().left < 0 || redraw->Frame().top < 0) {
// char message[1024];
// BRect c = effectiveClipping->Frame();
// BRect w = windowContentClipping->Frame();
// BRect r = redraw->Frame();
// sprintf(message, "invalid background: current clipping: (%d, %d)->(%d, %d), "
// "window content: (%d, %d)->(%d, %d), redraw: (%d, %d)->(%d, %d)",
// (int)c.left, (int)c.top, (int)c.right, (int)c.bottom,
// (int)w.left, (int)w.top, (int)w.right, (int)w.bottom,
// (int)r.left, (int)r.top, (int)r.right, (int)r.bottom);
// debugger(message);
// }
drawingEngine->FillRegion(*redraw, overlayCookie != NULL
? overlayCookie->Color() : fViewColor);
}
fWindow->RecycleRegion(redraw);
}
fBackgroundDirty = false;
// let children draw
if (deep) {
for (View* child = FirstChild(); child; child = child->NextSibling()) {
child->Draw(drawingEngine, effectiveClipping,
windowContentClipping, deep);
}
}
}