C++ BView::IsHidden方法代码示例

void TMediaTabView::ActivateView(EChildID which)
{
	// Give the view the control buttons
	BView* view = ChildAt(which);

	BPoint pt = view->Bounds().LeftBottom();
	// Get the target button position. Slightly different for the
	// different view types.
	if (which == kElementsView)
		pt.y -= kScrollHeight;
	else {
		pt.x++;
		pt.y -= kScrollHeight + 1;
	}

	for (int i = 0; i < 3; i++) {
		view->AddChild(fbuttons[i]);
		fbuttons[i]->MoveTo(pt);
		pt.x += kScrollHeight;
	}

	// Make sure it is visible
	if (view->IsHidden())
		view->Show();
}

void MainView::ToggleFields(bool on)
{
	Field *child = NULL;
   	BView *field = NULL;

	child = (Field *)ChildAt(0);
    while(child) {
		field = child->GetField();
                
        if(on) {
           	if(field->IsHidden()) field->Show();
  		}
        else {
			if(!field->IsHidden()) field->Hide();
		}
  		child = (Field *)child->NextSibling();
	}
}

void
PairsView::CreateGameBoard()
{
	// Show hidden buttons
	for (int32 i = 0; i < CountChildren(); i++) {
		BView* child = ChildAt(i);
		if (child->IsHidden())
			child->Show();
	}
	_GenerateCardPos();
}

void
BPrintJob::_RecurseView(BView* view, BPoint origin, BPicture* picture,
	BRect rect)
{
	ASSERT(picture != NULL);

	BRegion region;
	region.Set(BRect(rect.left, rect.top, rect.right, rect.bottom));
	view->fState->print_rect = rect;

	view->AppendToPicture(picture);
	view->PushState();
	view->SetOrigin(origin);
	view->ConstrainClippingRegion(&region);

	if (view->ViewColor() != B_TRANSPARENT_COLOR) {
		rgb_color highColor = view->HighColor();
		view->SetHighColor(view->ViewColor());
		view->FillRect(rect);
		view->SetHighColor(highColor);
	}

	view->fIsPrinting = true;
	view->Draw(rect);
	view->fIsPrinting = false;

	view->PopState();
	view->EndPicture();

	BView* child = view->ChildAt(0);
	while (child != NULL) {
		if ((child->Flags() & B_WILL_DRAW) && !child->IsHidden()) {
			BPoint leftTop(view->Bounds().LeftTop() + child->Frame().LeftTop());
			BRect printRect(rect.OffsetToCopy(rect.LeftTop() - leftTop)
				& child->Bounds());
			if (printRect.IsValid())
				_RecurseView(child, origin + leftTop, picture, printRect);
		}
		child = child->NextSibling();
	}

	if ((view->Flags() & B_DRAW_ON_CHILDREN) != 0) {
		view->AppendToPicture(picture);
		view->PushState();
		view->SetOrigin(origin);
		view->ConstrainClippingRegion(&region);
		view->fIsPrinting = true;
		view->DrawAfterChildren(rect);
		view->fIsPrinting = false;
		view->PopState();
		view->EndPicture();
	}
}

void TMediaTabView::DeactivateView(EChildID which)
{
	// Take away the control buttons
	BView* view = ChildAt(which);

	BView* b = view->ChildAt(0);
	while (b) {
		BView* next = b->NextSibling();
		if (dynamic_cast<TRadioBitmapButton*>(b) != 0)
			view->RemoveChild(b);
		b = next;
	}

	// Make sure the view is invisible
	if (!view->IsHidden())
		view->Hide();
}

void ArpConfigurePanel::GetPreferredSize(float* width, float* height)
{
	float maxw=0, maxh=0;
	size_t i;
	
	// Get dimensions of all configuration views.
	for( i=0; i<mConfigViews->size(); i++ ) {
		BView* view = 0;
		if( (view=mConfigViews->at(i)) != 0 ) {
			ArpD(cdb << ADH << "Processing dimens for view #" << i
							<< ", name="
							<< view->Name() << endl);
			float vwidth=0, vheight=0;
			// If this view is not attached to the window (i.e., it
			// is not currently displayed by the tab view), then it
			// may not be able to report correct dimensions.  To fix
			// this, we temporarily add it to your view.
			if( !view->Window() ) {
				ArpD(cdb << ADH << "Temporarily attaching view to window."
							<< endl);
				bool hidden = view->IsHidden();
				view->Hide();
				AddChild(view);
				view->GetPreferredSize(&vwidth, &vheight);
				RemoveChild(view);
				if( !hidden ) view->Show();
			} else {
				view->GetPreferredSize(&vwidth, &vheight);
			}
			ArpD(cdb << ADH << "Preferred width=" << vwidth
							<< ", height=" << vheight << endl);
			if( vwidth > maxw ) maxw = vwidth;
			if( vheight > maxh ) maxh = vheight;
		}
	}
	
	ArpD(cdb << ADH << "Final size=(" << (maxw+mTabWidth)
				<< ", " << (maxh+mTabHeight) << ")" << endl);
				
	if( width ) *width = maxw + mTabWidth + 2;
	if( height ) *height = maxh + mTabHeight + 2;
}