C++ BView::Hide方法代码示例

void TMediaTabView::Init()
{
	// NOTE: the order of these need to be kept in sync with the EChildID
	// enum

	// Create List View button
	BBitmap* up = GetIcon16FromResource("ListViewUp");
	BBitmap* down = GetIcon16FromResource("ListViewDown");
	// Make sure the button is a square, the same width as the scroll bar,
	// is high. It's top is one scroll bar height away from the bottom
	BRect buttBounds(0, 0, kScrollHeight, kScrollHeight);
	fbuttons[0] = new TRadioBitmapButton(buttBounds, "ListViewButton", up, down, this,
	                                     new BMessage(MEDIA_TAB_LIST_VIEW_MSG),
	                                     B_FOLLOW_LEFT + B_FOLLOW_BOTTOM);
	// This button is on by default
	fbuttons[0]->SetValue(1);

	// The Thumbnail button goes right next door
	up   = GetIcon16FromResource("ThumbnailUp");
	down = GetIcon16FromResource("ThumbnailDown");
	buttBounds.left = buttBounds.right;
	buttBounds.right = buttBounds.left + kScrollHeight;
	fbuttons[1] = new TRadioBitmapButton(buttBounds, "ThumbnailButton", up, down,
	                                     this, new BMessage(MEDIA_TAB_THUMBNAIL_VIEW_MSG), B_FOLLOW_LEFT +
	                                     B_FOLLOW_BOTTOM);

	// With the icon view button next
	up = GetIcon16FromResource("IconViewUp");
	down = GetIcon16FromResource("IconViewDown");
	buttBounds.left = buttBounds.right;
	buttBounds.right = buttBounds.left + kScrollHeight;
	fbuttons[2] = new TRadioBitmapButton(buttBounds, "IconViewButton", up, down,
	                                     this, new BMessage(MEDIA_TAB_ICON_VIEW_MSG), B_FOLLOW_LEFT +
	                                     B_FOLLOW_BOTTOM);

	// create the views needed to support list, thumbnail and icon view.
	// Tell it to make room for the buttons. Hide the non-default views
	TElementsView* e = new TElementsView(Bounds());
	AddChild(e);

	// move the horizontal scroll bar to make room for our buttons. NOTE: add
	// in one. The bitmap buttons are allowed to overlap so there is just one
	// black pixel shared between them. But the scroll bar changes color. It
	// needs to not share the space.
	e->MakeRoomForButtons(3 * kScrollHeight + 1);
	// Default view is list view
	ActivateView(kElementsView);

	// Do the other two views
	BView* sizeScroll = AddSizeScrollChild(new TThumbnailView(Bounds()));
	sizeScroll->Hide();

	sizeScroll = AddSizeScrollChild(new TIconView(Bounds()));
	sizeScroll->Hide();
}

void CollapsableBox::SetValue(int32 new_value)
{
	if (new_value != Value()) {
		BRect r = Bounds();
		
		if (!new_value)
			ResizeTo(r.Width(), m_collapsed_rect.Height());
		else
			ResizeTo(r.Width(), m_expanded_rect.Height());
		
		BView *child;
		
		child = ChildAt(0);
		while (child) {
			if (new_value)
				child->Show();
			else
				child->Hide();
			child = child->NextSibling();
		};
			
		Invalidate();
		BControl::SetValue(new_value);
		Invoke();
	};
	
}

void YabTabView::Select(int32 index)
{
        if (index < 0 || index >= CountTabs())
                index = Selection();

        BView *tab = TabAt(Selection());
        if (tab)
	{
		Invalidate();
		tab->Hide();
	}

        tab = TabAt(index);
        if (tab) 
	{
			if (index != 0 && !Bounds().Contains(TabFrame(index))){
		if (!Bounds().Contains(TabFrame(index).LeftTop()))
			fTabOffset += TabFrame(index).left - Bounds().left - 20.0f;
		else
			fTabOffset += TabFrame(index).right - Bounds().right + 20.0f;
			}


		Invalidate();
                tab->Show();
                fSelection = index;
                FocusChanged = index+1;
        }

}

BView* HTabSheet::AddSheet(const char *name, const char *desc)
{
	BView *r = new HDlogView(ClientArea(), name);
	AddChild(r);
	fPanes.AddItem(r);
	fEntries->AddItem(new BStringItem(name));
	fDescs.AddItem(desc ? strdup(desc) : strdup(name));

	if (fPanes.CountItems() > 1)
		r->Hide();
	else
		fEntries->Select(0);

	return r;
} /* HTabSheet::AddSheet */

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 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
TFilePanel::RestoreState()
{
	BNode defaultingNode;
	if (DefaultStateSourceNode(kDefaultFilePanelTemplate, &defaultingNode,
			false)) {
		AttributeStreamFileNode streamNodeSource(&defaultingNode);
		RestoreWindowState(&streamNodeSource);
		PoseView()->Init(&streamNodeSource);
	} else {
		RestoreWindowState(NULL);
		PoseView()->Init(NULL);
	}

	// Finish UI creation now that the PoseView is initialized
	BLayoutItem* item
		= fBorderedView->GroupLayout()->AddView(0, fPoseView->TitleView());
	BSize minSize = item->MinSize();
	BSize maxSize = item->MaxSize();
	item->SetExplicitMinSize(BSize(minSize.Width(), kTitleViewHeight));
	item->SetExplicitMaxSize(BSize(maxSize.Width(), kTitleViewHeight));

	BRect rect(fBorderedView->Frame());
	rect.right = rect.left + kCountViewWidth;
	rect.top = rect.bottom + 1;
	rect.bottom = rect.top + PoseView()->HScrollBar()->Bounds().Height() - 1;
	PoseView()->CountView()->MoveTo(rect.LeftTop());
	PoseView()->CountView()->ResizeTo(rect.Size());
	PoseView()->CountView()->SetResizingMode(B_FOLLOW_LEFT | B_FOLLOW_BOTTOM);
	fBackView->AddChild(PoseView()->CountView(), fBorderedView);

	PoseView()->HScrollBar()->MoveBy(kCountViewWidth + 1, 0);
	PoseView()->HScrollBar()->ResizeBy(-kCountViewWidth - 1, 0);

	// The Be Book states that the BTitleView will have a name of "TitleView",
	// and so some apps will try to grab it by that name and move it around.
	// They don't need to, because resizing "PoseView" (really the BorderedView)
	// will resize the BTitleView as well. So just create a dummy view here
	// so that they don't get NULL when trying to find the view.
	BView* dummyTitleView = new BView(BRect(), "TitleView", B_FOLLOW_NONE, 0);
	fBackView->AddChild(dummyTitleView);
	dummyTitleView->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;
}