C++ BRect::Size方法代码示例

// AlignInFrame
void
BLayoutUtils::AlignInFrame(BView* view, BRect frame)
{
 	BSize maxSize = view->MaxSize();
 	BAlignment alignment = view->LayoutAlignment();
 
 	if (view->HasHeightForWidth()) {
 		// The view has height for width, so we do the horizontal alignment
 		// ourselves and restrict the height max constraint respectively.
 
 		if (maxSize.width < frame.Width()
 			&& alignment.horizontal != B_ALIGN_USE_FULL_WIDTH) {
 			frame.OffsetBy(floor((frame.Width() - maxSize.width)
 				* alignment.RelativeHorizontal()), 0);
 			frame.right = frame.left + maxSize.width;
 		}
 		alignment.horizontal = B_ALIGN_USE_FULL_WIDTH;
 
 		float minHeight;
 		float maxHeight;
 		float preferredHeight;
 		view->GetHeightForWidth(frame.Width(), &minHeight, &maxHeight,
 			&preferredHeight);
 		
 		frame.bottom = frame.top + max_c(frame.Height(), minHeight);
 		maxSize.height = minHeight;
 	}
 
 	frame = AlignInFrame(frame, maxSize, alignment);
 	view->MoveTo(frame.LeftTop());
 	view->ResizeTo(frame.Size());
}

void
PictureView::Draw(BRect updateRect)
{
	BRect rect = Bounds();

	// Draw the outer frame
	rgb_color base = ui_color(B_PANEL_BACKGROUND_COLOR);
	if (IsFocus() && Window() && Window()->IsActive())
		SetHighColor(ui_color(B_KEYBOARD_NAVIGATION_COLOR));
	else
		SetHighColor(tint_color(base, B_DARKEN_3_TINT));
	StrokeRect(rect);

	if (fFocusChanging) {
		// focus frame is already redraw, stop here
		return;
	}

	BBitmap* picture = fPicture ? fPicture : fDefaultPicture;
	if (picture != NULL) {
		// scale to fit and center picture in frame
		BRect frame = rect.InsetByCopy(kPictureMargin, kPictureMargin);
		BRect srcRect = picture->Bounds();
		BSize size = frame.Size();
		if (srcRect.Width() > srcRect.Height())
			size.height = srcRect.Height() * size.width / srcRect.Width();
		else
			size.width = srcRect.Width() * size.height / srcRect.Height();

		fPictureRect = BLayoutUtils::AlignInFrame(frame, size,
			BAlignment(B_ALIGN_HORIZONTAL_CENTER, B_ALIGN_VERTICAL_CENTER));

		SetDrawingMode(B_OP_ALPHA);
		if (picture == fDefaultPicture) {
			SetBlendingMode(B_CONSTANT_ALPHA, B_ALPHA_OVERLAY);
			SetHighColor(0, 0, 0, 24);
		}

 		DrawBitmapAsync(picture, srcRect, fPictureRect,
 			B_FILTER_BITMAP_BILINEAR);

		SetDrawingMode(B_OP_OVER);
	}
}

//.........这里部分代码省略.........
			break;
		}
		case MSG_ADD_SLOT: {
			LaunchButton* button;
			if (message->FindPointer("be:source", (void**)&button) >= B_OK) {
				fPadView->AddButton(new LaunchButton("launch button",
					NULL, new BMessage(MSG_LAUNCH)), button);
			}
			break;
		}
		case MSG_CLEAR_SLOT: {
			LaunchButton* button;
			if (message->FindPointer("be:source", (void**)&button) >= B_OK)
				button->SetTo((entry_ref*)NULL);
			break;
		}
		case MSG_REMOVE_SLOT: {
			LaunchButton* button;
			if (message->FindPointer("be:source", (void**)&button) >= B_OK) {
				if (fPadView->RemoveButton(button))
					delete button;
			}
			break;
		}
		case MSG_SET_DESCRIPTION: {
			LaunchButton* button;
			if (message->FindPointer("be:source", (void**)&button) >= B_OK) {
				const char* name;
				if (message->FindString("name", &name) >= B_OK) {
					// message comes from a previous name panel
					button->SetDescription(name);
					BRect namePanelFrame;
					if (message->FindRect("frame", &namePanelFrame) == B_OK) {
						((App*)be_app)->SetNamePanelSize(
							namePanelFrame.Size());
					}
				} else {
					// message comes from pad view
					entry_ref* ref = button->Ref();
					if (ref) {
						BString helper(B_TRANSLATE("Description for '%3'"));
						helper.ReplaceFirst("%3", ref->name);
						// Place the name panel besides the pad, but give it
						// the user configured size.
						BPoint origin = B_ORIGIN;
						BSize size = ((App*)be_app)->NamePanelSize();
						NamePanel* panel = new NamePanel(helper.String(),
							button->Description(), this, this,
							new BMessage(*message), size);
						panel->Layout(true);
						size = panel->Frame().Size();
						BScreen screen(this);
						BPoint mousePos;
						uint32 buttons;
						fPadView->GetMouse(&mousePos, &buttons, false);
						fPadView->ConvertToScreen(&mousePos);
						if (fPadView->Orientation() == B_HORIZONTAL) {
							// Place above or below the pad
							origin.x = mousePos.x - size.width / 2;
							if (screen.Frame().bottom - Frame().bottom
									> size.height + 20) {
								origin.y = Frame().bottom + 10;
							} else {
								origin.y = Frame().top - 10 - size.height;
							}
						} else {

void
TFilePanel::Init(const BMessage*)
{
	BRect windRect(Bounds());
	fBackView = new BView(Bounds(), "View", B_FOLLOW_ALL, 0);
	fBackView->SetViewUIColor(B_PANEL_BACKGROUND_COLOR);
	AddChild(fBackView);

	// add poseview menu bar
	fMenuBar = new BMenuBar(BRect(0, 0, windRect.Width(), 1), "MenuBar");
	fMenuBar->SetBorder(B_BORDER_FRAME);
	fBackView->AddChild(fMenuBar);

	// add directory menu and menufield
	fDirMenu = new BDirMenu(0, this, kSwitchDirectory, "refs");

	font_height ht;
	be_plain_font->GetHeight(&ht);
	float f_height = ht.ascent + ht.descent + ht.leading;

	BRect rect;
	rect.top = fMenuBar->Bounds().Height() + 8;
	rect.left = windRect.left + 8;
	rect.right = rect.left + 300;
	rect.bottom = rect.top + (f_height > 22 ? f_height : 22);

	fDirMenuField = new BMenuField(rect, "DirMenuField", "", fDirMenu);
	fDirMenuField->MenuBar()->SetFont(be_plain_font);
	fDirMenuField->SetDivider(0);
	fDirMenuField->MenuBar()->SetMaxContentWidth(rect.Width() - 26.0f);
		// Make room for the icon

	fDirMenuField->MenuBar()->RemoveItem((int32)0);
	fDirMenu->SetMenuBar(fDirMenuField->MenuBar());
		// the above is a weird call from BDirMenu
		// ToDo: clean up

	BEntry entry(TargetModel()->EntryRef());
	if (entry.InitCheck() == B_OK)
		fDirMenu->Populate(&entry, 0, true, true, false, true);
	else
		fDirMenu->Populate(0, 0, true, true, false, true);

	fBackView->AddChild(fDirMenuField);

	// add file name text view
	if (fIsSavePanel) {
		BRect rect(windRect);
		rect.top = rect.bottom - 35;
		rect.left = 8;
		rect.right = rect.left + 170;
		rect.bottom = rect.top + 13;

		fTextControl = new BTextControl(rect, "text view",
			B_TRANSLATE("save text"), "", NULL,
			B_FOLLOW_LEFT | B_FOLLOW_BOTTOM);
		DisallowMetaKeys(fTextControl->TextView());
		DisallowFilenameKeys(fTextControl->TextView());
		fBackView->AddChild(fTextControl);
		fTextControl->SetDivider(0.0f);
		fTextControl->TextView()->SetMaxBytes(B_FILE_NAME_LENGTH - 1);

		fButtonText.SetTo(B_TRANSLATE("Save"));
	} else
		fButtonText.SetTo(B_TRANSLATE("Open"));

	// Add PoseView
	fBorderedView->SetName("PoseView");
	fBorderedView->SetResizingMode(B_FOLLOW_ALL);
	fBorderedView->EnableBorderHighlight(true);

	rect = windRect;
	rect.OffsetTo(10, fDirMenuField->Frame().bottom + 10);
	rect.bottom = windRect.bottom - 60;
	rect.right -= B_V_SCROLL_BAR_WIDTH + 20;
	fBorderedView->MoveTo(rect.LeftTop());
	fBorderedView->ResizeTo(rect.Width(), rect.Height());

	PoseView()->AddScrollBars();
	PoseView()->SetDragEnabled(false);
	PoseView()->SetDropEnabled(false);
	PoseView()->SetSelectionHandler(this);
	PoseView()->SetSelectionChangedHook(true);
	PoseView()->DisableSaveLocation();

	// horizontal
	rect = fBorderedView->Frame();
	rect.top = rect.bottom;
	rect.bottom = rect.top + (float)B_H_SCROLL_BAR_HEIGHT;
	PoseView()->HScrollBar()->MoveTo(rect.LeftTop());
	PoseView()->HScrollBar()->ResizeTo(rect.Size());
	PoseView()->HScrollBar()->SetResizingMode(B_FOLLOW_LEFT_RIGHT | B_FOLLOW_BOTTOM);
	fBackView->AddChild(PoseView()->HScrollBar());

	// vertical
	rect = fBorderedView->Frame();
	rect.left = rect.right;
	rect.right = rect.left + (float)B_V_SCROLL_BAR_WIDTH;
	PoseView()->VScrollBar()->MoveTo(rect.LeftTop());
	PoseView()->VScrollBar()->ResizeTo(rect.Size());
//.........这里部分代码省略.........