C++ BStringView::GetPreferredSize方法代码示例

void 
TSignatureView::AttachedToWindow()
{
	BRect	rect = Bounds();
	float	name_text_length = StringWidth(kNameText);
	float	sig_text_length = StringWidth(kSigText);
	float	divide_length;

	if (name_text_length > sig_text_length)
		divide_length = name_text_length;
	else
		divide_length = sig_text_length;

	rect.InsetBy(8,0);
	rect.top+= 8;
	
	fName = new TNameControl(rect, kNameText, new BMessage(NAME_FIELD));
	AddChild(fName);

	fName->SetDivider(divide_length + 10);
	fName->SetAlignment(B_ALIGN_RIGHT, B_ALIGN_LEFT);

	rect.OffsetBy(0,fName->Bounds().Height()+5);
	rect.bottom = rect.top + kSigHeight;
	rect.left = fName->TextView()->Frame().left;

	BRect text = rect;
	text.OffsetTo(10,0);
	fTextView = new TSigTextView(rect, text);
	BScrollView *scroller = new BScrollView("SigScroller", fTextView, B_FOLLOW_ALL, 0, false, true);
	AddChild(scroller);
	scroller->ResizeBy(-1 * scroller->ScrollBar(B_VERTICAL)->Frame().Width() - 9, 0);
	scroller->MoveBy(7,0);

	/* back up a bit to make room for the label */

	rect = scroller->Frame();
	BStringView *stringView = new BStringView(rect, "SigLabel", kSigText);
	AddChild(stringView);

	float tWidth, tHeight;
	stringView->GetPreferredSize(&tWidth, &tHeight);

	/* the 5 is for the spacer in the TextView */

	rect.OffsetBy(-1 *(tWidth) - 5, 0);
	rect.right = rect.left + tWidth;
	rect.bottom = rect.top + tHeight;

	stringView->MoveTo(rect.LeftTop());
	stringView->ResizeTo(rect.Width(), rect.Height());

	/* Resize the View to the correct height */
	scroller->SetResizingMode(B_FOLLOW_NONE);
	ResizeTo(Frame().Width(), scroller->Frame().bottom + 8);
	scroller->SetResizingMode(B_FOLLOW_ALL);
}

//.........这里部分代码省略.........
		const char *type = B_TRANSLATE("Unknown type");
		switch (fEditor.Type()) {
			case B_MINI_ICON_TYPE:
			case B_LARGE_ICON_TYPE:
#ifdef HAIKU_TARGET_PLATFORM_HAIKU
			case B_VECTOR_ICON_TYPE:
#endif
				type = B_TRANSLATE("Icon");
				break;
			case B_PNG_FORMAT:
				type = B_TRANSLATE("PNG format");
				break;
			case B_MESSAGE_TYPE:
				type = B_TRANSLATE("Flattened bitmap");
				break;
			default:
				break;
		}
		const char *colorSpace;
		switch (fBitmap->ColorSpace()) {
			case B_GRAY1:
			case B_GRAY8:
				colorSpace = B_TRANSLATE("Grayscale");
				break;
			case B_CMAP8:
				colorSpace = B_TRANSLATE("8 bit palette");
				break;
			case B_RGB32:
			case B_RGBA32:
			case B_RGB32_BIG:
			case B_RGBA32_BIG:
				colorSpace = B_TRANSLATE("32 bit");
				break;
			case B_RGB15:
			case B_RGBA15:
			case B_RGB15_BIG:
			case B_RGBA15_BIG:
				colorSpace = B_TRANSLATE("15 bit");
				break;
			case B_RGB16:
			case B_RGB16_BIG:
				colorSpace = B_TRANSLATE("16 bit");
				break;
			default:
				colorSpace = B_TRANSLATE("Unknown format");
				break;
		}
		snprintf(buffer, sizeof(buffer), "%s, %g x %g, %s", type,
			fBitmap->Bounds().Width() + 1, fBitmap->Bounds().Height() + 1, 
			colorSpace);
		fDescriptionView->SetText(buffer);
	} else
		fDescriptionView->SetText(B_TRANSLATE_COMMENT("Could not read image", 
			"Image means here a picture file, not a disk image."));

	// Update the view size to match the image and its description

	float width, height;
	fDescriptionView->GetPreferredSize(&width, &height);
	fDescriptionView->ResizeTo(width, height);

	BRect rect = fDescriptionView->Bounds();
	if (fBitmap != NULL) {
		BRect bounds = fBitmap->Bounds();
		rect.bottom += bounds.Height() + 5;

		if (fScaleSlider != NULL && rect.Width() < fScaleSlider->Bounds().Width())
			rect.right = fScaleSlider->Bounds().right;
		if (bounds.Width() > rect.Width())
			rect.right = bounds.right;

		// center description below the bitmap
		fDescriptionView->MoveTo((rect.Width() - fDescriptionView->Bounds().Width()) / 2,
			bounds.Height() + 5);

		if (fScaleSlider != NULL) {
			// center slider below description
			rect.bottom += fScaleSlider->Bounds().Height() + 5;
			fScaleSlider->MoveTo((rect.Width() - fScaleSlider->Bounds().Width()) / 2,
				fDescriptionView->Frame().bottom + 5);

			if (fScaleSlider->IsHidden())
				fScaleSlider->Show();
		}
	} else if (fScaleSlider != NULL && !fScaleSlider->IsHidden())
		fScaleSlider->Hide();

	ResizeTo(rect.Width(), rect.Height());
	if (Parent()) {
		// center within parent view
		BRect parentBounds = Parent()->Bounds();
		MoveTo((parentBounds.Width() - rect.Width()) / 2,
			(parentBounds.Height() - rect.Height()) / 2);
	}

	Invalidate();

	// restore old view size
	fEditor.SetViewSize(viewSize);
}

// --------------------------------------------------
JobSetupWindow::JobSetupWindow(BMessage *msg, const char * printerName)
	:	HWindow(BRect(0, 0, 320, 160), "Job Setup", B_TITLED_WINDOW_LOOK,
 			B_MODAL_APP_WINDOW_FEEL, B_NOT_RESIZABLE | B_NOT_MINIMIZABLE |
 			B_NOT_ZOOMABLE)
{
	fSetupMsg	= msg;
	fExitSem 	= create_sem(0, "JobSetup");
	fResult 	= B_ERROR;
	
	if (printerName) {
		BString	title;
		title << printerName << " Job Setup";
		SetTitle(title.String());
		fPrinterName = printerName;
	}
	
	// ---- Ok, build a default job setup user interface
	BRect			r;
	BBox			*panel;
	BBox			*line;
	BButton	 		*ok;
	BButton			*cancel;
	BStringView		*sv;
	float			x, y, w, h;
	float			indent;
	int32           copies;
	int32           firstPage;
	int32           lastPage;
	bool            allPages;
	char            buffer[80];
	
	// PrinterDriver ensures that property exists
	fSetupMsg->FindInt32("copies",     &copies);
	fSetupMsg->FindInt32("first_page", &firstPage);
	fSetupMsg->FindInt32("last_page",  &lastPage);
	BMessage doc_info;
	if (B_OK != fSetupMsg->FindMessage("doc_info", &doc_info)) {
		// default fields
		doc_info.AddString("Author", "");
		doc_info.AddString("Subject", "");
		doc_info.AddString("Keywords", "");
		fSetupMsg->AddMessage("doc_info", &doc_info);
	}
	AddFields(&fDocInfo, fSetupMsg, NULL, includeKeys);
	
	allPages = firstPage == 1 && lastPage == MAX_INT32;

	r = Bounds();

	// add a *dialog* background
	panel = new BBox(r, "top_panel", B_FOLLOW_ALL, 
		B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE_JUMP,
		B_PLAIN_BORDER);

	const int kMargin = 6;

	//const char *kCopiesLabel				= "Copies:";
	const char *kCopiesLabelExtraSpace		= "Copies:##";
	const char *kPagesRangeLabel			= "Pages:";
	const char *kAllPagesLabel				= "All";
	const char *kPagesRangeSelectionLabel	= "";
	const char *kFromLabel					= "From:";
	const char *kFromLabelExtraSpace		= "From:##";
	const char *kToLabel					= "To:";
	const char *kToLabelExtraSpace			= "To:##";

	r = panel->Bounds();

	x = r.left + kMargin;
	y = r.top + kMargin;
	
	
	// add a "copies" input field

/* Simon: temporarily removed this code
	sprintf(buffer, "%d", (int)copies);
	fCopies = new BTextControl(BRect(x, y, x+100, y+20), "copies", kCopiesLabel,
								buffer, new BMessage(NB_COPIES_MSG));
	fCopies->SetAlignment(B_ALIGN_LEFT, B_ALIGN_RIGHT);
	fCopies->ResizeToPreferred();
	fCopies->GetPreferredSize(&w, &h);
	panel->AddChild(fCopies);
	
	y += h + kMargin;	// "new line"
*/
	// add a "pages" label
	sv = new BStringView(BRect(x, y, x+100, y+20), "pages_range", kPagesRangeLabel);
	panel->AddChild(sv);
	sv->ResizeToPreferred();
	sv->GetPreferredSize(&w, &h);

	// align "copies" textcontrol field on the "allPages" radiobutton bellow...
	indent = be_plain_font->StringWidth(kCopiesLabelExtraSpace);
	w += kMargin;
	if ( w > indent )
		indent = w;
	// fCopies->SetDivider(indent);

	x += indent;
//.........这里部分代码省略.........