C++ BButton::StringWidth方法代码示例

void
TFilePanel::SetButtonLabel(file_panel_button selector, const char* text)
{
	switch (selector) {
		case B_CANCEL_BUTTON:
			{
				BButton* button
					= dynamic_cast<BButton*>(FindView("cancel button"));
				if (button == NULL)
					break;

				float old_width = button->StringWidth(button->Label());
				button->SetLabel(text);
				float delta = old_width - button->StringWidth(text);
				if (delta) {
					button->MoveBy(delta, 0);
					button->ResizeBy(-delta, 0);
				}
			}
			break;

		case B_DEFAULT_BUTTON:
			{
				fButtonText = text;
				float delta = 0;
				BButton* button
					= dynamic_cast<BButton*>(FindView("default button"));
				if (button != NULL) {
					float old_width = button->StringWidth(button->Label());
					button->SetLabel(text);
					delta = old_width - button->StringWidth(text);
					if (delta) {
						button->MoveBy(delta, 0);
						button->ResizeBy(-delta, 0);
					}
				}

				// now must move cancel button
				button = dynamic_cast<BButton*>(FindView("cancel button"));
				if (button != NULL)
					button->MoveBy(delta, 0);
			}
			break;
	}
}

BButton*
ScreenWindow::_CreateColumnRowButton(bool columns, bool plus)
{
	BMessage* message = new BMessage(kMsgWorkspaceLayoutChanged);
	message->AddInt32("delta_x", columns ? (plus ? 1 : -1) : 0);
	message->AddInt32("delta_y", !columns ? (plus ? 1 : -1) : 0);

	BButton* button = new BButton(plus ? "+" : "-", message);
	button->SetFontSize(be_plain_font->Size() * 0.9);

	BSize size = button->MinSize();
	size.width = button->StringWidth("+") + 16;
	button->SetExplicitMinSize(size);
	button->SetExplicitMaxSize(size);

	fWorkspacesButtons[(columns ? 0 : 2) + (plus ? 1 : 0)] = button;
	return button;
}

FileTypesWindow::FileTypesWindow(const BMessage& settings)
	: BWindow(_Frame(settings), "FileTypes", B_TITLED_WINDOW,
		B_NOT_ZOOMABLE | B_ASYNCHRONOUS_CONTROLS),
	fNewTypeWindow(NULL)
{
	bool showIcons;
	bool showRule;
	if (settings.FindBool("show_icons", &showIcons) != B_OK)
		showIcons = true;
	if (settings.FindBool("show_rule", &showRule) != B_OK)
		showRule = false;

	// add the menu

	BMenuBar* menuBar = new BMenuBar(BRect(0, 0, 0, 0), NULL);
	AddChild(menuBar);

	BMenu* menu = new BMenu("File");
	BMenuItem* item;
	menu->AddItem(item = new BMenuItem("New resource file" B_UTF8_ELLIPSIS,
		NULL, 'N', B_COMMAND_KEY));
	item->SetEnabled(false);

	BMenu* recentsMenu = BRecentFilesList::NewFileListMenu("Open" B_UTF8_ELLIPSIS,
		NULL, NULL, be_app, 10, false, NULL, kSignature);
	item = new BMenuItem(recentsMenu, new BMessage(kMsgOpenFilePanel));
	item->SetShortcut('O', B_COMMAND_KEY);
	menu->AddItem(item);
	menu->AddItem(new BMenuItem("Application types" B_UTF8_ELLIPSIS,
		new BMessage(kMsgOpenApplicationTypesWindow)));
	menu->AddSeparatorItem();

	menu->AddItem(new BMenuItem("About FileTypes" B_UTF8_ELLIPSIS,
		new BMessage(B_ABOUT_REQUESTED)));
	menu->AddSeparatorItem();

	menu->AddItem(new BMenuItem("Quit", new BMessage(B_QUIT_REQUESTED),
		'Q', B_COMMAND_KEY));
	menu->SetTargetForItems(be_app);
	menuBar->AddItem(menu);

	menu = new BMenu("Settings");
	item = new BMenuItem("Show icons in list", new BMessage(kMsgToggleIcons));
	item->SetMarked(showIcons);
	item->SetTarget(this);
	menu->AddItem(item);

	item = new BMenuItem("Show recognition rule", new BMessage(kMsgToggleRule));
	item->SetMarked(showRule);
	item->SetTarget(this);
	menu->AddItem(item);
	menuBar->AddItem(menu);

	// MIME Types list

	BRect rect = Bounds();
	rect.top = menuBar->Bounds().Height() + 1.0f;
	BView* topView = new BView(rect, NULL, B_FOLLOW_ALL, B_WILL_DRAW);
	topView->SetViewColor(ui_color(B_PANEL_BACKGROUND_COLOR));
	AddChild(topView);

	BButton* button = new BButton(rect, "add", "Add" B_UTF8_ELLIPSIS,
		new BMessage(kMsgAddType), B_FOLLOW_BOTTOM);
	button->ResizeToPreferred();
	button->MoveTo(8.0f, topView->Bounds().bottom - 8.0f - button->Bounds().Height());
	topView->AddChild(button);

	rect = button->Frame();
	rect.OffsetBy(rect.Width() + 8.0f, 0.0f);
	fRemoveTypeButton = new BButton(rect, "remove", "Remove",
		new BMessage(kMsgRemoveType), B_FOLLOW_BOTTOM);
	fRemoveTypeButton->ResizeToPreferred();
	topView->AddChild(fRemoveTypeButton);

	rect.bottom = rect.top - 10.0f;
	rect.top = 10.0f;
	rect.left = 10.0f;
	rect.right -= B_V_SCROLL_BAR_WIDTH + 2.0f;
	if (rect.right < 180)
		rect.right = 180;

	fTypeListView = new MimeTypeListView(rect, "typeview", NULL, showIcons, false,
		B_FOLLOW_LEFT | B_FOLLOW_TOP_BOTTOM);
	fTypeListView->SetSelectionMessage(new BMessage(kMsgTypeSelected));

	BScrollView* scrollView = new BScrollView("scrollview", fTypeListView,
		B_FOLLOW_LEFT | B_FOLLOW_TOP_BOTTOM, B_FRAME_EVENTS | B_WILL_DRAW, false, true);
	topView->AddChild(scrollView);

	// "Icon" group

	font_height plainHeight;
	be_plain_font->GetHeight(&plainHeight);
	float height = ceilf(plainHeight.ascent + plainHeight.descent
		+ plainHeight.leading) + 2.0f;

	BFont font(be_bold_font);
	float labelWidth = font.StringWidth("Icon");
	font_height boldHeight;
	font.GetHeight(&boldHeight);
//.........这里部分代码省略.........