C++ BTextView::LineWidth方法代码示例

void
DTipWatcherView::ShowTip(BPoint pt, const char *text)
{
	if (!text)
		return;
	
	Window()->SetWorkspaces(B_CURRENT_WORKSPACE);
	
	fTipView->SetText(text);
	
	// Figure the size of the tip. We do have a maximum width of 200 and a maximum height of 400, but
	// we only want to use the maximum size if it's necessary.
	fTipView->ResizeTo(200,400);
	fTipView->SetTextRect(BRect(2,2,198,398));
	
	int32 lineCount = fTipView->CountLines();
	float width = 200.0;
	
	if (lineCount == 1)
		width = fTipView->LineWidth() + 4;
	
	float height = fTipView->TextHeight(0,lineCount);
	height = (height < 400) ? height : 400;
	Window()->ResizeTo(width,height);
	
	fTipView->SetTextRect(BRect(2,2, width - 4, height - 4));
	
	BPoint winpt = PointForTip(pt);
	Window()->MoveTo(winpt.x,winpt.y);
	Window()->Show();
}

void ArpTextControl::FrameResized(float new_width, float new_height)
{
	ArpD(cdb << ADH << "ArpTextControl: FrameResized(" << new_width
			<< ", " << new_height << ")" << endl);
	BTextView* text = dynamic_cast<BTextView*>(ChildAt(0));
	if( !text ) ArpD(cdb << ADH << "!!! No BTextView !!!" << endl);
	if( text ) {
		ArpD(cdb << ADH << "BTextView: Initial Bounds=" << text->Bounds()
			<< ", TextRect=" << text->TextRect() << endl);
	}
	BTextControl::FrameResized(new_width, new_height);
	BRect textBounds(text->Bounds());
	BRect textRect(text->TextRect());
	textRect.right = textRect.left + text->LineWidth(0)-1;
	if( textRect.Width() < textBounds.Width() ) {
		textRect.right = textRect.left + textBounds.Width()-1;
	}
	text->SetTextRect(textRect);
	if( text ) {
		ArpD(cdb << ADH << "BTextView: Finish Bounds=" << text->Bounds()
			<< ", TextRect=" << text->TextRect() << endl);
	}
}

SGIView::SGIView(const char* name, uint32 flags, TranslatorSettings* settings)
	:
	BView(name, flags, new BGroupLayout(B_VERTICAL)),
	fSettings(settings)
{
	BPopUpMenu* menu = new BPopUpMenu("pick compression");

	uint32 currentCompression = 
		fSettings->SetGetInt32(SGI_SETTING_COMPRESSION);
	// create the menu items with the various compression methods
	add_menu_item(menu, SGI_COMP_NONE, B_TRANSLATE("None"), 
		currentCompression);
	//menu->AddSeparatorItem();
	add_menu_item(menu, SGI_COMP_RLE, B_TRANSLATE("RLE"), currentCompression);

	// DON'T turn this on, it's so slow that I didn't wait long enough
	// the one time I tested this. So I don't know if the code even works.
	// Supposedly, this would look for an already written scanline, and
	// modify the scanline tables so that the current row is not written
	// at all...

	//add_menu_item(menu, SGI_COMP_ARLE, "Agressive RLE", currentCompression);

	fCompressionMF = new BMenuField("compression", 
		B_TRANSLATE("Use compression:"), menu);

	BAlignment labelAlignment(B_ALIGN_LEFT, B_ALIGN_NO_VERTICAL);

	BStringView* titleView = new BStringView("title", 
		B_TRANSLATE("SGI image translator"));
	titleView->SetFont(be_bold_font);
	titleView->SetExplicitAlignment(labelAlignment);

	char detail[100];
	sprintf(detail, B_TRANSLATE("Version %d.%d.%d %s"),
		static_cast<int>(B_TRANSLATION_MAJOR_VERSION(SGI_TRANSLATOR_VERSION)),
		static_cast<int>(B_TRANSLATION_MINOR_VERSION(SGI_TRANSLATOR_VERSION)),
		static_cast<int>(B_TRANSLATION_REVISION_VERSION(
			SGI_TRANSLATOR_VERSION)), __DATE__);
	BStringView* detailView = new BStringView("details", detail);
	detailView->SetExplicitAlignment(labelAlignment);

	BTextView* infoView = new BTextView("info");
	infoView->SetText(BString(B_TRANSLATE("written by:\n"))
			.Append(author)
			.Append(B_TRANSLATE("\n\nbased on GIMP SGI plugin v1.5:\n"))
			.Append(kSGICopyright).String());
	infoView->SetExplicitAlignment(labelAlignment);
	infoView->SetWordWrap(false);
	infoView->MakeEditable(false);
	infoView->MakeResizable(true);
	infoView->SetViewColor(ui_color(B_PANEL_BACKGROUND_COLOR));

	float padding = 5.0f;
	BLayoutBuilder::Group<>(this, B_VERTICAL, padding)
		.SetInsets(padding)
		.Add(titleView)
		.Add(detailView)
		.AddGroup(B_HORIZONTAL)
			.Add(fCompressionMF)
			.AddGlue()
			.End()
		.Add(infoView)
		.AddGlue();

	BFont font;
	GetFont(&font);
	SetExplicitPreferredSize(BSize((font.Size() * 390) / 12,
		(font.Size() * 180) / 12));

	// TODO: remove this workaround for ticket #4217
	infoView->SetExplicitPreferredSize(
		BSize(infoView->LineWidth(4), infoView->TextHeight(0, 80)));
	infoView->SetExplicitMaxSize(infoView->ExplicitPreferredSize());
	infoView->SetExplicitMinSize(infoView->ExplicitPreferredSize());
}

void
BTextWidget::StartEdit(BRect bounds, BPoseView *view, BPose *pose)
{
	if (!IsEditable())
		return;

	// don't allow editing of the trash directory name
	if (pose->TargetModel()->IsTrash())
		return;

	// don't allow editing of the "Disks" icon name
	if (pose->TargetModel()->IsRoot())
		return;

	BEntry entry(pose->TargetModel()->EntryRef());
	if (entry.InitCheck() == B_OK 
		&& !ConfirmChangeIfWellKnownDirectory(&entry, "rename"))
		return;

	// get bounds with full text length
	BRect rect(bounds);
	BRect textRect(bounds);
	rect.OffsetBy(-2, -1);
	rect.right += 1;

	BFont font;
	view->GetFont(&font);
	BTextView *textView = new BTextView(rect, "WidgetTextView", textRect, &font, 0,
		B_FOLLOW_ALL, B_WILL_DRAW);

	textView->SetWordWrap(false);
	DisallowMetaKeys(textView);
	fText->SetUpEditing(textView);

	textView->AddFilter(new BMessageFilter(B_KEY_DOWN, TextViewFilter));

	rect.right = rect.left + textView->LineWidth() + 3;
	// center new width, if necessary
	if (view->ViewMode() == kIconMode
		|| (view->ViewMode() == kListMode && fAlignment == B_ALIGN_CENTER)) {
		rect.OffsetBy(bounds.Width() / 2 - rect.Width() / 2, 0);
	}

	rect.bottom = rect.top + textView->LineHeight() + 1;
	textRect = rect.OffsetToCopy(2, 1);
	textRect.right -= 3;
	textRect.bottom--;
	textView->SetTextRect(textRect);

	textRect = view->Bounds();
	bool hitBorder = false;
	if (rect.left < 1)
		rect.left = 1, hitBorder = true;
	if (rect.right > textRect.right)
		rect.right = textRect.right - 2, hitBorder = true;

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

	BScrollView *scrollView = new BScrollView("BorderView", textView, 0, 0, false,
		false, B_PLAIN_BORDER);
	view->AddChild(scrollView);

	// configure text view
	switch (view->ViewMode()) {
		case kIconMode:
			textView->SetAlignment(B_ALIGN_CENTER);
			break;

		case kMiniIconMode:
			textView->SetAlignment(B_ALIGN_LEFT);
			break;

		case kListMode:
			textView->SetAlignment(fAlignment);
			break;
	}
	textView->MakeResizable(true, hitBorder ? NULL : scrollView);

	view->SetActivePose(pose);		// tell view about pose
	SetActive(true);				// for widget

	textView->SelectAll();
	textView->MakeFocus();

	// make this text widget invisible while we edit it
	SetVisible(false);

	ASSERT(view->Window());	// how can I not have a Window here???

	if (view->Window())
		// force immediate redraw so TextView appears instantly
		view->Window()->UpdateIfNeeded();
}

void
BTextWidget::StartEdit(BRect bounds, BPoseView* view, BPose* pose)
{
	view->SetTextWidgetToCheck(NULL, this);
	if (!IsEditable() || IsActive())
		return;

	BEntry entry(pose->TargetModel()->EntryRef());
	if (entry.InitCheck() == B_OK
		&& !ConfirmChangeIfWellKnownDirectory(&entry,
			B_TRANSLATE_COMMENT("rename",
				"As in 'if you rename this folder...' (en) "
				"'Wird dieser Ordner umbenannt...' (de)"),
			B_TRANSLATE_COMMENT("rename",
				"As in 'to rename this folder...' (en) "
				"'Um diesen Ordner umzubenennen...' (de)"),
			B_TRANSLATE_COMMENT("Rename",
				"Button label, 'Rename' (en), 'Umbenennen' (de)")))
		return;

	// get bounds with full text length
	BRect rect(bounds);
	BRect textRect(bounds);
	rect.OffsetBy(-2, -1);
	rect.right += 1;

	BFont font;
	view->GetFont(&font);
	BTextView* textView = new BTextView(rect, "WidgetTextView", textRect,
		&font, 0, B_FOLLOW_ALL, B_WILL_DRAW);

	textView->SetWordWrap(false);
	DisallowMetaKeys(textView);
	fText->SetUpEditing(textView);

	textView->AddFilter(new BMessageFilter(B_KEY_DOWN, TextViewFilter));

	rect.right = rect.left + textView->LineWidth() + 3;
	// center new width, if necessary
	if (view->ViewMode() == kIconMode
		|| (view->ViewMode() == kListMode && fAlignment == B_ALIGN_CENTER)) {
		rect.OffsetBy(bounds.Width() / 2 - rect.Width() / 2, 0);
	}

	rect.bottom = rect.top + textView->LineHeight() + 1;
	textRect = rect.OffsetToCopy(2, 1);
	textRect.right -= 3;
	textRect.bottom--;
	textView->SetTextRect(textRect);

	BPoint origin = view->LeftTop();
	textRect = view->Bounds();

	bool hitBorder = false;
	if (rect.left <= origin.x)
		rect.left = origin.x + 1, hitBorder = true;
	if (rect.right >= textRect.right)
		rect.right = textRect.right - 1, hitBorder = true;

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

	BScrollView* scrollView = new BScrollView("BorderView", textView, 0, 0,
		false, false, B_PLAIN_BORDER);
	view->AddChild(scrollView);

	// configure text view
	switch (view->ViewMode()) {
		case kIconMode:
			textView->SetAlignment(B_ALIGN_CENTER);
			break;

		case kMiniIconMode:
			textView->SetAlignment(B_ALIGN_LEFT);
			break;

		case kListMode:
			textView->SetAlignment(fAlignment);
			break;
	}
	textView->MakeResizable(true, hitBorder ? NULL : scrollView);

	view->SetActivePose(pose);
		// tell view about pose
	SetActive(true);
		// for widget

	textView->SelectAll();
	textView->MakeFocus();

	// make this text widget invisible while we edit it
	SetVisible(false);

	ASSERT(view->Window() != NULL);
		// how can I not have a Window here???

	if (view->Window()) {
		// force immediate redraw so TextView appears instantly
		view->Window()->UpdateIfNeeded();
	}
//.........这里部分代码省略.........