C++ BMenu::LowColor方法代码示例

void
TTeamMenuItem::DrawContentLabel()
{
	BMenu* menu = Menu();
	menu->MovePenBy(0, fLabelAscent);

	float cachedWidth = menu->StringWidth(Label());
	if (Submenu() && fVertical)
		cachedWidth += 18;

	const char* label = Label();
	char* truncLabel = NULL;
	float max = 0;

	if (fVertical && static_cast<TBarApp*>(be_app)->Settings()->superExpando)
		max = menu->MaxContentWidth() - kSwitchWidth;
	else
		max = menu->MaxContentWidth() - 4.0f;

	if (max > 0) {
		BPoint penloc = menu->PenLocation();
		BRect frame = Frame();
		float offset = penloc.x - frame.left;
		if (cachedWidth + offset > max) {
			truncLabel = (char*)malloc(strlen(label) + 4);
			if (!truncLabel)
				return;
			TruncateLabel(max-offset, truncLabel);
			label = truncLabel;
		}
	}

	if (!label)
		label = Label();

	TBarView* barview = (static_cast<TBarApp*>(be_app))->BarView();
	bool canHandle = !barview->Dragging()
		|| barview->AppCanHandleTypes(Signature());
	if (_IsSelected() && IsEnabled() && canHandle)
		menu->SetLowColor(tint_color(menu->LowColor(),
			B_HIGHLIGHT_BACKGROUND_TINT));
	else
		menu->SetLowColor(menu->LowColor());

	menu->DrawString(label);

	free(truncLabel);
}

void
TBarMenuTitle::Draw()
{
	BMenu* menu = Menu();
	if (menu == NULL)
		return;

	BRect frame(Frame());
	rgb_color base = menu->LowColor();

	menu->PushState();

	BRect windowBounds = menu->Window()->Bounds();
	if (frame.right > windowBounds.right)
		frame.right = windowBounds.right;

	// fill in background
	if (IsSelected()) {
		be_control_look->DrawMenuItemBackground(menu, frame, frame, base,
			BControlLook::B_ACTIVATED);
	} else
		be_control_look->DrawButtonBackground(menu, frame, frame, base);

	menu->MovePenTo(ContentLocation());
	DrawContent();

	menu->PopState();
}

void
BSeparatorItem::Draw()
{
	BMenu *menu = Menu();
	if (menu == NULL)
		return;

	BRect bounds = Frame();
	rgb_color oldColor = menu->HighColor();
	rgb_color lowColor = menu->LowColor();

	const float startTop = bounds.top + (floor(bounds.Height())) / 2;
	menu->SetHighColor(tint_color(lowColor, B_DARKEN_1_TINT));
	menu->StrokeLine(BPoint(bounds.left + 1.0f, startTop),
		BPoint(bounds.right - 1.0f, startTop));
	menu->SetHighColor(tint_color(lowColor, B_LIGHTEN_2_TINT));
	menu->StrokeLine(BPoint(bounds.left + 1.0f, startTop + 1.0f),
		BPoint(bounds.right - 1.0f, startTop + 1.0f));

	menu->SetHighColor(oldColor);
}

void
TTeamMenuItem::DrawContent()
{
	BMenu* menu = Menu();
	if (fIcon != NULL) {
		if (fIcon->ColorSpace() == B_RGBA32) {
			menu->SetDrawingMode(B_OP_ALPHA);
			menu->SetBlendingMode(B_PIXEL_ALPHA, B_ALPHA_OVERLAY);
		} else
			menu->SetDrawingMode(B_OP_OVER);

		BRect frame(Frame());
		BRect iconBounds(fIcon->Bounds());
		BRect dstRect(iconBounds);
		float extra = fVertical ? 0.0f : -1.0f;
		BPoint contLoc = ContentLocation();
		BPoint drawLoc = contLoc + BPoint(kHPad, kVPad);

		if (!fDrawLabel || (fVertical && iconBounds.Width() > 32)) {
			float offsetx = contLoc.x
				+ ((frame.Width() - iconBounds.Width()) / 2) + extra;
			float offsety = contLoc.y + 3.0f + extra;

			dstRect.OffsetTo(BPoint(offsetx, offsety));
			menu->DrawBitmapAsync(fIcon, dstRect);

			drawLoc.x = ((frame.Width() - LabelWidth()) / 2);
			drawLoc.y = frame.top + iconBounds.Height() + 4.0f;
		} else {
			float offsetx = contLoc.x + kHPad;
			float offsety = contLoc.y + 
				((frame.Height() - iconBounds.Height()) / 2) + extra;

			dstRect.OffsetTo(BPoint(offsetx, offsety));
			menu->DrawBitmapAsync(fIcon, dstRect);

			float labelHeight = fLabelAscent + fLabelDescent;
			drawLoc.x += iconBounds.Width() + kLabelOffset;
			drawLoc.y = frame.top + ((frame.Height() - labelHeight) / 2) + extra;
		}

		menu->MovePenTo(drawLoc);
	}

	// set the pen to black so that either method will draw in the same color
	// low color is set in inherited::DrawContent, override makes sure its
	// what we want
	if (fDrawLabel) {
		menu->SetDrawingMode(B_OP_OVER);
		menu->SetHighColor(ui_color(B_MENU_ITEM_TEXT_COLOR));

		// override the drawing of the content when the item is disabled
		// the wrong lowcolor is used when the item is disabled since the
		// text color does not change
		DrawContentLabel();
	}

	// Draw the expandable icon.
	TBarView* barView = (static_cast<TBarApp*>(be_app))->BarView();
	if (fVertical && static_cast<TBarApp*>(be_app)->Settings()->superExpando
		&& barView->ExpandoState()) {
		BRect frame(Frame());
		BRect rect(0, 0, kSwitchWidth, 10);
		rect.OffsetTo(BPoint(frame.right - rect.Width(),
			ContentLocation().y + ((frame.Height() - rect.Height()) / 2)));

		if (be_control_look != NULL) {
			uint32 arrowDirection = fExpanded
				? BControlLook::B_UP_ARROW : BControlLook::B_DOWN_ARROW;
			be_control_look->DrawArrowShape(menu, rect, rect, menu->LowColor(),
				arrowDirection, 0, B_DARKEN_3_TINT);
		} else {
			rgb_color outlineColor = {80, 80, 80, 255};
			rgb_color middleColor = {200, 200, 200, 255};

			menu->SetDrawingMode(B_OP_OVER);

			if (!fExpanded) {
				menu->BeginLineArray(6);

				menu->AddLine(BPoint(rect.left + 3, rect.top + 1),
					BPoint(rect.left + 3, rect.bottom - 1), outlineColor);
				menu->AddLine(BPoint(rect.left + 3, rect.top + 1),
					BPoint(rect.left + 7, rect.top + 5), outlineColor);
				menu->AddLine(BPoint(rect.left + 7, rect.top + 5),
					BPoint(rect.left + 3, rect.bottom - 1), outlineColor);

				menu->AddLine(BPoint(rect.left + 4, rect.top + 3),
					BPoint(rect.left + 4, rect.bottom - 3), middleColor);
				menu->AddLine(BPoint(rect.left + 5, rect.top + 4),
					BPoint(rect.left + 5, rect.bottom - 4), middleColor);
				menu->AddLine(BPoint(rect.left + 5, rect.top + 5),
					BPoint(rect.left + 6, rect.top + 5), middleColor);
				menu->EndLineArray();
			} else {
				// expanded state

				menu->BeginLineArray(6);
				menu->AddLine(BPoint(rect.left + 1, rect.top + 3),
					BPoint(rect.right - 3, rect.top + 3), outlineColor);
//.........这里部分代码省略.........