C++ Flags函数代码示例

void
CTool::SetValue(
	int32 value)
{
	D_OPERATION(("CTool::SetValue(%ld)\n", value));

	if (value != m_value)
	{
		if (Mode() == TRIGGER_MODE)
		{
			// trigger tools don't change their value
			return;
		}

		if ((Mode() == RADIO_MODE) && (Flags() & FORCE_SELECTION)
		 && (Value() == B_CONTROL_ON))
		{
			// radio mode with the force-selection flag set does not
			// allow 'turning off' the tool directly
			return;
		}

		m_value = value;

		if ((Mode() == RADIO_MODE) && (Value() == B_CONTROL_ON))
		{
			// turn off other tools in radio group
			CTool *tool;
			tool = PreviousTool();
			while (tool)
			{
				if (tool->m_value == B_CONTROL_ON)
				{
					tool->m_value = B_CONTROL_OFF;
					tool->ValueChanged();
				}
				tool = tool->PreviousTool();
			}
			tool = NextTool();
			while (tool)
			{
				if (tool->m_value == B_CONTROL_ON)
				{
					tool->m_value = B_CONTROL_OFF;
					tool->ValueChanged();
				}
				tool = tool->NextTool();
			}
		}
		ValueChanged();
	}	
}

void
BMenuField::DoLayout()
{
	// Bail out, if we shan't do layout.
	if (!(Flags() & B_SUPPORTS_LAYOUT))
		return;

	CALLED();

	// If the user set a layout, we let the base class version call its
	// hook.
	if (GetLayout()) {
		BView::DoLayout();
		return;
	}

	_ValidateLayoutData();

	// validate current size
	BSize size(Bounds().Size());
	if (size.width < fLayoutData->min.width)
		size.width = fLayoutData->min.width;
	if (size.height < fLayoutData->min.height)
		size.height = fLayoutData->min.height;

	// divider
	float divider = 0;
	if (fLayoutData->label_layout_item && fLayoutData->menu_bar_layout_item) {
		// We have layout items. They define the divider location.
		divider = fLayoutData->menu_bar_layout_item->Frame().left
			- fLayoutData->label_layout_item->Frame().left;
	} else {
		if (fLayoutData->label_width > 0)
			divider = fLayoutData->label_width + 5;
	}

	// menu bar
	BRect dirty(fMenuBar->Frame());
	BRect menuBarFrame(divider + kVMargin, kVMargin, size.width - kVMargin,
		size.height - kVMargin);

	// place the menu bar and set the divider
	BLayoutUtils::AlignInFrame(fMenuBar, menuBarFrame);

	fDivider = divider;

	// invalidate dirty region
	dirty = dirty | fMenuBar->Frame();
	dirty.InsetBy(-kVMargin, -kVMargin);

	Invalidate(dirty);
}

  void
  VirtualKey::VK_JIS_TEMPORARY::firekeytoinputdetail(const Params_KeyboardEventCallBack& params,
                                                     InputSourceDetail inputsourcedetail)
  {
    inputsourcedetail = normalize(inputsourcedetail);
    currentinputsourcedetail_ = normalize(currentinputsourcedetail_);

    // ------------------------------------------------------------
    if (inputsourcedetail == currentinputsourcedetail_) return;
    if (inputsourcedetail == InputSourceDetail::NONE) return;

    currentinputsourcedetail_ = inputsourcedetail;

    // ------------------------------------------------------------
    if (inputsourcedetail == InputSourceDetail::ENGLISH) {
      fireKeyInfo_.flags = Flags(0);
      fireKeyInfo_.key = KeyCode::JIS_EISUU;

    } else if (inputsourcedetail == InputSourceDetail::JAPANESE_HIRAGANA) {
      fireKeyInfo_.flags = Flags(0);
      fireKeyInfo_.key = KeyCode::JIS_KANA;

    } else if (inputsourcedetail == InputSourceDetail::JAPANESE_KATAKANA) {
      fireKeyInfo_.flags = ModifierFlag::SHIFT_L;
      fireKeyInfo_.key = KeyCode::JIS_KANA;

    } else if (inputsourcedetail == InputSourceDetail::AINU) {
      fireKeyInfo_.flags = ModifierFlag::OPTION_L;
      fireKeyInfo_.key = KeyCode::JIS_KANA;

    } else {
      return;
    }

    fireKeyInfo_.keyboardType = params.keyboardType;
    fireKeyInfo_.active = true;

    fire_timer_.setTimeoutMS(KEYEVENT_DELAY_MS);
  }

_BMCMenuBar_::_BMCMenuBar_(BMessage* data)
	:
	BMenuBar(data),
	fMenuField(NULL),
	fFixedSize(true),
	fShowPopUpMarker(true)
{
	SetFlags(Flags() | B_FRAME_EVENTS);

	bool resizeToFit;
	if (data->FindBool("_rsize_to_fit", &resizeToFit) == B_OK)
		fFixedSize = !resizeToFit;
}

void
BButton::MakeDefault(bool flag)
{
	BButton* oldDefault = NULL;
	BWindow* window = Window();

	if (window != NULL)
		oldDefault = window->DefaultButton();

	if (flag) {
		if (_Flag(FLAG_DEFAULT) && oldDefault == this)
			return;

		if (_SetFlag(FLAG_DEFAULT, true)) {
			if ((Flags() & B_SUPPORTS_LAYOUT) != 0)
				InvalidateLayout();
			else {
				ResizeBy(6.0f, 6.0f);
				MoveBy(-3.0f, -3.0f);
			}
		}

		if (window && oldDefault != this)
			window->SetDefaultButton(this);
	} else {
		if (!_SetFlag(FLAG_DEFAULT, false))
			return;

		if ((Flags() & B_SUPPORTS_LAYOUT) != 0)
			InvalidateLayout();
		else {
			ResizeBy(-6.0f, -6.0f);
			MoveBy(3.0f, 3.0f);
		}

		if (window && oldDefault == this)
			window->SetDefaultButton(NULL);
	}
}

WorkspacesView::WorkspacesView(BMessage* archive)
	:
	BView(archive),
	fParentWhichDrawsOnChildren(NULL),
	fCurrentFrame(Frame())
{
	// Just in case we are instantiated from an older archive...
	SetFlags(Flags() | B_FRAME_EVENTS);
	// Make sure the auto-raise feature didn't leave any artifacts - this is
	// not a good idea to keep enabled for a replicant.
	if (EventMask() != 0)
		SetEventMask(0);
}

void
BBox::DoLayout()
{
	// Bail out, if we shan't do layout.
	if (!(Flags() & B_SUPPORTS_LAYOUT))
		return;

	bool layouted = GetLayout() ? true : false;

	// If the user set a layout, let the base class version call its
	// hook. In case when we have BView as a label, remove it from child list
	// so it won't be layouted with the rest of views and add it again
	// after that.
	if (layouted) {
		if (fLabelView)
			RemoveChild(fLabelView);

		BView::DoLayout();

		if (fLabelView)
			AddChild(fLabelView, ChildAt(0));
		else
			return;
	}

	_ValidateLayoutData();

	// Even if the user set a layout, restore label view to it's
	// desired position.

	// layout the label view
	if (fLabelView) {
		fLabelView->MoveTo(fLayoutData->label_box.LeftTop());
		fLabelView->ResizeTo(fLayoutData->label_box.Size());
	}

	// If we have layout return here and do not layout the child
	if (layouted)
		return;

	// layout the child
	if (BView* child = _Child()) {
		BRect frame(Bounds());
		frame.left += fLayoutData->insets.left;
		frame.top += fLayoutData->insets.top;
		frame.right -= fLayoutData->insets.right;
		frame.bottom -= fLayoutData->insets.bottom;

		BLayoutUtils::AlignInFrame(child, frame);
	}
}

void
ShowImageWindow::_ToggleFullScreen()
{
	BRect frame;
	fFullScreen = !fFullScreen;
	if (fFullScreen) {
		BScreen screen;
		fWindowFrame = Frame();
		frame = screen.Frame();
		frame.top -= fBar->Bounds().Height() + 1;
		frame.right += B_V_SCROLL_BAR_WIDTH;
		frame.bottom += B_H_SCROLL_BAR_HEIGHT;

		SetFlags(Flags() | B_NOT_RESIZABLE | B_NOT_MOVABLE);

		Activate();
			// make the window frontmost
	} else {
		frame = fWindowFrame;

		SetFlags(Flags() & ~(B_NOT_RESIZABLE | B_NOT_MOVABLE));
	}

	fToolBar->SetActionVisible(MSG_FULL_SCREEN, fFullScreen);
	_SetToolBarVisible(!fFullScreen && fShowToolBar);
	_SetToolBarBorder(!fFullScreen);

	MoveTo(frame.left, frame.top);
	ResizeTo(frame.Width(), frame.Height());

	fImageView->SetHideIdlingCursor(fFullScreen);
	fImageView->SetShowCaption(fFullScreen && fShowCaption);

	Layout(false);
		// We need to manually relayout here, as the views are layouted
		// asynchronously, and FitToBounds() would still have the wrong size
	fImageView->FitToBounds();
}

    void print_flags(Flags flag, const char * (&names)[N], std::string& str)
    {
        if (flag == 0)
        {
            str += "None";
            return;
        }

        for (int i = 0; i < N; ++i)
        {
            if ((flag & (Flags(1) << i)) && names[i] != NULL)
                str.append(" ").append(names[i]);
        }
    }

void
BScrollView::SetBorder(border_style border)
{
	if (fBorder == border)
		return;

	float offset = BorderSize(fBorder) - BorderSize(border);
	float resize = 2 * offset;

	float horizontalGap = 0, verticalGap = 0;
	float change = 0;
	if (border == B_NO_BORDER || fBorder == B_NO_BORDER) {
		if (fHorizontalScrollBar != NULL)
			verticalGap = border != B_NO_BORDER ? 1 : -1;
		if (fVerticalScrollBar != NULL)
			horizontalGap = border != B_NO_BORDER ? 1 : -1;

		change = border != B_NO_BORDER ? -1 : 1;
		if (fHorizontalScrollBar == NULL || fVerticalScrollBar == NULL)
			change *= 2;
	}


	fBorder = border;

	int32 savedResizingMode = 0;
	if (fTarget != NULL) {
		savedResizingMode = fTarget->ResizingMode();
		fTarget->SetResizingMode(B_FOLLOW_NONE);
	}

	MoveBy(offset, offset);
	ResizeBy(-resize - horizontalGap, -resize - verticalGap);

	if (fTarget != NULL) {
		fTarget->MoveBy(-offset, -offset);
		fTarget->SetResizingMode(savedResizingMode);
	}

	if (fHorizontalScrollBar != NULL) {
		fHorizontalScrollBar->MoveBy(-offset - verticalGap, offset + verticalGap);
		fHorizontalScrollBar->ResizeBy(resize + horizontalGap - change, 0);
	}
	if (fVerticalScrollBar != NULL) {
		fVerticalScrollBar->MoveBy(offset + horizontalGap, -offset - horizontalGap);
		fVerticalScrollBar->ResizeBy(0, resize + verticalGap - change);
	}

	SetFlags(ModifyFlags(Flags(), border));
}

void
BStatusBar::_InitObject()
{
	fMax = 100.0;
	fCurrent = 0.0;

	fBarHeight = -1.0;
	fTextDivider = Bounds().Width();

	fBarColor = kDefaultBarColor;
	fCustomBarHeight = false;

	SetFlags(Flags() | B_FRAME_EVENTS);
}

void
BStatusBar::_InitObject()
{
    fMax = 100.0;
    fCurrent = 0.0;

    fBarHeight = -1.0;
    fTextDivider = Bounds().Width();

    fCustomBarHeight = false;
    fInternalFlags = 0;

    SetFlags(Flags() | B_FRAME_EVENTS);
}

void QgsVectorLayerLabelProvider::init()
{
  mPlacement = mSettings.placement;
  mLinePlacementFlags = mSettings.placementFlags;
  mFlags = Flags();
  if ( mSettings.drawLabels ) mFlags |= DrawLabels;
  if ( mSettings.displayAll ) mFlags |= DrawAllLabels;
  if ( mSettings.mergeLines ) mFlags |= MergeConnectedLines;
  if ( mSettings.centroidInside ) mFlags |= CentroidMustBeInside;
  if ( mSettings.fitInPolygonOnly ) mFlags |= FitInPolygonOnly;
  if ( mSettings.labelPerPart ) mFlags |= LabelPerFeaturePart;
  mPriority = 1 - mSettings.priority / 10.0; // convert 0..10 --> 1..0
  mObstacleType = mSettings.obstacleType;
  mUpsidedownLabels = mSettings.upsidedownLabels;
}

/*------------------------------------------------------------------------------*\
	( )
		-	
\*------------------------------------------------------------------------------*/
BmToolbarButton::BmToolbarButton( const char *label, float width, float height, 
											 BMessage *message, BHandler *handler, 
											 const char* tipText, bool needsLatch,
											 const char* resourceName)
	:	inherited( minimax( int(width), int(height), -1 ,-1), 
					  &BmDummyPicture, &BmDummyPicture, message, handler)
	,	mHighlighted( false)
	,	mNeedsLatch( needsLatch)
	,	mUpdateVariationsFunc( NULL)
	,	mLabel( label)
	,	mResourceName( resourceName ? resourceName : label)
{
	SetFlags(Flags() & ~B_NAVIGABLE);
	TheBubbleHelper->SetHelp( this, tipText);
}

void
BControl::InitData(BMessage* data)
{
	fLabel = NULL;
	SetLabel(B_EMPTY_STRING);
	fValue = B_CONTROL_OFF;
	fEnabled = true;
	fFocusChanging = false;
	fTracking = false;
	fWantsNav = Flags() & B_NAVIGABLE;
	fIcon = NULL;

	if (data && data->HasString("_fname"))
		SetFont(be_plain_font, B_FONT_FAMILY_AND_STYLE);
}