// ===========================================================================

//  CGrayBox.cp                 ©1995 Apple Computer, Inc. All rights reserved.

// ===========================================================================

#include "CGrayBox.h"

#include <UDrawingUtils.h>

#include <UDrawingState.h>

// ---------------------------------------------------------------------------

//      ¥ CreateGrayBoxStream

// ---------------------------------------------------------------------------

//  Create a GrayBox object from the data in a Stream

CGrayBox*

CGrayBox::CreateGrayBoxStream(

    LStream *inStream)

{

    return (new CGrayBox(inStream));

}

// ---------------------------------------------------------------------------

//      ¥ CGrayBox(LStream *)

// ---------------------------------------------------------------------------

//  Constructor

//

//  This class has no new member variables and needs no preparation, so

//  it just calls the constructor for LPane

CGrayBox::CGrayBox(

    LStream *inStream)

        : LView(inStream)

{

    mDrawGrayBkgrnd = false;

}

void

CGrayBox::ApplyForeAndBackColors()

{

    LView::ApplyForeAndBackColors();

    if (mDrawGrayBkgrnd)

        ::RGBBackColor(&mLtGray);

}

// ---------------------------------------------------------------------------

//      ¥ DrawSelf

// ---------------------------------------------------------------------------

//  Draws a filled rectangle. On screens with < 16 colors, the fill is

//  a gray pattern. On screens with >= 16 colors, the fill is a solid

//  gray color.

void

CGrayBox::DrawSelf()

{

    Rect    frame;                  // Get bounds of Pane in local coords

    CalcLocalFrameRect(frame);

    ApplyForeAndBackColors();

    ::EraseRect(&frame);

}

// ---------------------------------------------------------------------------

//      ¥ Draw

// ---------------------------------------------------------------------------

//  Draw a View and all its SubPanes

//

//  inSuperDrawRgnH specifies, in Port coordinates, the portion of the

//  View's SuperView that needs to be drawn. Specify nil to draw the

//  entire View.

//

//  This routine is overridden so that mDrawGrayBkgrnd can be set to draw a

//  gray background when we are drawing to a device with at least 16 colors.

void

CGrayBox::Draw(

    RgnHandle   inSuperDrawRgnH)

{

                                        // Don't draw if invisible or unable

                                        //   to put in focus

    if (IsVisible() && FocusDraw()) {

        Rect    frame;                  // Get bounds of Pane in local coords

        CalcLocalFrameRect(frame);

        StDeviceLoop    theLoop(frame); // Set up for looping thru each device

        Int16   depth;

        while (theLoop.NextDepth(depth)) {

                // At this point, the clipping region is set to the portion

                // of the Pane that is on the screen with the current

                // bit depth. Therefore, we can just draw everything, and

                // let the clipping region restrict the drawing.

                //

                // If you are interested in other characteristics of the

                // current screen device, you can call theLoop.GetCurrentDevice

                // which will return a GDHandle.

            mDrawGrayBkgrnd = (depth >= 4);

            LView::Draw(inSuperDrawRgnH);

        }

        mDrawGrayBkgrnd = false;        // reset back to false

    }

}