Developer CD Series 1996 July: Mac OS SDK/Dev.CD Jul 96 SDK/Dev.CD Jul 96 SDK2.toast/Development Kits (Disc 2)/QuickDraw GX/Programming Stuff/Sample Code/Typography Samples/Shift Layout ƒ/Shift Layout.c

C/C++ Source or Header | 1995-04-10 | 12.9 KB | 416 lines | [TEXT/KAHL]

/**\
|**| =====================================================================
|**|
|**|    Shift Layout.c
|**|
|**|    This file contains the calls that this sample needs to make
|**|    the QuickDraw GX shell work correctly.
|**|
|**|    QuickDraw GX Libraries Used:
|**|    "color library.c", "font library.c", "graphics debug library.c",
|**|    "layout library.c", "shape library.c", and "transform library.c".
|**|
|**|    ©1992-1994  Apple Computer, Inc.
|**|    All rights reserved.
|**|
|**| =====================================================================
\**/


#include "QDGX shell.h"
#include "layout routines.h"
#include "layout library.h"


/**\
|**| ---------------------------------------------------------------------
|**| PROTOTYPES
|**| ---------------------------------------------------------------------
\**/

// funtions required by shell

void    DoSetup            (void);
void    DoDraw            (WindowPtr wind, Boolean updating);
OSErr    DoCreateNew        (void);
void    DoDispose        (WindowPtr wind);
void    DoIdle            (WindowPtr wind);
void    DoTeardown        (void);
void    DoClick            (WindowPtr wind, Point p);

// private functions

OSErr    DoWindowInit        (WindowPtr wind);
void    CreateSampleImage    (WindowPtr wind);


/**\
|**| ---------------------------------------------------------------------
|**| ENUMS
|**| ---------------------------------------------------------------------
\**/
enum { rWindResource = 128 };


/**\
|**| ---------------------------------------------------------------------
|**| GLOBALS
|**| ---------------------------------------------------------------------
\**/
// If gDebugging = TRUE, graphics library errors and notices will be posted.  This
// functionality will only work with the "debugging" version of QuickDraw GX.
// If the debugging version is not installed, nothing bad will happen, but these
// functions will not work.

Boolean        gDebugging = true;

// Set  "gGiveMeValidation" to TRUE if you want receive run-time validation.

Boolean        gGiveMeValidation = true;


// gGraphicsHeapSize sets the size of the graphics heap created by calling the
// GXNewGraphicsClient routine in main () within QuickDraw GX shell.c.  You can determine
// the amount of graphics heap required by using GraphicsBug.  I'm giving it 600K,
// since we need abunch if we have several windows open.

long        gGraphicsHeapSize = 600;

// gOurPrintingOverrideUPP is a universal proc pointer for our printing event
// override.  This is so that our override can be native PowerPC code if necessary.

GXPrintingEventUPP    gOurPrintingOverrideUPP;



/**\
|**| ---------------------------------------------------------------------
|**| DoSetup()
|**| Here's where we initialize any global variables our application needs.
|**| We have only one at this time -- the universal proc pointer for
|**| our printing override.
|**| ---------------------------------------------------------------------
\**/
void DoSetup (void)
{    // Initialize our printing event override UPP
    gOurPrintingOverrideUPP = NewGXPrintingEventProc(MyPrintingEventOverride);
}


/**\
|**| ---------------------------------------------------------------------
|**| DoDraw()
|**| Draw the contents of the window.  The first parameter is the window
|**| to draw, and the second parameter is true if we're updating an existing
|**| image.  If that's the case, we don't want to change anything, but
|**| just draw what's already there.
|**| ---------------------------------------------------------------------
\**/
void DoDraw (WindowPtr wind, Boolean updating)
{
     #pragma unused (updating)
     GXDrawShape (GetDocShape(wind));
}


/**\
|**| ---------------------------------------------------------------------
|**| DoCreateNew()
|**| This routine is called when a window needs to be created.
|**| ---------------------------------------------------------------------
\**/
OSErr DoCreateNew (void)
{
    OSErr        err = noErr;
    WindowPtr    wind;

// Get and create our window from the resource fork

    wind = GetNewWindow(rWindResource, nil, (WindowPtr)-1L);

// Attach a default gxViewPort to it, create and iInitialize our
// private data for it, and add a sample image to its page shape.

    if ( wind == NULL )
        return (MemError());

    GXIgnoreGraphicsNotice(transform_already_set);
    SetDefaultViewPort(GXNewWindowViewPort(wind));
    GXPopGraphicsNotice();

    err = DoWindowInit(wind);
    if ( err != noErr )
        return err;

    CreateSampleImage(wind);
    return err;
}


/**\
|**| ---------------------------------------------------------------------
|**| DoDispose()
|**| This routine is called when a window needs to be disposed of.
|**| ---------------------------------------------------------------------
\**/
void DoDispose (WindowPtr wind)
{
    TH_Doc    doc;

// You should always dispose of your GX graphics objects before tossing your window.
// Why?  It's generally good form and this approach guarantees that everything is
// disposed.  If you had not disposed of everything, the call to DisposeWindow should
// dispose of the objects. If you are running the debugging version of QuickDraw GX
// with notices set, you will receive a notice that you had not disposed of everything.
// You can turn notices on in this file by setting gDebugging = TRUE (above).

    if ( wind != NULL )
    {
        doc = (TH_Doc)GetWRefCon(wind);        // Remember, this is where we stored our private data.
        GXDisposeShape(GetDocShape(wind));     // Dispose of this doc's shape.
        GXDisposeJob(GetDocJob(wind));        // Dispose of this doc's print job.
        DisposHandle((Handle) doc);            // Dispose of our private data.
        DisposeWindow(wind);                // Dispose of the window.
    }
}


/**\
|**| ---------------------------------------------------------------------
|**| DoIdle()
|**| This routine is called to do things while idling through the event loop.
|**| ---------------------------------------------------------------------
\**/
void DoIdle (WindowPtr wind)
{
}


/**\
|**| ---------------------------------------------------------------------
|**| DoTeardown()
|**| This routine is called just before we quit to remove anything
|**| persistent that might have been setup by DoSetup().
|**| ---------------------------------------------------------------------
\**/
void DoTeardown (void)
{
    DisposeRoutineDescriptor(gOurPrintingOverrideUPP);
}


/**\
|**| ---------------------------------------------------------------------
|**| DoClick()
|**| ---------------------------------------------------------------------
\**/
void DoClick(WindowPtr window, Point p)
{
}





/**\
|**| ---------------------------------------------------------------------
|**| DoWindowInit()
|**| In this function we create and initialize the the private document
|**| structure for a new window.  This structure contains the print job and
|**| the shape which is drawn in the window.  We store this data in a handle
|**| and hang it off the window's refCon field for easy retrieval.  By doing
|**| this, rather than using globals, we can create many windows containing
|**| unique print jobs and shapes.
|**| ---------------------------------------------------------------------
\**/
OSErr DoWindowInit (WindowPtr wind)
{
    OSErr    err = noErr;
    gxJob    docJob;
    gxShape    docPage;
    TH_Doc    windDoc;


// Create the page shape. We set the unique items attribute to make sure that each item
// added to the picture has a unique reference. If this attribute was not set, we would
// not see all copies of anything we add to the shape multiple times -- we'd just see
// the last version added.

    docPage = GXNewShape(gxPictureType);
    GXSetShapeAttributes(docPage, (GXGetShapeAttributes(docPage) | gxUniqueItemsShape));


// Create a print job for this document.  This will be the same as the system default until
// the user goes through the dialogs for Page Setup or Print…

    err = GXNewJob(&docJob);


// If there are no errors, create a handle the size of our document structure and store
// the print job and page shape in it.  Store the handle in the window's refCon field so
// that we can get at it.  (Note that the utility routines "GetDocJob" and "GetDocShape"
// can be used to do this easily.

    if ( err == noErr )
    {
        windDoc = (TH_Doc) NewHandleClear(sizeof(T_Doc));

        if ( windDoc == NULL )
            err = MemError();
        else
        {
            (*windDoc)->docJob = docJob;
            (*windDoc)->docPage = docPage;
            SetWRefCon(wind, (long) windDoc);
        }

// Now install our application override for PrintingEvent so that we can
// support the new movable-modal printing dialog boxes.

        GXInstallApplicationOverride(docJob, gxPrintingEvent, gOurPrintingOverrideUPP);

    }

    return err;
}


/**\
|**| ---------------------------------------------------------------------
|**| CreateSampleImage()
|**| This function creates primitive shapes and adds them to the window's page shape.
|**| ---------------------------------------------------------------------
\**/
void CreateSampleImage (WindowPtr wind)
{
    Rect    ourWindowRect = wind->portRect; // the rectangle for this window
                                            // in QuickDraw coordinates
    gxShape layout;                        // the layout shape we build
    gxShape thePage;                    // this window's document shape
    gxRunControls runControls;            // run controls for the layout shape
    gxLayoutOptions layoutOptions;        // options for the layout shape
    gxStyle textStyles[5];                // an array of text style for our text runs

// These are the five text runs for this layout shape, in pieces because they're
// in different languages

    char *text1 = "Office";

// The following is "Macintosh" in Arabic:
// meem, alif, kaf,  noon, tah,  wau,  shin
// (This assumes the standard Arabic character set for Macintosh, by the way)

    char *text2 = "AWAY";

    char *textRuns[2];                    // an array of pointers to text runs

    short textLengths[2];                // an array of the lengths of each run
    short totalLength;                    // the total length of the layout's text
    short level0 = 0;                    // variable to take address of later

    gxPoint posn;                        // the position of the layout shape


// First, initialize the textRuns array to point to the two text runs

    textRuns[0] = text1;
    textRuns[1] = text2;

// Next, initialize the textLengths and levelRunLengths arrays.  MyStrLength() is
// in this file.

    textLengths[0] = MyStrLength (text1);
    textLengths[1] = MyStrLength (text2);

// totalLength is the length of all the text.

    totalLength = textLengths[0] + textLengths[1];


// make default gxLayoutOptions and gxRunControls structures

    InitializeLayoutOptions (&layoutOptions);
    InitializeRunControls (&runControls);


// Position the layout half way down the left edge of the window. Set
// the layout's width to the window's width and set the flushness to 1/2, this
// will cause the layout to center in the window.  Note that ourWindowRect is
// not in fixed coordinates, so we have to make it fixed to use it.

    layoutOptions.width = ff(ourWindowRect.right - ourWindowRect.left);
    layoutOptions.flush = fract1/2;

    posn.x = 0;
    posn.y = ff((ourWindowRect.bottom - ourWindowRect.top) / 2);


// Create the styles we'll use.
// NewLayoutStyle is a library routine found in layout library.c.

    textStyles[0] = NewLayoutStyle(
        (char *) "\pHoefler Text",            // the gxFontName for the style
        ff(60),                                // the text size in fixed point
        0,                                    // gxTextAttributes
        &runControls,                        // run controls (our default ones)
        nil,                                // run features (none for this style)
        0,                                    // count of run features
        nil);                                // style run overrides (none right now)

// Now set the run controls to add 30 points cross-stream kerning and -4 points
// with-stream kerning, which moves the text four points closer together than
// normal kerning would.

    runControls.crossStreamShift = ff(30);
    runControls.beforeWithStreamShift = ff(-4);

// Now make another style with our new shifted kerning

    textStyles[1] = NewLayoutStyle(
        (char *) "\pHoefler Text",            // the gxFontName for the style
        ff(30),                                // the text size in fixed point
        0,                                    // gxTextAttributes
        &runControls,                        // run controls (our default ones)
        nil,                                // run features (none for this style)
        0,                                    // count of run features
        nil);                                // style run overrides (none right now)


// Setup complete!  Build the layout.

    layout = GXNewLayout(
        2,                                // count of text runs
        textLengths,                    // array of lengths of each run
        (void *) textRuns,                // array of pointers to the text
        2,                                // count of style runs
        textLengths,                    // array of the byte lengths of each run
        textStyles,                        // array of the styles
        1,                                // number of levels in the layout
        &totalLength,                    // array of the lengths of each level
        &level0,                        // array of the levels
        &layoutOptions,                    // options (default)
        &posn);                            // position of the layout shape


// Retrieve the page shape so we can add to it.

    thePage = GetDocShape(wind);

// Add the layout to the window's picture shape.  AddToShape is in shape library.c.

    AddToShape(thePage, layout);

// Dispose of what we created

    GXDisposeShape(layout);
    GXDisposeStyle(textStyles[0]);
    GXDisposeStyle(textStyles[1]);


// Invalidate the window's portRect so that everything gets updated.

    SetPort(wind);
    InvalRect(&ourWindowRect);
}