/*

    File:       MenuDrawing.c

    Contains:   Code to demonstrate menu drawing routines of the Appearance Manager.

    Version:    Mac OS X

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*/

#include "AppearanceSamplePrefix.h"

#include "AppearanceHelpers.h"

#include "MenuDrawing.h"

#if !BUILDING_FOR_CARBON_8

    #include <Carbon/Carbon.h>

#else

    #include <Carbon.h>

#endif

struct DrawingInfo

{

    ThemeFontID     fontID;

    ThemeDrawState  state;

    CFStringRef     string;

};

struct MenuItemInfo

{

    CFStringRef         text;

    ThemeMenuItemType   type;

    ThemeMenuState      state;

};

const ControlID     kMessageText = { 'MDRW', 1 };

MenuDrawingWindow::MenuDrawingWindow()

    : TWindow( appNibName, CFSTR( "Menu Drawing" ) )

{

    fPhase = 0;

    fErase = true;

    fColoredBackground = true;

    InstallEventLoopTimer( GetCurrentEventLoop(), 0, 1, GetMenuDrawingTimerUPP(), this, &fTimer );

    Show();

}

MenuDrawingWindow::~MenuDrawingWindow()

{

    if ( fTimer )

        RemoveEventLoopTimer( fTimer );

}

pascal void

MenuDrawingWindow::TimerHook( EventLoopTimerRef inTimerRef, void* userData )

{

    ((MenuDrawingWindow*)userData)->Idle();

}

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

//  ¥ DrawMenuStuff

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

//  Draws the menu bar, menu background, etc. for the current theme.

//

void

MenuDrawingWindow::Idle()

{

    Rect                    bounds, menuBarRect;

    Rect                    portRect;

    SInt16                  height;

    CFStringRef             message = NULL;

    ControlRef              control;

    ::SetPort( GetPort() );

    ::GetPortBounds( GetPort(), &portRect );

    if ( fErase )

    {

        ::EraseRect( &portRect );

        // provide a color background to show transparency

        if ( fColoredBackground )

        {

            bounds = portRect;

            bounds.right = bounds.left + 40;

            PaintRect( &bounds );

            OffsetRect( &bounds, 40, 0 );

            ForeColor( redColor );

            PaintRect( &bounds );

            OffsetRect( &bounds, 40, 0 );

            ForeColor( greenColor );

            PaintRect( &bounds );

            ForeColor( blackColor );

        }

    }

    TextFont( 0 );

    TextSize( 0 );

    bounds = portRect;

    InsetRect( &bounds, 60, 60 );

    GetThemeMenuBarHeight( &height );

    menuBarRect = bounds;

    menuBarRect.bottom = menuBarRect.top + height;

    switch ( fPhase++ )

    {

        case 0:

            message = CFCopyLocalizedString( CFSTR( "Empty Menu Bar" ), CFSTR( "" ) );

            ::DrawThemeMenuBarBackground( &menuBarRect, kThemeMenuBarNormal, 0 );

            ::GetControlByID( GetWindowRef(), &kMessageText, &control );

            ::SetStaticTextCFString( control, message, true );

            break;

        case 1:

            message = CFCopyLocalizedString( CFSTR( "Hilited Menu Bar" ), CFSTR( "" ) );

            ::DrawThemeMenuBarBackground( &menuBarRect, kThemeMenuBarSelected, 0 );

            ::GetControlByID( GetWindowRef(), &kMessageText, &control );

            ::SetStaticTextCFString( control, message, true );

            break;

        case 2:

            message = CFCopyLocalizedString( CFSTR( "Menu Bar With One Active Menu" ), CFSTR( "" ) );

            ::DrawThemeMenuBarBackground( &menuBarRect, kThemeMenuBarNormal, 0 );   

            DrawFileTitle( menuBarRect, kThemeMenuActive );

            ::GetControlByID( GetWindowRef(), &kMessageText, &control );

            ::SetStaticTextCFString( control, message, true );

            break;

        case 3:

            message = CFCopyLocalizedString( CFSTR( "Menu Bar With One Selected Menu" ), CFSTR( "" ) );

            ::DrawThemeMenuBarBackground( &menuBarRect, kThemeMenuBarNormal, 0 );

            DrawFileTitle( menuBarRect, kThemeMenuSelected );

            ::GetControlByID( GetWindowRef(), &kMessageText, &control );

            ::SetStaticTextCFString( control, message, true );

            break;

        case 4:

            message = CFCopyLocalizedString( CFSTR( "Menu Bar With One Disabled Menu" ), CFSTR( "" ) );

            ::DrawThemeMenuBarBackground( &menuBarRect, kThemeMenuBarNormal, 0 );

            DrawFileTitle( menuBarRect, kThemeMenuDisabled );

            ::GetControlByID( GetWindowRef(), &kMessageText, &control );

            ::SetStaticTextCFString( control, message, true );

            break;

        case 5:

            message = CFCopyLocalizedString( CFSTR( "Pull Down Menu Background" ), CFSTR( "" ) );

            ::DrawThemeMenuBackground( &bounds, kThemeMenuTypePullDown );

            ::GetControlByID( GetWindowRef(), &kMessageText, &control );

            ::SetStaticTextCFString( control, message, true );

            break;

        case 6:

            message = CFCopyLocalizedString( CFSTR( "Popup Menu Background" ), CFSTR( "" ) );

            ::DrawThemeMenuBackground( &bounds, kThemeMenuTypePopUp );

            ::GetControlByID( GetWindowRef(), &kMessageText, &control );

            ::SetStaticTextCFString( control, message, true );

            break;

        case 7:

            message = CFCopyLocalizedString( CFSTR( "Simulated Menu" ), CFSTR( "" ) );

            DrawSimulatedMenu();

            ::GetControlByID( GetWindowRef(), &kMessageText, &control );

            ::SetStaticTextCFString( control, message, true );

            fErase = false;

            break;

        default:

            message = CFCopyLocalizedString( CFSTR( "Done" ), CFSTR( "" ) );

            RemoveEventLoopTimer( fTimer );

            fTimer = NULL;

            ::GetControlByID( GetWindowRef(), &kMessageText, &control );

            ::SetStaticTextCFString( control, message, true );

            break;

    }

    if ( message )

        CFRelease( message );

}

void

MenuDrawingWindow::DrawFileTitle( const Rect& menuBarRect, ThemeMenuState inState )

{

    CFStringRef     string;

    Rect            tempRect;

    DrawingInfo     info;

    SInt16          widthExtra;

    Point           dimensions;

    SInt16          baseLine;

    string = ::CFCopyLocalizedString( CFSTR( "File" ), CFSTR( "" ) );

    if ( inState == kThemeMenuActive )

        info.state = kThemeStateActive;

    else if ( inState == kThemeMenuSelected )

        info.state = kThemeStatePressed;

    else if ( inState == kThemeMenuDisabled )

        info.state = kThemeStateInactive;

    ::GetThemeMenuTitleExtra( &widthExtra, false );

    ::GetThemeTextDimensions( string, kThemeMenuTitleFont, info.state, false,

                &dimensions, &baseLine );

    tempRect = menuBarRect;

    tempRect.left += 10;

    tempRect.right = tempRect.left + widthExtra + dimensions.h;

    info.fontID = kThemeMenuTitleFont;

    info.string = string;

    ::DrawThemeMenuTitle( &menuBarRect, &tempRect, (UInt16) inState, 0,

            GetMenuTitleDrawingUPP(), (long)&info );

    ::CFRelease( string );

}

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

//  ¥ DrawMenuTitle

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

//  Draws the menu title centered in the rectangle passed.

//

pascal void

MenuDrawingWindow::DrawMenuTitle( const Rect* bounds, SInt16 depth, Boolean colorDevice, long userData )

{

    #pragma unused( depth, colorDevice )

    DrawingInfo*    info = (DrawingInfo*)userData;

    ::DrawThemeTextBox( info->string, info->fontID, info->state, false, bounds,

            teFlushDefault, NULL );

}

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

//  ¥ DrawSimulatedMenu

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

//  Draws a menu complete with items. It uses the Appearance Manager routines to calculate

//  the item width and height and also iterates over each item, hiliting and unhiliting it.

//

void

MenuDrawingWindow::DrawSimulatedMenu()

{

    MenuItemInfo            items[] =

    {

        { NULL, kThemeMenuItemScrollUpArrow, kThemeMenuActive },

        { NULL, kThemeMenuItemPlain, kThemeMenuSelected },

        { NULL, kThemeMenuItemHierarchical, kThemeMenuActive },

        { (CFStringRef)-1L, kThemeMenuItemPlain, kThemeMenuDisabled },

        { NULL, kThemeMenuItemPlain, kThemeMenuDisabled },

        { NULL, kThemeMenuItemPlain, kThemeMenuActive },

        { NULL, kThemeMenuItemScrollDownArrow, kThemeMenuActive }

    };

    Rect                    menuRect, itemRect;

    SInt16                  height, width;

    SInt16                  i, itemHeight;

    SInt16                  extraHeight, extraWidth, sepHeight, maxExtraWidth;

    GrafPtr                 port;

    SInt16                  numItems = sizeof( items ) / sizeof( MenuItemInfo );

    Point                   dimensions;

    SInt16                  baseLine;

    CFStringRef             format;

    format = CFCopyLocalizedString( CFSTR( "Menu Item %d" ), CFSTR( "" ) );

    check( format != NULL );

    // Create some strings

    for ( i = 0; i < numItems; i++ )

    {

        if ( items[i].text != (CFStringRef)-1L

             && items[i].type != kThemeMenuItemScrollUpArrow

             && items[i].type != kThemeMenuItemScrollDownArrow )

        {

            items[i].text = ::CFStringCreateWithFormat( NULL, NULL, format, i + 1 );

        }

    }

    CFRelease( format );

    // Calculate the width and height of our menu.

    // Use a representative string to measure text.

    ::GetThemeTextDimensions( CFSTR( "Sample Text" ), kThemeMenuItemFont, kThemeStateActive,

            false, &dimensions, &baseLine );

    ::GetThemeMenuSeparatorHeight( &sepHeight );

    ::GetPort( &port );

    height = 0;

    width = 0;

    maxExtraWidth = 0;

    itemHeight = dimensions.v;

    for ( i = 0; i < numItems; i++ )

    {

        if ( items[i].text != (CFStringRef)-1L )

        {

            // Depending on the type of menu item type you're going

            // to draw, the width may differ. We must make sure we've use the biggest

            // extraWidth we get, so call GetThemeMenuItemExtra each time thru.

            GetThemeMenuItemExtra( items[i].type,  &extraHeight, &extraWidth );

            if ( items[i].text != NULL )

            {

                ::GetThemeTextDimensions( items[i].text, kThemeMenuItemFont, kThemeStateActive,

                            false, &dimensions, &baseLine );

                if ( dimensions.h > width )

                    width = dimensions.h;

            }

            if ( extraWidth > maxExtraWidth )

                maxExtraWidth = extraWidth;

            height += (itemHeight + extraHeight);

        }

        else

        {

            height += sepHeight;

        }

    }

    width += maxExtraWidth;

    // OK, now that we've gotten our height and width, let's draw the menu

    // background.

    menuRect.top = 20;

    menuRect.left = 20;

    menuRect.bottom = menuRect.top + height;

    menuRect.right = menuRect.left + width;

    DrawThemeMenuBackground( &menuRect, kThemeMenuTypePullDown );

    // Now let's draw each item, using the calculations made above. Here

    // we assume that the itemHeights are all the same, but we could have

    // stored the heights and used each individual item's height.

    itemRect = menuRect;

    itemRect.bottom = itemRect.top;

    for ( i = 0; i < numItems; i++ )

    {

        if ( items[i].text != (CFStringRef)-1L )

        {

            DrawingInfo     info;

            info.fontID = kThemeMenuItemFont;

            info.string = items[i].text;

            if ( items[i].state == kThemeMenuActive )

                info.state = kThemeStateActive;

            else if ( items[i].state == kThemeMenuSelected )

                info.state = kThemeStatePressed;

            else if ( items[i].state == kThemeMenuDisabled )

                info.state = kThemeStateInactive;

            itemRect.bottom = itemRect.top + itemHeight + extraHeight;

            /*

                Specify kThemeMenuItemNoBackground for drawing the menu items because the background has already

                been drawn above, and if we draw it a second time, because the background is drawn with alpha, we

                will converge to zero transparency instead of allowing what's behind the menu to show through.

            */

            if ( info.string != NULL )

            {

                DrawThemeMenuItem( &menuRect, &itemRect, menuRect.top, menuRect.bottom,

                        (UInt16) items[i].state, items[i].type | kThemeMenuItemNoBackground, GetMenuItemDrawingUPP(),

                        (UInt32) &info );

            }

            else

            {

                DrawThemeMenuItem( &menuRect, &itemRect, menuRect.top, menuRect.bottom,

                        (UInt16) items[i].state, items[i].type | kThemeMenuItemNoBackground, NULL, 0 );

            }

        }

        else

        {

            itemRect.bottom = itemRect.top + sepHeight;

            DrawThemeMenuSeparator( &itemRect );

        }

        itemRect.top = itemRect.bottom;

    }

    // Release our strings

    for ( i = 0; i < numItems; i++ )

    {

        if ( items[i].text != (CFStringRef)-1L 

            && items[i].text != NULL )

        {

            CFRelease( items[i].text );

        }

    }

}

EventLoopTimerUPP

MenuDrawingWindow::GetMenuDrawingTimerUPP()

{

    static EventLoopTimerUPP sUPP = NULL;

    if ( sUPP == NULL )

        sUPP = NewEventLoopTimerUPP( TimerHook );

    return sUPP;

}

MenuTitleDrawingUPP

MenuDrawingWindow::GetMenuTitleDrawingUPP()

{

    static MenuTitleDrawingUPP sUPP = NULL;

    if ( sUPP == NULL )

        sUPP = NewMenuTitleDrawingUPP( DrawMenuTitle );

    return sUPP;

}

MenuItemDrawingUPP

MenuDrawingWindow::GetMenuItemDrawingUPP()

{

    // we take advantage of the identical prototypes for menu item- and title-drawing callbacks

    return (MenuItemDrawingUPP) GetMenuTitleDrawingUPP();

}