/*

File: IconDBCallbacks.c

Abstract: Data browser control callback functions for a list of icons with text 

          labels.

Version: 7.0

Change History:

    <7.0>   removed all code specific to PEF

            removed all code specific to Mac OS X prior to 10.3

    <6.0>   added support for Quartz 2D/Core Graphics

            split the callbacks into different versions based on 

            what's available in each system version

            added calculateCGDrawingBounds and getClipCGRect for the 

            Mach-O version

    <5.0>   changed this file's name from IconListDef.c to 

            IconDBCallbacks.c

            converted everything from a List Definition to a Data 

            Browser draw item callback

            added a Data Browser item notification callback to 

            handle item selection and deselection

    <4.0>   removed all Classic code

    <3.0>   no changes necessary

    <2.0>   Carbonized

            added accessor functions for the Classic version (see 

            the comment below)

    <1.0>   first release version

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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 

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*/

#include "IconDBCallbacks.h"

enum

{

    kIconWidth = 32,

    kIconHeight = 32,

    kTextBoxHeight = 14,

    kIconTextSpacingV = 2,

    kContentHeight = kIconHeight + kTextBoxHeight + kIconTextSpacingV

};

static void calculateDrawingBounds(CGRect inItemRect, CGRect *outIconRect, 

                                        CGRect *outTextRect);

static CGRect getClipCGRect(const Rect *portBounds);

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

pascal void DrawIconDataBrowserItem103CB(ControlRef browser, DataBrowserItemID item, 

                                            DataBrowserPropertyID property, 

                                            DataBrowserItemState itemState, 

                                            const Rect *theRect, SInt16 gdDepth, 

                                            Boolean colorDevice)

{

#pragma unused (theRect)

    Rect enclosingRect, portBounds;

    GrafPtr port;

    CGRect enclosingCGRect, iconCGRect, textCGRect;

    Boolean active;

    ThemeDrawingState savedState = NULL;

    CGContextRef context;

    IconDBItemDataRec *itemData;

    RGBColor labelColor;

    HIThemeTextInfo textInfo;

        /* The data browser currently gives us the content part bounds in the theRect 

           parameter but we want the enclosing part bounds to draw in so that we can 

           draw a fill style highlight. */

    GetDataBrowserItemPartBounds(browser, item, property, kDataBrowserPropertyEnclosingPart, 

                                    &enclosingRect);

        /* In Mac OS X we're going to use Quartz 2D/Core Graphics for the drawing, so we 

           need to convert the enclosing part bounds to a CGRect */

    GetPort(&port);     // the data browser sets the port up for us so we just need to get it

    GetPortBounds(port, &portBounds);

    enclosingCGRect = CGRectMake(enclosingRect.left, 

                                    portBounds.bottom - portBounds.top - 

                                    enclosingRect.bottom, 

                                    enclosingRect.right - enclosingRect.left, 

                                    enclosingRect.bottom - enclosingRect.top);

    calculateDrawingBounds(enclosingCGRect, &iconCGRect, &textCGRect);

    active = IsControlActive(browser);

    if ((itemState & kDataBrowserItemIsSelected) != 0)

    {

        CGRect clipRect;

        RGBColor foregroundColor;

        GetThemeDrawingState(&savedState);

        SetThemePen(active ? kThemeBrushPrimaryHighlightColor : kThemeBrushSecondaryHighlightColor, 

                    gdDepth, colorDevice);

        clipRect = getClipCGRect(&portBounds);  // call these before beginning the context

        GetForeColor(&foregroundColor);

        QDBeginCGContext(port, &context);

        CGContextClipToRect(context, clipRect);

        CGContextSaveGState(context);

        CGContextSetRGBFillColor(context, (float)foregroundColor.red / (float)USHRT_MAX, 

                                    (float)foregroundColor.green / (float)USHRT_MAX, 

                                    (float)foregroundColor.blue / (float)USHRT_MAX, 1.0);

        CGContextFillRect(context, enclosingCGRect);

        CGContextRestoreGState(context);

    }

    else

    {

            /* The data browser will redraw items on the edge of its content view.  

               Because HIThemeDrawTextBox does not erase the drawing rectangle before 

               it draws, the text becomes thicker with every draw due to anti-aliasing.  

               As a workaround, this section erases the text rectangle (if the item was 

               selected then the enclosing rectangle was erased above). */

        CGRect clipRect;

        RGBColor backgroundColor;

        clipRect = getClipCGRect(&portBounds);  // call these before beginning the context

        GetBackColor(&backgroundColor);

        QDBeginCGContext(port, &context);

        CGContextClipToRect(context, clipRect);

        CGContextSaveGState(context);

        CGContextSetRGBFillColor(context, (float)backgroundColor.red / (float)USHRT_MAX, 

                                    (float)backgroundColor.green / (float)USHRT_MAX, 

                                    (float)backgroundColor.blue / (float)USHRT_MAX, 1.0);

        CGContextFillRect(context, textCGRect);

        CGContextRestoreGState(context);

    }

    itemData = (IconDBItemDataRec *)item;

    labelColor.red = 0;

    labelColor.green = 0;

    labelColor.blue = 0;

    PlotIconRefInContext(context, &iconCGRect, kAlignNone, 

                            active ? kTransformNone : kTransformDisabled, &labelColor, 

                            kPlotIconRefNormalFlags, itemData->icon);

    textInfo.version = kHIThemeTextInfoVersionZero;

    textInfo.state = active ? kThemeStateActive : kThemeStateInactive;

    textInfo.fontID = kThemeViewsFont;

    textInfo.horizontalFlushness = kHIThemeTextHorizontalFlushCenter;

    textInfo.verticalFlushness = kHIThemeTextVerticalFlushTop;

    textInfo.options = kHIThemeTextBoxOptionNone;

    textInfo.truncationPosition = kHIThemeTextTruncationNone;

    HIThemeDrawTextBox(itemData->name, &textCGRect, &textInfo, context, 

                        kHIThemeOrientationInverted);

    QDEndCGContext(port, &context);

    if (savedState != NULL)

        SetThemeDrawingState(savedState, true);

} // DrawIconDataBrowserItem103CB

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

pascal void DrawIconDataBrowserItem104CB(ControlRef browser, DataBrowserItemID item, 

                                            DataBrowserPropertyID property, 

                                            DataBrowserItemState itemState, 

                                            const Rect *theRect, SInt16 gdDepth, 

                                            Boolean colorDevice)

{

#pragma unused (theRect, gdDepth, colorDevice)

    Rect enclosingRect, portBounds;

    GrafPtr port;

    CGRect enclosingCGRect, iconCGRect, textCGRect;

    Boolean active;

    CGContextRef context;

    IconDBItemDataRec *itemData;

    RGBColor labelColor;

    HIThemeTextInfo textInfo;

        /* The data browser currently gives us the content part bounds in the theRect 

           parameter but we want the enclosing part bounds to draw in so that we can 

           draw a fill style highlight. */

    GetDataBrowserItemPartBounds(browser, item, property, kDataBrowserPropertyEnclosingPart, 

                                    &enclosingRect);

        /* In Mac OS X we're going to use Quartz 2D/Core Graphics for the drawing, so we 

           need to convert the enclosing part bounds to a CGRect */

    GetPort(&port);     // the data browser sets the port up for us so we just need to get it

    GetPortBounds(port, &portBounds);

    enclosingCGRect = CGRectMake(enclosingRect.left, 

                                    portBounds.bottom - portBounds.top - 

                                    enclosingRect.bottom, 

                                    enclosingRect.right - enclosingRect.left, 

                                    enclosingRect.bottom - enclosingRect.top);

    calculateDrawingBounds(enclosingCGRect, &iconCGRect, &textCGRect);

    active = IsControlActive(browser);

    if ((itemState & kDataBrowserItemIsSelected) != 0)

    {

        CGRect clipRect;

        clipRect = getClipCGRect(&portBounds);  // call this before beginning the context

        QDBeginCGContext(port, &context);

        CGContextClipToRect(context, clipRect);

        CGContextSaveGState(context);

        HIThemeSetFill(active ? kThemeBrushPrimaryHighlightColor : kThemeBrushSecondaryHighlightColor, 

                        NULL, context, kHIThemeOrientationInverted);

        CGContextFillRect(context, enclosingCGRect);

        CGContextRestoreGState(context);

    }

    else

    {

            /* The data browser will redraw items on the edge of its content view.  

               Because HIThemeDrawTextBox does not erase the drawing rectangle before 

               it draws, the text becomes thicker with every draw due to anti-aliasing.  

               As a workaround, this section erases the text rectangle (if the item was 

               selected then the enclosing rectangle was erased above). */

        CGRect clipRect;

        RGBColor backgroundColor;

        clipRect = getClipCGRect(&portBounds);  // call these before beginning the context

        GetBackColor(&backgroundColor);

        QDBeginCGContext(port, &context);

        CGContextClipToRect(context, clipRect);

        CGContextSaveGState(context);

        CGContextSetRGBFillColor(context, (float)backgroundColor.red / (float)USHRT_MAX, 

                                    (float)backgroundColor.green / (float)USHRT_MAX, 

                                    (float)backgroundColor.blue / (float)USHRT_MAX, 1.0);

        CGContextFillRect(context, textCGRect);

        CGContextRestoreGState(context);

    }

    itemData = (IconDBItemDataRec *)item;

    labelColor.red = 0;

    labelColor.green = 0;

    labelColor.blue = 0;

    PlotIconRefInContext(context, &iconCGRect, kAlignNone, 

                            active ? kTransformNone : kTransformDisabled, &labelColor, 

                            kPlotIconRefNormalFlags, itemData->icon);

    textInfo.version = kHIThemeTextInfoVersionZero;

    textInfo.state = active ? kThemeStateActive : kThemeStateInactive;

    textInfo.fontID = kThemeViewsFont;

    textInfo.horizontalFlushness = kHIThemeTextHorizontalFlushCenter;

    textInfo.verticalFlushness = kHIThemeTextVerticalFlushTop;

    textInfo.options = kHIThemeTextBoxOptionNone;

    textInfo.truncationPosition = kHIThemeTextTruncationNone;

    HIThemeDrawTextBox(itemData->name, &textCGRect, &textInfo, context, 

                        kHIThemeOrientationInverted);

    QDEndCGContext(port, &context);

} // DrawIconDataBrowserItem104CB

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

static void calculateDrawingBounds(CGRect inItemRect, CGRect *outIconRect, 

                                        CGRect *outTextRect)

{

    float textBottom, itemCenterH;

    textBottom = inItemRect.origin.y + ((inItemRect.size.height - kContentHeight) / 2.0);

    itemCenterH = inItemRect.origin.x + (inItemRect.size.width / 2.0);

    *outIconRect = CGRectMake(itemCenterH - (kIconWidth / 2.0), 

                                textBottom + kTextBoxHeight + kIconTextSpacingV, kIconWidth, 

                                kIconHeight);

    *outTextRect = CGRectMake(inItemRect.origin.x, textBottom, inItemRect.size.width, 

                                kTextBoxHeight);

}

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

static CGRect getClipCGRect(const Rect *portBounds)

{

    RgnHandle clipRegion;

    Rect clipBounds;

    clipRegion = NewRgn();

    GetClip(clipRegion);

    GetRegionBounds(clipRegion, &clipBounds);

    DisposeRgn(clipRegion);

    return CGRectMake(clipBounds.left, 

                        portBounds->bottom - portBounds->top - clipBounds.bottom, 

                        clipBounds.right - clipBounds.left, clipBounds.bottom - clipBounds.top);

}

#pragma mark -

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

pascal void IconDataBrowserItemSelectionCB(ControlRef browser, DataBrowserItemID item, 

                                            DataBrowserItemNotification message)

{

#pragma unused (browser)

    IconDBItemDataRec *itemData;

    itemData = (IconDBItemDataRec *)item;

    switch (message)

    {

        case kDataBrowserItemSelected:

            HIViewSetVisible(itemData->userPane, true);

            break;

        case kDataBrowserItemDeselected:

            HIViewSetVisible(itemData->userPane, false);

            break;

    }

}