/*

 File: Controls.c

 Abstract: Defines utility functions for managing controls in the 

 application user interface.

 Version: 1.0

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 */ 

#include "Controls.h"

#include "ArcView.h"

// Initializes the text field with the default localized string

void InitializeTextField(HIWindowRef window)

{

    CFStringRef string = CFCopyLocalizedString(CFSTR("Curvaceous Type"), CFSTR("Default string"));

    static HIViewID     viewID = { kEditTextControlSignature, kEditTextControlID };

    HIViewRef           view;

    OSStatus            err;

    // Use the front window if none specified

    if (window == NULL)

        window = FrontNonFloatingWindow();

    // Get the control

    err = HIViewFindByID(HIViewGetRoot(window), viewID, &view);

    require_noerr(err, CantGetControl);

    // Get the text from the control

    verify_noerr(HIViewSetText(view, string));

CantGetControl: ;

}

// Gets the current text from the edit text control in the specified window and sets it to the arc view. 

void UpdateText(HIWindowRef window) 

{

    static HIViewID     viewID = { kEditTextControlSignature, kEditTextControlID };

    HIViewRef           view;

    OSStatus            err;

    CFStringRef         string;

    // Use the front window if none specified

    if (window == NULL)

        window = FrontNonFloatingWindow();

    // Get the control

    err = HIViewFindByID(HIViewGetRoot(window), viewID, &view);

    require_noerr(err, CantGetControl);

    // Get the text from the control

    string = HIViewCopyText(view);

    if (string != NULL) {

        // Set the text to the arc view of the same window

        ArcView *arcView = GetArcViewForWindow(window);

        ArcViewSetString(arcView, string);

        CFRelease(string);

    }

CantGetControl: ;

}

// Keeps the font controls in sync with the current font. It's important when provided style controls (eg. Bold, Italic) as we are, that they are kept in sync with the font. If the current font cannot be made bold, then the bold control should be disabled. If it is bold, the control should be checked. Likewise for italic. We leave updates of the menu items to another function.

void UpdateFontControls(HIWindowRef window) 

{

    ArcView                 *arcView;

    CTFontRef               font;

    CTFontSymbolicTraits    traits;

    HIViewRef               view;

    HIViewID                viewID;

    // If we weren't passed a window, use the front window

    if (window == NULL)

        window = FrontNonFloatingWindow();

    // Get the view for the window

    arcView = GetArcViewForWindow(window);

    // Get the current font and traits

    font = ArcViewGetFont(arcView);

    traits = CTFontGetSymbolicTraits(font);

    // Get the bold font checkbox control

    viewID.signature = kBoldFontControlSignature;

    viewID.id = kBoldFontControlID;

    verify_noerr(HIViewFindByID(HIViewGetRoot(window), viewID, &view));

    // Disable the bold checkbox if we can't toggle the trait

    HIViewSetEnabled(view, CanToggleFontTrait(font, kCTFontBoldTrait));

    // Set the value for the checkbox based on the current traits

    if ((traits & kCTFontBoldTrait) != 0)

        HIViewSetValue(view, kControlCheckBoxCheckedValue);

    else 

        HIViewSetValue(view, kControlCheckBoxUncheckedValue);

    // Get the italic font checkbox control

    viewID.signature = kItalicFontControlSignature;

    viewID.id = kItalicFontControlID;

    verify_noerr(HIViewFindByID(HIViewGetRoot(window), viewID, &view));

    // Disable the bold checkbox if we can't toggle the trait

    HIViewSetEnabled(view, CanToggleFontTrait(font, kCTFontItalicTrait));

    // Set the value for the checkbox based on the current traits

    if ((traits & kCTFontItalicTrait) != 0)

        HIViewSetValue(view, kControlCheckBoxCheckedValue);

    else 

        HIViewSetValue(view, kControlCheckBoxUncheckedValue);

}

enum {

    kShowFontsMenuItemIndex     = 1,

    kHideFontsMenuItemIndex     = 2,

    kBoldMenuItemIndex          = 3,

    kItalicMenuItemIndex        = 4

};

// Updates the font menu items in the Format menu to keep them in sync with the current font selection. We use two individual menu items to show and hide the Fonts window. Based on the visibility of the fonts window we hide one of thse items. Like UpdateFontControls we need to keep the bold and italic menu items in sync with the capabilities of the font.

void UpdateFormatMenu(MenuRef menu) 

{

    CTFontRef               font;

    ArcView *               arcView;

    CTFontSymbolicTraits    traits;

    // The menu is always based on the front most window

    arcView = GetArcViewForWindow(FrontNonFloatingWindow());

    assert(arcView != NULL);

    // Get the current font and traits

    font = ArcViewGetFont(arcView);

    traits = CTFontGetSymbolicTraits(font);

    if (FPIsFontPanelVisible()) {

        // Fonts window is visible. Hide "Show Fonts" and show "Hide Fonts"

        ChangeMenuItemAttributes(menu, kShowFontsMenuItemIndex, kMenuItemAttrHidden, 0);

        ChangeMenuItemAttributes(menu, kHideFontsMenuItemIndex, 0, kMenuItemAttrHidden);

    } else {

        // Fonts window is not visible. Show "Show Fonts" and hide "Hide Fonts"

        ChangeMenuItemAttributes(menu, kShowFontsMenuItemIndex, 0, kMenuItemAttrHidden);

        ChangeMenuItemAttributes(menu, kHideFontsMenuItemIndex, kMenuItemAttrHidden, 0);

    }

    // Check the menu item if the font has the bold trait

    CheckMenuItem(menu, kBoldMenuItemIndex, ((traits & kCTFontBoldTrait) != 0));

    // Disable the item if we can't toggle the bold trait

    if (!CanToggleFontTrait(font, kCTFontBoldTrait)) {

        ChangeMenuItemAttributes(menu, kBoldMenuItemIndex, kMenuItemAttrDisabled, 0);

    } else {

        ChangeMenuItemAttributes(menu, kBoldMenuItemIndex, 0, kMenuItemAttrDisabled);

    }

    // Check the menu item if the font has the italic trait

    CheckMenuItem(menu, kItalicMenuItemIndex, ((traits & kCTFontItalicTrait) != 0));

    // Disable the item if we can't toggle the italic trait

    if (!CanToggleFontTrait(font, kCTFontItalicTrait)) {

        ChangeMenuItemAttributes(menu, kItalicMenuItemIndex, kMenuItemAttrDisabled, 0);

    } else {

        ChangeMenuItemAttributes(menu, kItalicMenuItemIndex, 0, kMenuItemAttrDisabled);

    }

}

// Update the font panel with the currently selected font. It's important to do this when we activate the window and display the font panel. The act of calling SetFontInfoForSelection with the event target of the specified window is important to direct future font selection events to that window. This could be a specific control if we wanted to handle font selections on a control by control basis.

void UpdateFontPanel(HIWindowRef window)

{

    ArcView                 *arcView;

    CTFontRef               font;

    CTFontDescriptorRef     descriptor;

    // Use the front window if none specified

    if (window == NULL)

        window = FrontNonFloatingWindow();

    // Get the arc view

    arcView = GetArcViewForWindow(window);

    // Get the current font

    font = ArcViewGetFont(arcView);

    descriptor = CTFontCopyFontDescriptor(font);

    verify(descriptor != NULL);

    // Set the font to the font panel, specifying the window as the event target

    verify_noerr(SetFontInfoForSelection(kFontSelectionCoreTextType, 1, (void *)&descriptor, GetWindowEventTarget(window)));

    CFRelease(descriptor);

}