/*

 File: main.c

 Abstract: Implements application and window event handlers. Derived from

 Carbon C Application standard project.

 Version: 1.0

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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

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 */ 

#include <Carbon/Carbon.h>

#include "ArcView.h"

#include "Controls.h"

#include "Fonts.h"

static OSStatus        AppEventHandler(EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon);

static OSStatus        HandleNew();

static OSStatus        WindowEventHandler(EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon);

static IBNibRef        sNibRef;

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

int main(int argc, char* argv[])

{

    OSStatus                    err;

    static const EventTypeSpec    kAppEvents[] =

    {

        { kEventClassCommand, kEventCommandProcess }

    };

    // Register our custom HIObject class before we load the nib

    verify_noerr(ArcViewRegisterClass());

    // Create a Nib reference, passing the name of the nib file (without the .nib extension).

    // CreateNibReference only searches into the application bundle.

    err = CreateNibReference(CFSTR("main"), &sNibRef);

    require_noerr(err, CantGetNibRef);

    // Once the nib reference is created, set the menu bar. "MainMenu" is the name of the menu bar

    // object. This name is set in InterfaceBuilder when the nib is created.

    err = SetMenuBarFromNib(sNibRef, CFSTR("MenuBar"));

    require_noerr(err, CantSetMenuBar);

    // Install our handler for common commands on the application target

    InstallApplicationEventHandler(NewEventHandlerUPP(AppEventHandler),

                                    GetEventTypeCount(kAppEvents), kAppEvents,

                                    0, NULL);

    // Create a new window. A full-fledged application would do this from an AppleEvent handler

    // for kAEOpenApplication.

    HandleNew();

    // Run the event loop

    RunApplicationEventLoop();

CantSetMenuBar:

CantGetNibRef:

    return err;

}

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

static OSStatus

AppEventHandler(EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon)

{

    OSStatus    result = eventNotHandledErr;

    OSType      class = GetEventClass(inEvent);

    UInt32      kind = GetEventKind(inEvent);

    switch (class)

    {

        case kEventClassCommand:

        {

            HICommandExtended cmd;

            verify_noerr(GetEventParameter(inEvent, kEventParamDirectObject, typeHICommand, NULL, sizeof(cmd), NULL, &cmd));

            switch (kind)

            {

                case kEventCommandProcess:

                    switch (cmd.commandID)

                    {

                        case kHICommandNew:

                            result = HandleNew();

                            break;

                        default:

                            break;

                    }

                    break;

                default:

                    break;

            }

            break;

        }   

        default:

            break;

    }

    return result;

}

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

DEFINE_ONE_SHOT_HANDLER_GETTER(WindowEventHandler)

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

static OSStatus

HandleNew()

{

    OSStatus                    err;

    HIWindowRef                 window;

    HIViewRef                   view;

    HIViewID                    viewID;

    // Window events

    static const EventTypeSpec  kWindowEvents[] =

    {

        { kEventClassCommand, kEventCommandProcess },

        { kEventClassWindow, kEventWindowActivated },

        { kEventClassMenu, kEventMenuEnableItems },

        { kEventClassFont, kEventFontSelection }

    };

    // Control events

    static const EventTypeSpec kTextFieldEvents[] = 

    {

        { kEventClassTextField, kEventTextAccepted },

        { kEventClassTextField, kEventTextDidChange }

    };

    // Create a window. "MainWindow" is the name of the window object. This name is set in 

    // InterfaceBuilder when the nib is created.

    err = CreateWindowFromNib(sNibRef, CFSTR("MainWindow"), &window);

    require_noerr(err, CantCreateWindow);

    // Install a window event handler on the window. 

    InstallWindowEventHandler(window, GetWindowEventHandlerUPP(),

                               GetEventTypeCount(kWindowEvents), kWindowEvents,

                               window, (void *)window);

    viewID.signature = kEditTextControlSignature;

    viewID.id = kEditTextControlID;

    // Get the control 

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

    require_noerr(err, CantGetControl);

    // Install a control event handler. We use the window handler for convenience as the control

    // is in the window and there is only one event.

    InstallControlEventHandler(view, GetWindowEventHandlerUPP(),

                                GetEventTypeCount(kTextFieldEvents), kTextFieldEvents,

                                view, (void *)view);

    // Initialize the text

    InitializeTextField(window);

    // Update the text in the window

    UpdateText(window);

    // Update the font for the window

    UpdateFontControls(window);

    UpdateFontPanel(window);

CantGetControl:

    // Position new windows in a staggered arrangement on the main screen

    RepositionWindow(window, NULL, kWindowCascadeOnMainScreen);

    // The window was created hidden, so show it

    ShowWindow(window);

CantCreateWindow:

    return err;

}

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

static OSStatus

WindowEventHandler(EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon)

{

    OSStatus    err = eventNotHandledErr;

    OSType class = GetEventClass(inEvent);

    UInt32 kind = GetEventKind(inEvent);

    switch (class)

    {

        case kEventClassCommand:

        {

            HICommandExtended cmd;

            verify_noerr(GetEventParameter(inEvent, kEventParamDirectObject, typeHICommand, NULL, sizeof(cmd), NULL, &cmd));

            // Get the window for the control  in the command

            HIWindowRef window = HIViewGetWindow(cmd.source.control);

            switch (kind)

            {

                case kEventCommandProcess:

                {

                    switch (cmd.commandID)

                    {

                        // Add your own command-handling cases here

                        case kHICommandBoldFont:

                        {

                            // Make the font bold

                            ToggleFontTrait(window, kCTFontBoldTrait);

                            // Update the font interface elements

                            UpdateFontControls(window);

                            UpdateFontPanel(window);

                            err = noErr;    // Handled the event

                            break;

                        }

                        case kHICommandItalicFont:

                        {

                            // Make the font italic

                            ToggleFontTrait(window, kCTFontItalicTrait);

                            // Update the font interface elements

                            UpdateFontControls(window);

                            UpdateFontPanel(window);

                            err = noErr;    // Handled the event

                            break;

                        }

                        case kHICommandShowHideFontPanel:

                        {

                            // Update the font panel when it is displayed

                            UpdateFontPanel(window);

                            // Don't handle the event

                            break;

                        }

                        // ArcView options

                        case kHICommandShowGlyphBounds:

                        {

                            Boolean state = (HIViewGetValue(cmd.source.control) == kControlCheckBoxCheckedValue);

                            ArcViewSetOptions(GetArcViewForWindow(window), kArcViewShowGlyphBoundsOption, state);

                            err = noErr;    // Handled the event

                            break;

                        }

                        case kHICommandShowLineMetrics:

                        {

                            Boolean state = (HIViewGetValue(cmd.source.control) == kControlCheckBoxCheckedValue);

                            ArcViewSetOptions(GetArcViewForWindow(window), kArcViewShowLineMetricsOption, state);

                            err = noErr;    // Handled the event

                            break;

                        }

                        case kHICommandDimSubstitutedGlyphs:

                        {

                            Boolean state = (HIViewGetValue(cmd.source.control) == kControlCheckBoxCheckedValue);

                            ArcViewSetOptions(GetArcViewForWindow(window), kArcViewDimSubstitutedGlyphsOption, state);

                            err = noErr;    // Handled the event

                            break;

                        }

                        default:

                            break;

                    }

                    break;

                }

                default:

                    break;

            }

            break;

        }

        case kEventClassWindow:

        {

            switch (kind) {

                case kEventWindowActivated:

                {

                    HIWindowRef window;

                    // Get the window from the event

                    verify_noerr(GetEventParameter(inEvent, kEventParamDirectObject, typeWindowRef, NULL, sizeof(window), NULL, &window));

                    // Update the text 

                    UpdateText(window);

                    // Update the font interfaces

                    UpdateFontControls(window);

                    UpdateFontPanel(window);

                    break;

                }

                default:

                    break;

            }

            break;

        }

        case kEventClassMenu:

        {

            switch (kind) {

                case kEventMenuEnableItems:

                {

                    MenuRef menu;

                    // Get the menu for the event

                    verify_noerr(GetEventParameter(inEvent, kEventParamDirectObject, typeMenuRef, NULL, sizeof(menu), NULL, &menu));

                    // Update the format menu. This will validate the font trait items, and swap the Show/Hide Fonts items.

                    if (GetMenuID(menu) == kFormatMenuID) {

                        UpdateFormatMenu(menu);

                    }

                    break;

                }

                default:

                    break;

            }

            break;

        }

        case kEventClassFont:

        {

            switch (kind) {

                case kEventFontSelection:

                {

                    // Change the font for the event

                    ChangeFont(inEvent, (HIWindowRef)inRefcon);

                    // Update the font interface

                    UpdateFontControls((HIWindowRef)inRefcon);

                    break;

                }

                default:

                    break;

            }

            break;

        }

        case kEventClassTextField:

        {

            switch (kind) 

            {

                case kEventTextAccepted:

                {

                    // Get the window from the control in the refcon

                    HIWindowRef window = HIViewGetWindow((HIViewRef)inRefcon);

                    // Update text on end editing

                    UpdateText(window);

                    break;

                }

                case kEventTextDidChange: 

                {

                    // Get the window from the control in the refcon

                    HIWindowRef window = HIViewGetWindow((HIViewRef)inRefcon);

                    CFRange range;

                    // Check to see if we have an inline hole. If there is an unconfirmed range, we have an inline hole and don't want to update the text until the text is confirmed.

                    if (GetEventParameter(inEvent, kEventParamUnconfirmedRange, typeCFRange, NULL, sizeof(CFRange), NULL, &range) != noErr)

                        UpdateText(window);

                    break;

                }

                default:

                    break;

            }

            break;

        }

        default:

            break;

    }

    return err;

}