/*
File:		HelloController.m

Description: 	This is the implementation file for the class that handles the interaction between the GUI
                and the Hello objects, allowing you to switch messages and receiver objects.  Calling Help
                Viewer to display our help file is also handled here.

Author:		MCF

Copyright: 	© Copyright 2000 Apple Computer, Inc. All rights reserved.

Disclaimer:	IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.
                ("Apple") in consideration of your agreement to the following terms, and your
                use, installation, modification or redistribution of this Apple software
                constitutes acceptance of these terms.  If you do not agree with these terms,
                please do not use, install, modify or redistribute this Apple software.

                In consideration of your agreement to abide by the following terms, and subject
                to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs
                copyrights in this original Apple software (the "Apple Software"), to use,
                reproduce, modify and redistribute the Apple Software, with or without
                modifications, in source and/or binary forms; provided that if you redistribute
                the Apple Software in its entirety and without modifications, you must retain
                this notice and the following text and disclaimers in all such redistributions of
                the Apple Software.  Neither the name, trademarks, service marks or logos of
                Apple Computer, Inc. may be used to endorse or promote products derived from the
                Apple Software without specific prior written permission from Apple.  Except as
                expressly stated in this notice, no other rights or licenses, express or implied,
                are granted by Apple herein, including but not limited to any patent rights that
                may be infringed by your derivative works or by other works in which the Apple
                Software may be incorporated.

                The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO
                WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
                WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
                COMBINATION WITH YOUR PRODUCTS.

                IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
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Change History (most recent first):

09/2000 - MCF - initial version

*/

//we use #import to make sure the header is only read in once
#import "HelloController.h"

@implementation HelloController

//This method is called when the user picks a different message 
//to display by clicking a different radio button
- (IBAction)switchMessage:(id)sender
{
        //sender is the NSMatrix containing the radio buttons.
        //We ask the sender for which row (radio button) is selected and add one
        //to compensate for counting from zero.
        int which=[sender selectedRow]+1;
        //We now set our NSButton's action to be the message corresponding to the radio button selection.
        //+[NSString stringWithFormat:...] is used to concatenate "message" and the message number.  
        //NSSelectorFromString converts the message name string to an actual message structure that
        //Objective-C can use.
        [helloButton setAction:NSSelectorFromString([NSString stringWithFormat:@"%@%d:",@"message",which])];        
}

//This method is called when the user picks a different object to 
//receive messages using the PopUp menu
- (IBAction)switchObject:(id)sender
{
        //sender is the NSPopUpMenu containing Hello object choices.
        //We ask the sender for which menu item is selected and add one
        //to compensate for counting from zero.
        int which=[sender indexOfSelectedItem]+1;
        
        //Based on which menu item is selected, we set the target (the receiving object)
        //of the helloButton to point to either hello1 or hello2.
        if (which==1)
        [helloButton setTarget:hello1];
        else
        [helloButton setTarget:hello2];
}

//awakeFromNib is called when this object is done being unpacked from the nib file;
//at this point, we can do any needed initialization before turning app control over to the user
- (void)awakeFromNib
{
    //Bring the window to the front and make it the receiving window for key events
    [[helloButton window] makeKeyAndOrderFront:self];
}

//This method is called when the user selects "HelloCocoa Help" from the Help menu
- (IBAction)showHelp:(id)sender
{
    //We call -[NSWorkspace openFile:withApplication:] to open our html file with the Help Viewer,
    //using -[NSBundle pathForResource:ofType:] to help us find our html file
    NSString *path = [[NSBundle mainBundle] pathForResource:@"ReadMe" ofType:@"html"];
    if (path) {
        [[NSWorkspace sharedWorkspace] openFile:path withApplication:@"Help Viewer"];
    }
}

@end
