// Copyright © 2000 by Apple Computer, Inc., All Rights Reserved.
//
// You may incorporate this Apple sample code into your own code
// without restriction. This Apple sample code has been provided "AS IS"
// and the responsibility for its operation is yours. You may redistribute
// this code, but you are not permitted to redistribute it as
// "Apple sample code" after having made changes.
// ********************************
// application-specific functions *
// ********************************

// store variables to control where the popup will appear relative to the cursor position
// positive numbers are below and to the right of the cursor, negative numbers are above and to the left
var xOffset = 30;
var yOffset = -5;

function showPopup(targetObjectId, eventObj) {
    if (eventObj) {
        // hide any currently-visible popups
        hideCurrentPopup();
	// stop event from bubbling up any farther
        eventObj.cancelBubble = true;
	// move popup div to current cursor position 
        // (add scrollTop to account for scrolling for IE)
        var newXCoordinate = (eventObj.pageX) ? eventObj.pageX + xOffset : eventObj.x + xOffset + ((document.body.scrollLeft) ? document.body.scrollLeft : 0);
        var newYCoordinate = (eventObj.pageY) ? eventObj.pageY + yOffset : eventObj.y + yOffset + ((document.body.scrollTop) ? document.body.scrollTop : 0);
        moveObject(targetObjectId, newXCoordinate, newYCoordinate);
	// and make it visible
        if (changeObjectVisibility(targetObjectId, 'visible')) {
            // if we successfully showed the popup
            // store its Id on a globally-accessible object
            window.currentlyVisiblePopup = targetObjectId;
            return true;
        } else {
            // we couldn't show the popup, boo hoo!
            return false;
        }
    } else {
        // there was no event object, so we won't be able to position anything, so give up
        return false;
    }
} // showPopup

function hideCurrentPopup() {
    // note: we've stored the currently-visible popup on the global object window.currentlyVisiblePopup
    if (window.currentlyVisiblePopup) {
        changeObjectVisibility(window.currentlyVisiblePopup, 'hidden');
        window.currentlyVisiblePopup = false;
    }
} // hideCurrentPopup



// ***********************
// hacks and workarounds *
// ***********************

// initialize hacks whenever the page loads
window.onload = initializeHacks;

// setup an event handler to hide popups for generic clicks on the document
document.onclick = hideCurrentPopup;

function initializeHacks() {
    // this ugly little hack resizes a blank div to make sure you can click
    // anywhere in the window for Mac MSIE 5
    if ((navigator.appVersion.indexOf('MSIE 5') != -1)
            && (navigator.platform.indexOf('Mac') != -1)
            && getStyleObject('blankDiv')) {
        window.onresize = explorerMacResizeFix;
    }
    resizeBlankDiv();
    // this next function creates a placeholder object for older browsers
    createFakeEventObj();
}

function createFakeEventObj() {
    // create a fake event object for older browsers to avoid errors in function call
    // when we need to pass the event object to functions
    if (!window.event) {
        window.event = false;
    }
} // createFakeEventObj

function resizeBlankDiv() {
    // resize blank placeholder div so IE 5 on mac will get all clicks in window
    if ((navigator.appVersion.indexOf('MSIE 5') != -1)
            && (navigator.platform.indexOf('Mac') != -1)
            && getStyleObject('blankDiv')) {
        getStyleObject('blankDiv').width = document.body.clientWidth - 20;
        getStyleObject('blankDiv').height = document.body.clientHeight - 20;
    }
}

function explorerMacResizeFix() {
    location.reload(false);
}