上一篇文章中我介绍了使用Autodesk Viewer的UI API来给viewer添加自定义工具条的方法，看起来很简单是吧。不过有个问题，就是关于自定义工具条的信息（包括按钮的文本、图标、样式、callback等等）全都散落在代码中，如果要添加或者修改的话，得特别小心的扫描代码，非常容易出错。有没有更好的办法呢？这篇文章就来介绍一下。
既然关于Toolbar button等京城需要更改的部分散落到各处不方便维护，那我就把他们集中到一起独立出来。于是我写了个自定义的toolbarConfig对象，采用JSON格式，刚好符合JavaScript的语法，如果我需要添加或者修改工具条或按钮，只需要修改这个config对象就可以了：
/////////////////////////////////////////////////////////////////////// custom toobar config var toolbarConfig = { ‘id‘: ‘toolbar_id_1‘, ‘containerId‘: ‘toolbarContainer‘, ‘subToolbars‘: [ { ‘id‘: ‘subToolbar_id_non_radio_1‘, ‘isRadio‘: false, ‘visible‘: true, ‘buttons‘: [ { ‘id‘: ‘buttonRotation‘, ‘buttonText‘ : ‘Rotation‘, ‘tooltip‘: ‘Ratate the model at X direction‘, ‘cssClassName‘: ‘glyphicon glyphicon glyphicon-play-circle‘, ‘iconUrl‘ :‘Images/3d_rotation.png‘, ‘onclick‘: buttonRotationClick }, { ‘id‘: ‘buttonExplode‘, ‘buttonText‘: ‘Explode‘, ‘tooltip‘: ‘Explode the model‘, ‘cssClassName‘: ‘‘, ‘iconUrl‘: ‘Images/explode_icon.jpg‘, ‘onclick‘: buttonExplodeClick }
] }, { ‘id‘: ‘subToolbar_id_radio_1‘, ‘isRadio‘: true, ‘visible‘: true, ‘buttons‘: [ { ‘id‘: ‘radio_button1‘, ‘buttonText‘: ‘radio_button1‘, ‘tooltip‘: ‘this is tooltip for radio button1‘, ‘cssClassName‘: ‘‘, ‘iconUrl‘: ‘‘, ‘onclick‘: radioButton1ClickCallback }, { ‘id‘: ‘radio_button2‘, ‘buttonText‘: ‘radio_button2‘, ‘tooltip‘: ‘this is tooltip for radio button2‘, ‘cssClassName‘: ‘‘, ‘iconUrl‘: ‘‘, ‘onclick‘: radioButton2ClickCallback }
] } ]
};
function buttonRotationClick(e) {
}
function buttonExplodeClick() { }
function button2ClickCallback(e) { alert(‘Button2 is clicked‘);}function radioButton1ClickCallback(e) { alert(‘radio Button1 is clicked‘);}function radioButton2ClickCallback(e) { alert(‘radio Button2 is clicked‘);}
接下来创建一个工具方法，解读这个toolbarConfig并利用viewer UI API来创建对于的工具条和按钮，使用方法也和简单：
////add custom toolbar , usage example:
//addToolbar(toolbarConfig);
////////////////////////////////////////////////////////////////////////////
function addToolbar(toolbarConfig, viewer) {
//find the container element in client webpage first
var containter = document.getElementById(toolbarConfig.containerId);
// if no toolbar container on client‘s webpage, create one and append it to viewer
if (!containter) {
containter = document.createElement(‘div‘);
containter.id = ‘custom_toolbar‘;
//‘position: relative;top: 75px;left: 0px;z-index: 200;‘;
containter.style.position = ‘relative‘;
containter.style.top = ‘75px‘;
containter.style.left = ‘0px‘;
containter.style.zIndex= ‘200‘;
viewer.clientContainer.appendChild(containter);
}
//create a toolbar
var toolbar = new Autodesk.Viewing.UI.ToolBar(containter);
for (var i = 0, len = toolbarConfig.subToolbars.length; i < len; i++) {
var stb = toolbarConfig.subToolbars[i];
//create a subToolbar
var subToolbar = toolbar.addSubToolbar(stb.id, stb.isRadio);
subToolbar.setToolVisibility(stb.visible);
//create buttons
for (var j = 0, len2 = stb.buttons.length; j < len2; j++) {
var btn = stb.buttons[j];
var button = Autodesk.Viewing.UI.ToolBar.createMenuButton(btn.id, btn.tooltip, btn.onclick);
//set css calss if availible
if (btn.cssClassName) {
button.className = btn.cssClassName;
}
//set button text if availible
if (btn.buttonText) {
var btnText = document.createElement(‘span‘);
btnText.innerText = btn.buttonText;
button.appendChild(btnText);
}
//set icon image if availible
if (btn.iconUrl) {
var ico = document.createElement(‘img‘);
ico.src = btn.iconUrl;
ico.className = ‘toolbar-button‘;
button.appendChild(ico);
}
//add button to sub toolbar
toolbar.addToSubToolbar(stb.id, button);
}
}
下面就是运行效果了：
为Autodesk Viewer添加自定义工具条的更好方法