progressbar.jsx

//构建progressbar核心逻辑，非public方法，仅jsx内部调用
function createProgressWindow(title, message, total, hasCancelButton) {  
  this.winRef = null;
  var win; 
  if (title == null) {  
    title = "Work in progress";  
  }  
  if (message == null) {  
    message = "Please wait...";  
  }  
  if (hasCancelButton == null) {  
    hasCancelButton = false;  
  }  
  win = new Window("palette", title, undefined);  
  this.winRef = win;
  win.bar = win.add("progressbar", {  
    x: 20,  
    y: 12,  
    width: 300,  
    height: 20  
  }, 0, total);  
  win.stMessage = win.add("statictext", {  
    x: 10,  
    y: 36,  
    width: 320,  
    height: 20  
  }, "" + message);  
  win.stMessage.justify = 'center';  
  this.reset = function(message) {  
    win.bar.value = 0;  
    win.stMessage.text = message;  
    return win.update();  
  };  
  this.updateProgress = function(perc, message) {  
    if (perc != null) { 
      win.bar.value = perc;  
    }  
    if (message != null) {  
      win.stMessage.text = message;  
    }  
      app.refresh();//这句话非常关键
    if (perc == win.bar.maxvalue) {
        this.close();  
    }
    return;
  };  
  this.close = function() {  
    win.close();  
    win=null;//该句是必须的,否则win关闭后，切换到其他应用再回到ps后，win又会出现
    this.winRef = null;
  };
  if (hasCancelButton) {  
    win.cancelButton = win.add('button', undefined, 'Cancel');  
    win.cancelButton.onClick = function() {  
        this.winRef.close();
        this.winRef = null; 
        //win = null;//执行该句会导致崩溃
        //throw new Error('User canceled the pre-processing!');  
    };  
  }  
  win.center(win.parent);  
  win.show();
  return this;
};