RMMV Displaying a window while the game is active?

[bishiba]

So the question is wheter or note the post name is possible. I know that you can add sprites and such.

But if I would like to have a window that displays in the top left constantly during play, is that doable? I would've tried but I am currently not at home, and if it's possible I'd just like to know where to start when I get back

best regards,
Bishiba

 

[caethyril]

Like a HUD? Yes, it's possible: create a new window instance and use the scene's addWindow method to add it to the scene~

 

[bishiba]

Like a HUD? Yes, it's possible: create a new window instance and use the scene's addWindow method to add it to the scene~

Alright, been trying to get this window to show. But I am getting the error:


It is pointing to this function:

Scene_Base.prototype.addWindow = function(window) {
    this._windowLayer.addChild(window);
};

I don't understand why the Scene._windowLayer would be undefined?

And here is the function I am using, it doesn't have a feature, it's just me trying to get a window to show.

Scene_Map.prototype.create = function() {
    Scene_Base.prototype.create.call(this);
    this._transfer = $gamePlayer.isTransferring();
    var mapId = this._transfer ? $gamePlayer.newMapId() : $gameMap.mapId();
    DataManager.loadMapData(mapId);
    this.createMapWindow();
};

Scene_Map.prototype.createMapWindow = function() {
    var x = 44;
    var y = 22;
    var width = 66;
    var height = 400;
    this._mapWindow = new Window_MapWindow(x, y, width, height);
    this.addWindow(this._mapWindow);
};

function Window_MapWindow() {
    this.initialize.apply(this, arguments);
}

Window_MapWindow.prototype = Object.create(Window_Base.prototype);
Window_MapWindow.prototype.constructor = Window_MapWindow;

Window_MapWindow.prototype.initialize = function(x, y, width, height) {
    Window_Base.prototype.initialize.call(this, x, y, width, height);
    this._touching = false;
    this._enemy = null;
};

EDIT:
Changed the two functions in my code. Not getting the error, but I am not getting any window displayed.

Scene_Map.prototype.create = function() {
    Scene_Base.prototype.create.call(this);
    this._transfer = $gamePlayer.isTransferring();
    var mapId = this._transfer ? $gamePlayer.newMapId() : $gameMap.mapId();
    DataManager.loadMapData(mapId);
    this.createWindowLayer()
    this.createMapWindow();
};

Scene_Map.prototype.createMapWindow = function() {
    var x = 44;
    var y = 22;
    var width = 600;
    var height = 400;
    this._mapWindow = new Window_MapWindow(x, y, width, height);
    this.addWindow(this._mapWindow);
};

 

[caethyril]

It's because the window layer will generally not have been added by the end of the scene's create method. The scene creates its display objects only after the map data has loaded:

Scene_Map.prototype.onMapLoaded = function() {
    if (this._transfer) {
        $gamePlayer.performTransfer();
    }
    this.createDisplayObjects();
};

Instead, you should patch the createDisplayObjects method, which gets called when the database has loaded. E.g.

// Private scope to avoid naming clashes
(function() {
  // Store original method
  var _Scene_Map_createDisplayObjects = Scene_Map.prototype.createDisplayObjects;
  // Define override
  Scene_Map.prototype.createDisplayObjects = function() {
    // Invoke stored method
    _Scene_Map_createDisplayObjects.apply(this, arguments);
    // Run extra code
    this.createMapWindow();
  };
})();

Also, note that a patch/alias, like I've used here, usually lets you write less code than a full override and gives a better chance of compatibility with other plugins~

Edit: I didn't see your edit before, sorry.

EDIT:
Changed the two functions in my code. Not getting the error, but I am not getting any window displayed.

Scene_Map.prototype.create = function() {
    Scene_Base.prototype.create.call(this);
    this._transfer = $gamePlayer.isTransferring();
    var mapId = this._transfer ? $gamePlayer.newMapId() : $gameMap.mapId();
    DataManager.loadMapData(mapId);
    this.createWindowLayer()
    this.createMapWindow();
};
// snip //

The window layer is re-created when the map data loads, which is why this doesn't work. createDisplayObjects is the way to go!