How to change the path of a picture in magicmirror , using MMM-imageSlideshow

[emrhssla]

I’m using three modules.
MMM-Testpython (This is the module I’m developing.)
MMM-imageSlideshow
MMM-Modulebar1

When I click the click button implemented in the Testpython module code, I want to change the path of the file where the picture is stored. So I want to show you a picture of a different path.

modules/MMM-Testpython/nothing ->modules/MMM-Testpython/before

I implemented it using “sendnotification” in MMM-Testpython, “notificationreceived” in MMM-imageSlideshow.

It was confirmed that the output was successful on the console window.

before click

after click

However, the picture does not change on screen.

The code is as follows.
MMM-imageSlideshow
I’ve just modified the underline for @@@@@@@@@@@@@@@

/* global Module */

/* MMM-ImageSlideshow.js
 * 
 * Magic Mirror
 * Module: MMM-ImageSlideshow
 * 
 * Magic Mirror By Michael Teeuw http://michaelteeuw.nl
 * MIT Licensed.
 * 
 * Module MMM-ImageSlideshow By Adam Moses http://adammoses.com
 * MIT Licensed.
 */
 
Module.register("MMM-ImageSlideshow", {
	// Default module config.
	defaults: {
        // an array of strings, each is a path to a directory with images
        imagePaths: [ 'modules/MMM-Testpython/nothing' ],
        // the speed at which to switch between images, in milliseconds
		slideshowSpeed: 10 * 1000,
        // if zero do nothing, otherwise set width to a pixel value
        fixedImageWidth: 0,
        // if zero do nothing, otherwise set height to a pixel value        
        fixedImageHeight: 0,
        // if true randomize image order, otherwise do alphabetical
        randomizeImageOrder: false,
        // if true combine all images in all the paths
        // if false each path with be viewed seperately in the order listed
        treatAllPathsAsOne: false,
        // if true, all images will be made grayscale, otherwise as they are
        makeImagesGrayscale: false,
        // list of valid file extensions, seperated by commas
        validImageFileExtensions: 'bmp,jpg,gif,png',
		// a delay timer after all images have been shown, to wait to restart (in ms)
		delayUntilRestart: 0,
	},
    // load function
	start: function () {
        // add identifier to the config
        this.config.identifier = this.identifier;
        // ensure file extensions are lower case
        this.config.validImageFileExtensions = this.config.validImageFileExtensions.toLowerCase();
        // set no error
		this.errorMessage = null;
        if (this.config.imagePaths.length == 0) {
            this.errorMessage = "MMM-ImageSlideshow: Missing required parameter."
        }
        else {
            // create an empty image list
            this.imageList = [];
            // set beginning image index to -1, as it will auto increment on start
            this.imageIndex = -1;
            // ask helper function to get the image list
            this.sendSocketNotification('IMAGESLIDESHOW_REGISTER_CONFIG', this.config);
			// do one update time to clear the html
			this.updateDom();
			// set a blank timer
			this.interval = null;
        }
	},
	// Define required scripts.
	getStyles: function() {
        // the css contains the make grayscale code
		return ["imageslideshow.css"];
	},    
	// the socket handler
	socketNotificationReceived: function(notification, payload) {
		// if an update was received
		if (notification === "IMAGESLIDESHOW_FILELIST") {
			// check this is for this module based on the woeid
			if (payload.identifier === this.identifier)
			{
				// set the image list
				this.imageList = payload.imageList;
                // if image list actually contains images
                // set loaded flag to true and update dom
                if (this.imageList.length > 0) {
                    this.loaded = true;
                    this.updateDom();
					// set the timer schedule to the slideshow speed			
					var self = this;
					this.interval = setInterval(function() {
						self.updateDom();
						}, this.config.slideshowSpeed);					
                }
			}
		}
    },    
	// Override dom generator.
	getDom: function () {
		var wrapper = document.createElement("div");
        // if an error, say so (currently no errors can occur)
        if (this.errorMessage != null) {
            wrapper.innerHTML = this.errorMessage;
        }
        // if no errors
        else {
            // if the image list has been loaded
            if (this.loaded === true) {
				// if was delayed until restart, reset index reset timer
				if (this.imageIndex == -2) {
					this.imageIndex = -1;
					clearInterval(this.interval);
					var self = this;
					this.interval = setInterval(function() {
						self.updateDom(0);
						}, this.config.slideshowSpeed);						
				}				
                // iterate the image list index
                this.imageIndex += 1;
				// set flag to show stuff
				var showSomething = true;
                // if exceeded the size of the list, go back to zero
                if (this.imageIndex == this.imageList.length) {
					// if delay after last image, set to wait
					if (this.config.delayUntilRestart > 0) {
						this.imageIndex = -2;
						wrapper.innerHTML = " ";
						showSomething = false;
						clearInterval(this.interval);
						var self = this;
						this.interval = setInterval(function() {
							self.updateDom(0);
							}, this.config.delayUntilRestart);									
					}
					// if not reset index
					else
						this.imageIndex = 0;
				}
				if (showSomething) {
					// create the image dom bit
					var image = document.createElement("img");
					// if set to make grayscale, flag the class set in the .css file
					if (this.config.makeImagesGrayscale)
						image.className = "desaturate";
					// create an empty string
					var styleString = '';
					// if width or height or non-zero, add them to the style string
					if (this.config.fixedImageWidth != 0)
						styleString += 'width:' + this.config.fixedImageWidth + 'px;';
					if (this.config.fixedImageHeight != 0)
						styleString += 'height:' + this.config.fixedImageHeight + 'px;';
					// if style string has antyhing, set it
					if (styleString != '')
						image.style = styleString;
					// set the image location
					image.src = this.imageList[this.imageIndex];
					// ad the image to the dom
					wrapper.appendChild(image);					
				}
            }
            else {
                // if no data loaded yet, empty html
                wrapper.innerHTML = " ";
            }
        }
        // return the dom
		return wrapper;
	}, 
	// @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ my code @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
	notificationReceived: function(notification, payload) {
		Log.info(this.name + " - received notification: " + notification);
		if(notification === "BEFORE"){
			console.log("this payload : "+payload)
			this.config.imagePaths=payload
			var self = this;
			self.updateDom();
			console.log("this config config payload : "+this.config.imagePaths)
		}
		
	}
});

MMM-Testpython

var Testpythons;
Module.register("MMM-Testpython", {

    defaults: {},
    start: function (){
        Testpythons = this;
    },
  
  getDom: function() {
    var element = document.createElement("div")
    element.className = "myContent"
    element.id="divid"
    element.innerHTML = "Hello, World!!! " + this.config.foo
    var subElement = document.createElement("p")
    subElement.innerHTML = "Click" 
    subElement.id = "clickid"
    element.appendChild(subElement)
    return element
  },
  
  notificationReceived: function(notification, payload, sender) {
    switch(notification) {
      case "DOM_OBJECTS_CREATED":
      var elem = document.getElementById("clickid")
      elem.addEventListener("click", () => {
        // send!!
        Testpythons.sendNotification('BEFORE','modules/MMM-Testpython/before');
        elem.innerHTML = "click success"       
      }) 
        break
    }
  }

})

[sdetweil]

@emrhssla i think this is a caching problem… the ‘file’ was already loaded…

see this discussion about adding a string to the end of the image filename to make it ‘unique’
thus not reading from cache

https://stackoverflow.com/questions/728616/disable-cache-for-some-images

however, this will add a new image to be cached… eventually growing maybe beyond memory limits…
another way is to disable caching in electron

in MagicMirror/js/electron.js
add this line

function createWindow() {
    app.commandLine.appendSwitch('--disable-http-cache');  //< -------- added
	var electronOptionsDefaults = {

[sdetweil]

@emrhssla because ImageSlideshow is using hard coded paths

imagePaths: [ ‘modules/MMM-Testpython/nothing’ ],

U must add the before path to the list

[emrhssla]

@sdetweil
There’s no other way.
Then there’s one more question. Originally, MMM-Testpython is a module that uses python files to capture pictures.

I tried to show the captured pictures using MMM-imageSlideshow.
To sum up, what I want is:
1.Run the magic mirror.
2.MMM-imageSlideShow runs to show the pictures in the folder
3.Use MMM-Testpython to capture it with a webcam.
4.Replace original photos by covering them.
------I’ve been successful so far----
5. MMM-imageSlideshow module has been updated to show only captured pictures (failed)

So what I’m wondering is if I can update MMM-imageSlideshow in the Magic Mirror.

Updatedom() will not be renewed.

[sdetweil]

@emrhssla what do u mean by update ImageSlideshow?

Change it’s paths dynamically?
I dont think so

[emrhssla]

@sdetweil
not about path update

about replacing a picture with an overwritten one dynamically.

[sdetweil]

@emrhssla should be able to without problem… either write code to do it… or launch a shell cp command (copy)

[sdetweil]

also, MMM-ImageSlideshow only gets the file list once… then reshows it over and over…

MMM-ImagesPhotos refreshes the list every 60 seconds… ( getInterval: 60000)

[emrhssla]

MMM-Testpython.js

var Testpythons;
Module.register("MMM-Testpython", {

    defaults: {},
    start: function (){
        Testpythons = this;
    },
  
  getDom: function() {
    var element = document.createElement("div")
    element.className = "myContent"
    element.id="divid"
    element.innerHTML = "Hello, World!!! " + this.config.foo
    var subElement = document.createElement("p")
    subElement.innerHTML = "Click" 
    subElement.id = "clickid"
    element.appendChild(subElement)
    return element
  },
  
  notificationReceived: function(notification, payload, sender) {
    switch(notification) {
      case "DOM_OBJECTS_CREATED":
      var elem = document.getElementById("clickid")
      elem.addEventListener("click", () => {
        //
        Testpythons.sendSocketNotification("TEST")
        //
        console.log(" click success !")
        elem.innerHTML = "click success"       
      }) 
        break
    }
  },
  socketNotificationReceived: function(notification, payload) {
    switch(notification) {
      case "AFTERCLICK":
        console.log("Socket recevied payload : "+payload)
        var elemk = document.getElementById("clickid")
        //
        Testpythons.sendNotification('SHOWCHANGEDIMAGE');
        //
        elemk.innerHTML = payload
        break
    }
  }

})

node_helper.js(in MMM-Testpython)

var NodeHelper = require("node_helper");
var {PythonShell} = require('python-shell');
var socketTestpython;
module.exports = NodeHelper.create({
  start: function() {
    socketTestpython=this;
    console.log(this.name+"node_helper started")
  },
  
  socketNotificationReceived: function(notification, payload) {
    switch(notification) {
      case "TEST":
        console.log("notification : " + notification)
	    PythonShell.run('/home/pi/Desktop/BeautyMirror/modules/MMM-Testpython/before.py', null, function (err, result) {
            if (err) throw err;
            console.log(result);          
            socketTestpython.sendSocketNotification("AFTERCLICK",result);
          });
	       
        break
    }
  }
}) 

MMM-ImageSlideshow.js
I added only the following code from the original module code.

notificationReceived: function(notification, payload) {
		Log.info(this.name + " - received notification: " + notification);
		if(notification === "DOM_OBJECTS_CREATED"){
			this.hide()
		}
		
		if(notification === "SHOWCHANGEDIMAGE"){
			var self = this;
			self.updateDom();
			self.show();
		}
	}

console is success…

image before capture

capture image

after caputure

[emrhssla]

@sdetweil
not changed in screen omg…

[sdetweil]

@emrhssla if u stop mirror and restart, does the new image appear? (as u overlaid the old one)…

if not, then your overlay function doesn’t work…