Removed unused import

This reverts commit 012fe4bc4a.

bin/testrunner.js

@@ -7,7 +7,8 @@
  */
 
 const puppeteer = require('puppeteer');
-const fs = require("fs")
+const fs_bare = require("fs") // required for fs-extra
+const fs = require("fs-extra")
 const path = require("path")
 const start_dir = process.cwd()
 const start_file = path.join(start_dir,"lib","index.html")
@@ -39,18 +40,24 @@ async function makeScreenshot(href){
     page.once("load",logPageEvent)
 
     await page.goto(href)
+    href = href.replace("file:///","")
     const fname = path.parse(href).name
-
+    let fpath
     if (fname != "index"){
         image_url = href.replace(fname + ".html" ,"thumbnails/" + fname + ".png")
+        fpath = href.replace(fname + ".html", "thumbnails")
     }
     else{
         image_url = href.replace(fname + ".html" ,"thumbnail.png")
+        fpath = href.replace(fname + ".html", "")
     }
-    image_url = image_url.replace("file:///","")
+    // image_url = image_url.replace("file:///","")
+    // fpath = fpath.replace("file:///","")
 
     page.removeAllListeners()
 
+    fs.ensureDir(fpath)
+
     await page.screenshot({path: image_url});
     await browser.close();
 }

dist/iwmlib.js

@@ -2336,8 +2336,6 @@
         onMouseWheel(event) {
             if (this.capture(event) && this.target.onMouseWheel) {
                 this.target.onMouseWheel(event);
-            } else {
-                //console.warn('Target has no onMouseWheel callback')
             }
         }
 
@@ -2531,8 +2529,6 @@
                 }
                 if (this.target.onMouseWheel) {
                     this.target.onMouseWheel(event);
-                } else {
-                    //console.warn('Target has no onMouseWheel callback', this.target)
                 }
             }
         }
@@ -2999,11 +2995,16 @@
             }
         }
 
+        _throwDeltaTime() {
+            let t = performance.now();
+            let dt = t - this.lastframe;
+            this.lastframe = t;
+            return dt
+        }
+
         animateThrow(time) {
             if (this.velocity != null) {
-                let t = performance.now();
+                let dt = this._throwDeltaTime();
-                let dt = t - this.lastframe;
-                this.lastframe = t;
                 // console.log("animateThrow", dt)
                 let next = this.nextVelocity(this.velocity);
                 let prevLength = Points.length(this.velocity);
@@ -4206,10 +4207,7 @@
                 let event = new ResizeEvent(this, { width: w, height: h });
                 this.onResize(event);
             }
-            if (this.resizeButton != null) {
+            if (this.resizeButton != null) ;
-                // this.resizeButton.style.width = 50/this.scale+"px"
-                // this.resizeButton.style.height = 50/this.scale+"px"
-            }
         }
 
         startResize(e) {
@@ -4260,7 +4258,7 @@
                 let resizeW = r * Math.cos(Angle.degree2radian(phiCorrected));
                 let resizeH = -r * Math.sin(Angle.degree2radian(phiCorrected));
 
-                if (this.element.offsetWidth + resizeW / this.scale > this.width * 0.3 && this.element.offsetHeight + resizeH / this.scale > this.height * 0.3) TweenLite.to(this.element, 0, { width: this.element.offsetWidth + resizeW / this.scale, height: this.element.offsetHeight + resizeH / this.scale });
+                if ((this.element.offsetWidth + resizeW) / this.scale > this.width * 0.5 / this.scale && (this.element.offsetHeight + resizeH) / this.scale > this.height * 0.3  / this.scale) TweenLite.to(this.element, 0, { width: this.element.offsetWidth + resizeW / this.scale, height: this.element.offsetHeight + resizeH / this.scale });
 
                 this.oldX = e.clientX;
                 this.oldY = e.clientY;

dist/iwmlib.pixi.js

@@ -5500,8 +5500,6 @@
         onMouseWheel(event) {
             if (this.capture(event) && this.target.onMouseWheel) {
                 this.target.onMouseWheel(event);
-            } else {
-                //console.warn('Target has no onMouseWheel callback')
             }
         }
 
@@ -5695,8 +5693,6 @@
                 }
                 if (this.target.onMouseWheel) {
                     this.target.onMouseWheel(event);
-                } else {
-                    //console.warn('Target has no onMouseWheel callback', this.target)
                 }
             }
         }
@@ -6163,11 +6159,16 @@
             }
         }
 
+        _throwDeltaTime() {
+            let t = performance.now();
+            let dt = t - this.lastframe;
+            this.lastframe = t;
+            return dt
+        }
+
         animateThrow(time) {
             if (this.velocity != null) {
-                let t = performance.now();
+                let dt = this._throwDeltaTime();
-                let dt = t - this.lastframe;
-                this.lastframe = t;
                 // console.log("animateThrow", dt)
                 let next = this.nextVelocity(this.velocity);
                 let prevLength = Points.length(this.velocity);
@@ -7208,10 +7209,7 @@
                 let event = new ResizeEvent(this, { width: w, height: h });
                 this.onResize(event);
             }
-            if (this.resizeButton != null) {
+            if (this.resizeButton != null) ;
-                // this.resizeButton.style.width = 50/this.scale+"px"
-                // this.resizeButton.style.height = 50/this.scale+"px"
-            }
         }
 
         startResize(e) {
@@ -7262,7 +7260,7 @@
                 let resizeW = r * Math.cos(Angle.degree2radian(phiCorrected));
                 let resizeH = -r * Math.sin(Angle.degree2radian(phiCorrected));
 
-                if (this.element.offsetWidth + resizeW / this.scale > this.width * 0.3 && this.element.offsetHeight + resizeH / this.scale > this.height * 0.3) TweenLite.to(this.element, 0, { width: this.element.offsetWidth + resizeW / this.scale, height: this.element.offsetHeight + resizeH / this.scale });
+                if ((this.element.offsetWidth + resizeW) / this.scale > this.width * 0.5 / this.scale && (this.element.offsetHeight + resizeH) / this.scale > this.height * 0.3  / this.scale) TweenLite.to(this.element, 0, { width: this.element.offsetWidth + resizeW / this.scale, height: this.element.offsetHeight + resizeH / this.scale });
 
                 this.oldX = e.clientX;
                 this.oldY = e.clientY;
@@ -7803,11 +7801,14 @@
         }
     }
 
+    /* ES Lint  */
+    /* globals PIXI, console*/
+
     const registeredTiles = new Map();
-    const pendingTiles = new Map();
+    // const pendingTiles = new Map()
     /** Implements a baseTexture cache. The last textures are kept for reuse  */
-    const keepBaseTextures = 0;
+    let keepTextures = 0;
-    const keptBaseTextures = [];
+    const keptTextures = [];
 
     /** The current Tile implementation simply uses PIXI.Sprites.
      *
@@ -7828,8 +7829,8 @@
          * @param {*} value
          * @memberof Tile
          */
-        static enableKeepBaseTextures(value = 1000) {
+        static enableKeepTextures(value = 1000) {
-            keepBaseTextures = value;
+            keepTextures = value;
         }
 
         /**
@@ -7839,25 +7840,14 @@
          * @param {*} url
          * @memberof Tile
          */
-        static schedule(url) {
+       /* static schedule(url) {
-            let count = 0;
+            let count = 0
             if (pendingTiles.has(url)) {
-                count = pendingTiles.get(url);
+                count = pendingTiles.get(url)
             }
-            pendingTiles.set(url, count + 1);
+            pendingTiles.set(url, count + 1)
             // console.log("Tile.scheduled", url, pendingTiles.size)
-        }
+        } */
-
-        /**
-         * Returns true iff the url is pending
-         *
-         * @static
-         * @returns
-         * @memberof Tile
-         */
-        static isPending() {
-            return pendingTiles.has(url) && pendingTiles.get(url) > 0
-        }
 
         /**
          * Removes the given url from pending urls.
@@ -7866,17 +7856,37 @@
          * @param {*} url
          * @memberof Tile
          */
-        static unschedule(url) {
+        /* static unschedule(url) {
             if (pendingTiles.has(url)) {
-                let count = pendingTiles.get(url);
+                let count = pendingTiles.get(url)
                 if (count > 1) {
-                    pendingTiles.set(url, count - 1);
+                    pendingTiles.set(url, count - 1)
                 }
                 else {
-                    pendingTiles.clear(url);
+                    pendingTiles.clear(url)
                 }
             }
             // console.log("Tile.unscheduled", url, pendingTiles.size)
+        } */
+
+
+        /**
+         * Returns true iff the url is pending
+         *
+         * @static
+         * @param {*} url
+         * @returns
+         * @memberof Tile
+         */
+        /*static isPending(url) {
+            return pendingTiles.has(url) && pendingTiles.get(url) > 0
+        } */
+
+        static isObsolete(url) {
+            if (registeredTiles.has(url) && registeredTiles.get(url) > 0) {
+                return false
+            }
+            return true
         }
 
         /**
@@ -7901,7 +7911,7 @@
          * @memberof Tile
          */
         register(url, debug = false) {
-            Tile.unschedule(url);
+            //Tile.unschedule(url)
             if (registeredTiles.has(url)) {
                 let tiles = registeredTiles.get(url);
                 tiles.add(this);
@@ -7924,6 +7934,7 @@
             tiles.delete(this);
             if (tiles.size == 0) {
                 registeredTiles.delete(this.url);
+                return 0
             }
             return tiles.size
         }
@@ -7934,28 +7945,27 @@
          * @param {*} options  Part of the PIXI API, but ignored in the implementation
          * @memberof Tile
          */
-        destroy(options, debug = true) {
+        destroy(options, debug = false) {
             let count = this.unregister();
 
-            if (keepBaseTextures > 0) {
+            if (keepTextures > 0) {
-                keptBaseTextures.push({ url: this.url, texture: this.texture.baseTexture});
+                keptTextures.push({ url: this.url, texture: this.texture });
 
                 let opts = { children: true, texture: false, baseTexture: false };
                 if (debug) console.log("Tile.destroy", registeredTiles.size, opts);
                 super.destroy(opts);
 
-                while(keptBaseTextures.length > keepBaseTextures) {
+                while (keptTextures.length > keepTextures) {
-                    let {url, texture} = keptBaseTextures.shift();
+                    let { url, texture } = keptTextures.shift();
-                    let tiles = registeredTiles.get(url);
+                    if (Tile.isObsolete(url)) {
-                    if (tiles.size > 0 && !Tile.isPending(url)) {
+                        texture.destroy(true); // Destroy base as well
-                        texture.destroy();
+                        if (debug) console.log("Destroying texture and baseTexture", url);
-                        if (debug) console.log("Destroying baseTexture", url);
                     }
                 }
             }
             else {
                 // No longer registered and not pending
-                if (count <= 0 && !Tile.isPending(url)) {
+                if (count <= 0) { // && !Tile.isPending(this.url)
                     let opts = { children: true, texture: true, baseTexture: true };
                     super.destroy(opts);
                     if (debug) console.log("Tile.destroy", registeredTiles.size, opts);
@@ -7971,7 +7981,6 @@
                     this.visible = false;
                 }
             }
-            
         }
 
         /**
@@ -7992,6 +8001,16 @@
             return null
         }
 
+        /**
+         * Texture received too late. We do not need it.
+         * @param {*} url 
+         * @param {*} texture 
+         */
+        static lateTexture(url, texture) {
+            let destroyBase = !registeredTiles.has(url);
+            texture.destroy(destroyBase);
+        }
+
         static printInfos() {
             let references = new Map();
             let multiples = 0;
@@ -8035,7 +8054,7 @@
             if (this.loaded.has(url)) return false
             if (this.loading.has(url)) return false
 
-            Tile.schedule(url);
+            //Tile.schedule(url)
             this.map.set(url, [col, row]);
             this.loading.add(url);
             this.loadQueue.push(url);
@@ -8045,7 +8064,7 @@
         unschedule(url) {
             if (this.loaded.has(url)) this.loaded.delete(url);
             if (this.loading.has(url)) this.loading.delete(url);
-            Tile.unschedule(url);
+            //Tile.unschedule(url)
             this.loadQueue = this.loadQueue.filter(item => item != url);
         }
 
@@ -8105,7 +8124,7 @@
             if (this.loaded.has(url)) return false
             if (this.loading.has(url)) return false
 
-            Tile.schedule(url);
+            //Tile.schedule(url)
             let reusableTexture = Tile.textureAvailable(url);
             if (reusableTexture) {
                 if (this.debug) console.log('Texture reusable', reusableTexture);
@@ -8166,8 +8185,8 @@
         _onLoaded(loader, resource) {
             if (this.destroyed) {
                 let texture = resource.texture;
-                let destroyBase = !deepZoomTileCache.has(resource.url);
+                let url = resource.url;
-                texture.destroy(destroyBase);
+                Tile.lateTexture(url, texture);
                 console.warn("Received resource after destroy", texture);
                 return
             }
@@ -8628,9 +8647,6 @@
         return n % 2 == 0
     }
 
-    function printTileCacheInfos() {
-        Tile.printInfos();
-    }
     /**
      * A utility class that holds information typically provided by DZI files, i.e.
      * height and width of the overall image, overlap, and image type.
@@ -8985,6 +9001,7 @@
                 : 1;
             this.alpha = alpha;
             this.fastLoads = 0;
+            this.active = true;
             this.autoLoadTiles = autoLoadTiles;
             this.minimumLevel = minimumLevel;
             this.quadTrees = new Map(); // url as keys, TileQuadNodes as values
@@ -9256,9 +9273,9 @@
         }
 
         worldBounds() {
-            let viewBounds = this.app.scene.getBounds();
+            let viewBounds = this.app.scene.bounds || this.app.scene.getBounds(); 
             // Using getBounds extends visible scope after loading tiles and leads
-            // to excessive loading
+            // to excessive loading. So we prefer bounds over getBounds()
             if (this.world != null) {
                 let bounds = this.world.bounds;
                 let x = Math.max(-bounds.width, bounds.x);
@@ -9638,6 +9655,9 @@
          * @param {boolean} debug - log debug infos
          */
         transformed(event) {
+            if (!this.active) {
+                return
+            }
             let key = this.currentLevel.toString();
             let currentTiles = this.tileLayers[key];
             if (typeof currentTiles == 'undefined') {
@@ -9685,6 +9705,7 @@
        * @memberof DeepZoomImage
        */
         activate() {
+            this.active = true;
             this.destroyTilesAboveLevel(this.currentLevel);
             this.ensureTiles(this.currentLevel, null);
             //console.log("Activate Textures!", this.currentLevel)
@@ -9696,35 +9717,19 @@
        * @memberof DeepZoomImage
        */
         deactivate() {
+            this.active = false;
             this.destroyAllTiles();
-            Object.keys(this.tileLayers).forEach(key => {
-                this.destroyTiles(key);
-            });
             this.tileContainer.destroy({ children: true });
-            printTileCacheInfos();
         }
 
         throwFinished() {
-            console.log("throwFinished");
+            //console.log("throwFinished")
             let key = this.currentLevel.toString();
             let currentTiles = this.tileLayers[key];
             if (typeof currentTiles == 'undefined') {
                 return
             }
-
             this.ensureTiles(this.currentLevel);
-            // let all = new Set()
-            // for (let tile of currentTiles.children) {
-            //     all.add(tile.url)
-            // }
-            // let { centerCol, centerRow, needed } = this.neededTiles(currentTiles, this.currentLevel)
-            // for (let [url, col, row] of needed) {
-            //     all.delete(url)
-            // }
-            // for (let url of all) {
-            //     currentTiles.destroyTileByUrl(url)
-            // }
-            // currentTiles.loader.loader.reset()
         }
     }
 

lib/interaction.html

@@ -23,7 +23,7 @@ a single delegate pattern.
 <p>The main differences are that <code>PointerEvent</code> are fired for each
 touch point, whereas the <code>TouchEvent</code> collects multiple
 <code>TouchPoints</code> into a single event. The basic PointMap and Interaction
-classes unify this behavior by collection all contact points regardless
+classes unify this behavior by collecting all contact points regardless
 of their original mouse, touch, or pointer events.</p>
 <h2>
     Point Maps

lib/logging.js

@@ -1,11 +1,17 @@
 let ipc = null
+let logMessages = new Set()
 
 try {
     ipc = require('electron').ipcRenderer
-} catch (e) {}
+} catch (e) {
+    console.log("Cannot use electron logging.")
+}
 
 /** Basic class for app specific logging requirements.
  * Can be used to implement persistent logging in electron apps.
+ * Uses a logMessage cache to prevent error overflows. This is 
+ * needed since errors may occur very frequently
+ * (e.g. display update loops at 60fps, programmatic loops, ...).
  */
 export default class Logging {
 
@@ -20,4 +26,36 @@ export default class Logging {
             console.log(message)
         }
     }
+
+    /**
+     * Static warn function. 
+     * Emits each warning only once per session.
+     * @param {*} message 
+     */
+    static warn(message) {
+        if (!logMessages.has(message)) {
+            logMessages.add(message)
+            if (ipc) {
+                ipc.send('warn', message)
+            } else {
+                console.warn(message)
+            }
+        }
+    }
+
+    /**
+    * Static error function. 
+    * Emits each error message only once per session.
+    * @param {*} message 
+    */
+    static error(message) {
+        if (!logMessages.has(message)) {
+            logMessages.add(message)
+            if (ipc) {
+                ipc.send('error', message)
+            } else {
+                console.error(message)
+            }
+        }
+    }
 }

lib/pixi/deepzoom/image.js

@@ -7,9 +7,6 @@ function isEven(n) {
     return n % 2 == 0
 }
 
-function printTileCacheInfos() {
-    Tile.printInfos()
-}
 /**
  * A utility class that holds information typically provided by DZI files, i.e.
  * height and width of the overall image, overlap, and image type.
@@ -364,6 +361,7 @@ export class DeepZoomImage extends PIXI.Container {
             : 1
         this.alpha = alpha
         this.fastLoads = 0
+        this.active = true
         this.autoLoadTiles = autoLoadTiles
         this.minimumLevel = minimumLevel
         this.quadTrees = new Map() // url as keys, TileQuadNodes as values
@@ -635,9 +633,9 @@ export class DeepZoomImage extends PIXI.Container {
     }
 
     worldBounds() {
-        let viewBounds = this.app.scene.getBounds()
+        let viewBounds = this.app.scene.bounds || this.app.scene.getBounds() 
         // Using getBounds extends visible scope after loading tiles and leads
-        // to excessive loading
+        // to excessive loading. So we prefer bounds over getBounds()
         if (this.world != null) {
             let bounds = this.world.bounds
             let x = Math.max(-bounds.width, bounds.x)
@@ -1017,6 +1015,9 @@ export class DeepZoomImage extends PIXI.Container {
      * @param {boolean} debug - log debug infos
      */
     transformed(event) {
+        if (!this.active) {
+            return
+        }
         let key = this.currentLevel.toString()
         let currentTiles = this.tileLayers[key]
         if (typeof currentTiles == 'undefined') {
@@ -1064,6 +1065,7 @@ export class DeepZoomImage extends PIXI.Container {
    * @memberof DeepZoomImage
    */
     activate() {
+        this.active = true
         this.destroyTilesAboveLevel(this.currentLevel)
         this.ensureTiles(this.currentLevel, null)
         //console.log("Activate Textures!", this.currentLevel)
@@ -1075,34 +1077,18 @@ export class DeepZoomImage extends PIXI.Container {
    * @memberof DeepZoomImage
    */
     deactivate() {
+        this.active = false
         this.destroyAllTiles()
-        Object.keys(this.tileLayers).forEach(key => {
-            this.destroyTiles(key)
-        })
         this.tileContainer.destroy({ children: true })
-        printTileCacheInfos()
     }
 
     throwFinished() {
-        console.log("throwFinished")
+        //console.log("throwFinished")
         let key = this.currentLevel.toString()
         let currentTiles = this.tileLayers[key]
         if (typeof currentTiles == 'undefined') {
             return
         }
-
         this.ensureTiles(this.currentLevel)
-        // let all = new Set()
-        // for (let tile of currentTiles.children) {
-        //     all.add(tile.url)
-        // }
-        // let { centerCol, centerRow, needed } = this.neededTiles(currentTiles, this.currentLevel)
-        // for (let [url, col, row] of needed) {
-        //     all.delete(url)
-        // }
-        // for (let url of all) {
-        //     currentTiles.destroyTileByUrl(url)
-        // }
-        // currentTiles.loader.loader.reset()
     }
 }

lib/pixi/deepzoom/loader.js

@@ -29,7 +29,7 @@ export class TileLoader {
         if (this.loaded.has(url)) return false
         if (this.loading.has(url)) return false
 
-        Tile.schedule(url)
+        //Tile.schedule(url)
         this.map.set(url, [col, row])
         this.loading.add(url)
         this.loadQueue.push(url)
@@ -39,7 +39,7 @@ export class TileLoader {
     unschedule(url) {
         if (this.loaded.has(url)) this.loaded.delete(url)
         if (this.loading.has(url)) this.loading.delete(url)
-        Tile.unschedule(url)
+        //Tile.unschedule(url)
         this.loadQueue = this.loadQueue.filter(item => item != url)
     }
 
@@ -99,7 +99,7 @@ export class PIXITileLoader extends TileLoader {
         if (this.loaded.has(url)) return false
         if (this.loading.has(url)) return false
 
-        Tile.schedule(url)
+        //Tile.schedule(url)
         let reusableTexture = Tile.textureAvailable(url)
         if (reusableTexture) {
             if (this.debug) console.log('Texture reusable', reusableTexture)

lib/pixi/deepzoom/tile.js

@@ -1,9 +1,13 @@
+/* ES Lint  */
+/* globals PIXI, console*/
 
 const registeredTiles = new Map()
-const pendingTiles = new Map()
 /** Implements a baseTexture cache. The last textures are kept for reuse  */
 let keepTextures = 0
 const keptTextures = []
+const lateTextures = new Map()
+let lastSweepTime = 0
+let sweepInterval = 2000.0
 
 /** The current Tile implementation simply uses PIXI.Sprites.
  *
@@ -28,22 +32,6 @@ export default class Tile extends PIXI.Sprite {
         keepTextures = value
     }
 
-    /**
-     * Marks the given url as pending. Pending tiles should not be destroyed
-     *
-     * @static
-     * @param {*} url
-     * @memberof Tile
-     */
-    static schedule(url) {
-        let count = 0
-        if (pendingTiles.has(url)) {
-            count = pendingTiles.get(url)
-        }
-        pendingTiles.set(url, count + 1)
-        // console.log("Tile.scheduled", url, pendingTiles.size)
-    }
-
     /**
      * Returns true iff the url is pending
      *
@@ -52,9 +40,9 @@ export default class Tile extends PIXI.Sprite {
      * @returns
      * @memberof Tile
      */
-    static isPending(url) {
+    /*static isPending(url) {
         return pendingTiles.has(url) && pendingTiles.get(url) > 0
-    }
+    } */
 
     static isObsolete(url) {
         if (registeredTiles.has(url) && registeredTiles.get(url) > 0) {
@@ -63,26 +51,6 @@ export default class Tile extends PIXI.Sprite {
         return true
     }
 
-    /**
-     * Removes the given url from pending urls.
-     *
-     * @static
-     * @param {*} url
-     * @memberof Tile
-     */
-    static unschedule(url) {
-        if (pendingTiles.has(url)) {
-            let count = pendingTiles.get(url)
-            if (count > 1) {
-                pendingTiles.set(url, count - 1)
-            }
-            else {
-                pendingTiles.clear(url)
-            }
-        }
-        // console.log("Tile.unscheduled", url, pendingTiles.size)
-    }
-
     /**
      * Loads a tile from image using the PIXI.Texture.fromImage method.
      *
@@ -105,7 +73,7 @@ export default class Tile extends PIXI.Sprite {
      * @memberof Tile
      */
     register(url, debug = false) {
-        Tile.unschedule(url)
+        //Tile.unschedule(url)
         if (registeredTiles.has(url)) {
             let tiles = registeredTiles.get(url)
             tiles.add(this)
@@ -139,18 +107,18 @@ export default class Tile extends PIXI.Sprite {
      * @param {*} options  Part of the PIXI API, but ignored in the implementation
      * @memberof Tile
      */
-    destroy(options, debug = true) {
+    destroy(options, debug = false) {
         let count = this.unregister()
 
         if (keepTextures > 0) {
-            keptTextures.push({ url: this.url, texture: this.texture})
+            keptTextures.push({ url: this.url, texture: this.texture })
 
             let opts = { children: true, texture: false, baseTexture: false }
             if (debug) console.log("Tile.destroy", registeredTiles.size, opts)
             super.destroy(opts)
 
-            while(keptTextures.length > keepTextures) {
+            while (keptTextures.length > keepTextures) {
-                let {url, texture} = keptTextures.shift() 
+                let { url, texture } = keptTextures.shift()
                 if (Tile.isObsolete(url)) {
                     texture.destroy(true) // Destroy base as well
                     if (debug) console.log("Destroying texture and baseTexture", url)
@@ -159,7 +127,7 @@ export default class Tile extends PIXI.Sprite {
         }
         else {
             // No longer registered and not pending
-            if (count <= 0 && !Tile.isPending(this.url)) {
+            if (count <= 0) { // && !Tile.isPending(this.url)
                 let opts = { children: true, texture: true, baseTexture: true }
                 super.destroy(opts)
                 if (debug) console.log("Tile.destroy", registeredTiles.size, opts)
@@ -195,14 +163,60 @@ export default class Tile extends PIXI.Sprite {
         return null
     }
 
+    /**
+     * Specialized renderWebGL to avoid freezing system
+     *
+     * @param {*} renderer
+     * @memberof Tile
+     */
+    renderWebGL(renderer) {
+        try {
+            super.renderWebGL(renderer)
+        }
+        catch (e) {
+            // We want persistent logging here
+            Logging.error("Error in Tile.renderWebGL: " + e.message)
+        }
+    }
+
+    /**
+     * Removes lately arrived texture if they have not been touched in the meanwhile.
+     *
+     * @static
+     * @memberof Tile
+     */
+    static sweepLateTextures() {
+        let now = performance.now()
+        if (now > lastSweepTime + sweepInterval) {
+            lastSweepTime = now
+            let count = 0
+            for (let [url, texture] of lateTextures.entries()) {
+                if (texture) {
+                    let base = texture.baseTexture
+                    if (base != null && base.touched == 0) {
+                        texture.destroy(true)
+                        //console.info("Sweeping ", url)
+                        count += 1
+                        lateTextures.delete(url)
+                    }
+                }
+            }
+            if (count > 0)
+                console.log("Sweeping textures", count)
+        }
+    }
+
     /**
      * Texture received too late. We do not need it.
      * @param {*} url 
      * @param {*} texture 
      */
     static lateTexture(url, texture) {
-        let destroyBase = !registeredTiles.has(url)
+        lateTextures.set(url, texture)
-        texture.destroy(destroyBase)
+        //console.warn("Tile.lateTexture")
+        // We cannot destroy the texture since we got errors in t.renderWebGL.
+        // Perhaps we can destroy unsed textures later on
+        Tile.sweepLateTextures()
     }
 
     static printInfos() {

lib/pixi/timeline.js

@@ -1,6 +1,6 @@
 import { Cycle, Colors, Dates, isEmpty } from '../utils.js'
 import { Capabilities } from '../capabilities.js'
-import { BitmapLabeledGraphics, LabeledGraphics, FontInfo } from './labeledgraphics.js'
+import { BitmapLabeledGraphics, FontInfo } from './labeledgraphics.js'
 
 
 export class Ticks {
@@ -9,6 +9,10 @@ export class Ticks {
         return ['decade', 'year', 'month', 'day', 'hour', 'minute', 'second']
     }
 
+    static get largeTickSize() {
+        return 4.2
+    }
+
     get minWidth() {
         return 10
     }
@@ -83,7 +87,7 @@ export class Ticks {
         return date.toLocaleDateString('de', format)
     }
 
-    draw(timeline, range, width, height, available, format, nextFormat, level) {
+    draw(timeline, range, width, height, available, format, nextFormat, level, extraTicks=false) {
         let first = null
         let last = null
         let keyedFormat = (format) ? format[this.formatKey] : null
@@ -91,7 +95,6 @@ export class Ticks {
         let redundant = (nextFormat) ? this.formatKey in nextFormat : false
         let fullyRedundant = keyedFormat != null && keyedFormat == keyedNextFormat
         let y = timeline.getY()
-
         for (let { start, end } of this.iterRanges(range)) {
             let x = timeline.toX(start)
             let xx = x
@@ -100,11 +103,10 @@ export class Ticks {
                 let key = this.dateKey(start)
                 let text = this.toLocaleString(start, format)
                 let align = 'center'
-                let downTick = false
                 if (nextFormat) {
                     yy = y + timeline.tickLabelOffset(-1, 1)
                     align = 'left'
-                    timeline.drawTick(x, 4.2)
+                    timeline.drawTick(x, Ticks.largeTickSize)
                     let nextX = timeline.toX(end) - 100
                     if (x < 0 && nextX > -100 && !redundant) {
                         xx = Math.min(4, nextX)
@@ -112,20 +114,18 @@ export class Ticks {
                     else {
                         xx -= 2
                     }
-                    downTick = true
                 }
                 else if (level > 0) {
                     xx = x + available / 2
                 }
-                else {
+               
-                    downTick = true
-                }
                 if (!fullyRedundant) {
                     timeline.ensureLabel(key, text,
                         { x: xx, y: yy, align },
                         FontInfo.small)
                 }
-                if (downTick) timeline.drawTick(x, -1)
+                if (extraTicks)
+                    timeline.drawTick(x, -level)
             }
             if (timeline.visibleRange(start, end)) {
                 if (first == null)
@@ -137,6 +137,15 @@ export class Ticks {
             return null
         return { start: first, end: last }
     }
+
+    drawExtra(timeline, range, size) {
+        for (let { start } of this.iterRanges(range)) {
+            if (timeline.visibleDate(start)) {
+                let x = timeline.toX(start)
+                timeline.drawTick(x, -size)
+            }
+        }
+    }
 }
 
 export class DecadeTicks extends Ticks {
@@ -434,15 +443,34 @@ export class TimeTicks {
             visible.push(ticks)
         }
         let level = 0
+        let ranges = []
         for (let ticks of visible) {
             if (range == null)
-                return
+                continue
             range = ticks.draw(timeline, range, width, height,
                 availables.get(ticks),
                 formats.get(ticks),
                 nextFormats.get(ticks), level)
+            if (range) {
+                ranges.push({ticks, range})
+            }
             level += 1
         }
+
+        let extraLevel = ranges.length - 1
+        let extraStart = extraLevel
+        for(let {ticks, range} of ranges) {
+            ticks.drawExtra(timeline, range, extraLevel)
+            extraLevel -= 1
+            if (extraLevel <= 0) {
+                continue
+            }
+        }
+
+        timeline.drawTick(start, Ticks.largeTickSize)
+        timeline.drawTick(start, -extraStart)
+        timeline.drawTick(end, Ticks.largeTickSize)
+        timeline.drawTick(end, -extraStart)
     }
 }
 

lib/scatter.js

@@ -173,11 +173,16 @@ class Throwable {
         }
     }
 
+    _throwDeltaTime() {
+        let t = performance.now()
+        let dt = t - this.lastframe
+        this.lastframe = t
+        return dt
+    }
+
     animateThrow(time) {
         if (this.velocity != null) {
-            let t = performance.now()
+            let dt = this._throwDeltaTime()
-            let dt = t - this.lastframe
-            this.lastframe = t
             // console.log("animateThrow", dt)
             let next = this.nextVelocity(this.velocity)
             let prevLength = Points.length(this.velocity)
@@ -1434,7 +1439,7 @@ export class DOMScatter extends AbstractScatter {
             let resizeW = r * Math.cos(Angle.degree2radian(phiCorrected))
             let resizeH = -r * Math.sin(Angle.degree2radian(phiCorrected))
 
-            if (this.element.offsetWidth + resizeW / this.scale > this.width * 0.3 && this.element.offsetHeight + resizeH / this.scale > this.height * 0.3) TweenLite.to(this.element, 0, { width: this.element.offsetWidth + resizeW / this.scale, height: this.element.offsetHeight + resizeH / this.scale });
+            if ((this.element.offsetWidth + resizeW) / this.scale > this.width * 0.5 / this.scale && (this.element.offsetHeight + resizeH) / this.scale > this.height * 0.3  / this.scale) TweenLite.to(this.element, 0, { width: this.element.offsetWidth + resizeW / this.scale, height: this.element.offsetHeight + resizeH / this.scale });
 
             this.oldX = e.clientX
             this.oldY = e.clientY

package-lock.json

@@ -1429,6 +1429,16 @@
                 "map-cache": "^0.2.2"
             }
         },
+        "fs-extra": {
+            "version": "8.0.1",
+            "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.0.1.tgz",
+            "integrity": "sha512-W+XLrggcDzlle47X/XnS7FXrXu9sDo+Ze9zpndeBxdgv88FHLm1HtmkhEwavruS6koanBjp098rUpHs65EmG7A==",
+            "requires": {
+                "graceful-fs": "^4.1.2",
+                "jsonfile": "^4.0.0",
+                "universalify": "^0.1.0"
+            }
+        },
         "fs-mkdirp-stream": {
             "version": "1.0.0",
             "resolved": "https://registry.npmjs.org/fs-mkdirp-stream/-/fs-mkdirp-stream-1.0.0.tgz",
@@ -1464,8 +1474,7 @@
                 "ansi-regex": {
                     "version": "2.1.1",
                     "bundled": true,
-                    "dev": true,
+                    "dev": true
-                    "optional": true
                 },
                 "aproba": {
                     "version": "1.2.0",
@@ -1486,14 +1495,12 @@
                 "balanced-match": {
                     "version": "1.0.0",
                     "bundled": true,
-                    "dev": true,
+                    "dev": true
-                    "optional": true
                 },
                 "brace-expansion": {
                     "version": "1.1.11",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "balanced-match": "^1.0.0",
                         "concat-map": "0.0.1"
@@ -1508,20 +1515,17 @@
                 "code-point-at": {
                     "version": "1.1.0",
                     "bundled": true,
-                    "dev": true,
+                    "dev": true
-                    "optional": true
                 },
                 "concat-map": {
                     "version": "0.0.1",
                     "bundled": true,
-                    "dev": true,
+                    "dev": true
-                    "optional": true
                 },
                 "console-control-strings": {
                     "version": "1.1.0",
                     "bundled": true,
-                    "dev": true,
+                    "dev": true
-                    "optional": true
                 },
                 "core-util-is": {
                     "version": "1.0.2",
@@ -1638,8 +1642,7 @@
                 "inherits": {
                     "version": "2.0.3",
                     "bundled": true,
-                    "dev": true,
+                    "dev": true
-                    "optional": true
                 },
                 "ini": {
                     "version": "1.3.5",
@@ -1651,7 +1654,6 @@
                     "version": "1.0.0",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "number-is-nan": "^1.0.0"
                     }
@@ -1666,7 +1668,6 @@
                     "version": "3.0.4",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "brace-expansion": "^1.1.7"
                     }
@@ -1674,14 +1675,12 @@
                 "minimist": {
                     "version": "0.0.8",
                     "bundled": true,
-                    "dev": true,
+                    "dev": true
-                    "optional": true
                 },
                 "minipass": {
                     "version": "2.3.5",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "safe-buffer": "^5.1.2",
                         "yallist": "^3.0.0"
@@ -1700,7 +1699,6 @@
                     "version": "0.5.1",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "minimist": "0.0.8"
                     }
@@ -1781,8 +1779,7 @@
                 "number-is-nan": {
                     "version": "1.0.1",
                     "bundled": true,
-                    "dev": true,
+                    "dev": true
-                    "optional": true
                 },
                 "object-assign": {
                     "version": "4.1.1",
@@ -1794,7 +1791,6 @@
                     "version": "1.4.0",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "wrappy": "1"
                     }
@@ -1880,8 +1876,7 @@
                 "safe-buffer": {
                     "version": "5.1.2",
                     "bundled": true,
-                    "dev": true,
+                    "dev": true
-                    "optional": true
                 },
                 "safer-buffer": {
                     "version": "2.1.2",
@@ -1917,7 +1912,6 @@
                     "version": "1.0.2",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "code-point-at": "^1.0.0",
                         "is-fullwidth-code-point": "^1.0.0",
@@ -1937,7 +1931,6 @@
                     "version": "3.0.1",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "ansi-regex": "^2.0.0"
                     }
@@ -1981,14 +1974,12 @@
                 "wrappy": {
                     "version": "1.0.2",
                     "bundled": true,
-                    "dev": true,
+                    "dev": true
-                    "optional": true
                 },
                 "yallist": {
                     "version": "3.0.3",
                     "bundled": true,
-                    "dev": true,
+                    "dev": true
-                    "optional": true
                 }
             }
         },
@@ -4432,6 +4423,11 @@
                 "through2-filter": "^3.0.0"
             }
         },
+        "universalify": {
+            "version": "0.1.2",
+            "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
+            "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg=="
+        },
         "unset-value": {
             "version": "1.0.0",
             "resolved": "https://registry.npmjs.org/unset-value/-/unset-value-1.0.0.tgz",

package.json

@@ -1,6 +1,6 @@
 {
     "name": "iwmlib",
-    "version": "1.0.10",
+    "version": "1.0.14",
     "description": "An Open Source library for multi-touch, WebGL powered applications.",
     "main": "index.js",
     "directories": {
@@ -28,6 +28,7 @@
         "gulp-uglify": "^3.0.2"
     },
     "dependencies": {
+        "fs-extra": "^8.0.1",
         "gsap": "^2.1.3",
         "hammerjs": "^2.0.8",
         "optimal-select": "^4.0.1",