Separated icon from key

editor/js/display.js

@@ -49,7 +49,7 @@ class Display {
             tool.getName() +
             '"><img src="' +
             TOOL_ICON_SRC +
-            tool.getKey() +
+            tool.getIcon() +
             TOOL_ICON_FORMAT +
             '"></button>'
         );

editor/js/tools/collecttool.js

 class CollectTool extends Tool {
     constructor(key) {
-        super("Collect", key);
+        super("Collect", "collect", key);
     }
 
     onNodeClick(node) {

editor/js/tools/deletetool.js

 class DeleteTool extends Tool {
     constructor(key) {
-        super("Delete", key);
+        super("Delete", "delete", key);
     }
 
     onNodeClick(node) {

editor/js/tools/selecttool.js

 class SelectTool extends Tool {
     constructor(key) {
-        super("Select", key);
+        super("Select", "select", key);
     }
 
     onNodeClick(node) {

editor/js/tools/tool.js

 class Tool {
-    constructor(name, key) {
+    constructor(name, icon, key) {
         this.name = name;
+        this.icon = icon;
         this.key = key;
         this.warnings = false;
     }
@@ -13,6 +14,10 @@ class Tool {
         return this.key;
     }
 
+    getIcon() {
+        return this.icon;
+    }
+
     onNodeClick(node) {
         if (this.warnings) {
             console.warn('Method "onNodeClick" not implemented.');