From a4c32288849731d8b252a2bfff187419c2d6f4b9 Mon Sep 17 00:00:00 2001
From: ivmartel <ivmartel@gmail.com>
Date: Thu, 4 Mar 2021 00:04:09 +0100
Subject: [PATCH] Better tool availibility filtering according to data. Fixes
 #230.

---
 src/app/dwv/dwv.component.ts | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/src/app/dwv/dwv.component.ts b/src/app/dwv/dwv.component.ts
index 753399ab..be96a3d2 100644
--- a/src/app/dwv/dwv.component.ts
+++ b/src/app/dwv/dwv.component.ts
@@ -35,6 +35,7 @@ export class DwvComponent implements OnInit {
           events: ['drawcreate', 'drawchange', 'drawmove', 'drawdelete']
       }
   };
+  public toolNames: string[];
   public selectedTool = 'Select Tool';
   public loadProgress = 0;
   public dataLoaded = false;
@@ -81,13 +82,16 @@ export class DwvComponent implements OnInit {
     this.dwvApp.addEventListener('load', (/*event*/) => {
       // set dicom tags
       this.metaData = dwv.utils.objectToArray(this.dwvApp.getMetaData());
-      // set the selected tool
-      let selectedTool = 'Scroll';
-      if (this.dwvApp.isMonoSliceData() &&
-        this.dwvApp.getImage().getNumberOfFrames() === 1) {
-        selectedTool = 'ZoomAndPan';
+      // available tools
+      this.toolNames = [];
+      for (const key in this.tools) {
+        if ((key === 'Scroll' && this.dwvApp.canScroll()) ||
+          (key === 'WindowLevel' && this.dwvApp.canWindowLevel()) ||
+          (key !== 'Scroll' && key !== 'WindowLevel')) {
+          this.toolNames.push(key);
+        }
       }
-      this.onChangeTool(selectedTool);
+      this.onChangeTool(this.toolNames[0]);
       // set data loaded flag
       this.dataLoaded = true;
     });
@@ -131,13 +135,6 @@ export class DwvComponent implements OnInit {
     dwv.utils.loadFromUri(window.location.href, this.dwvApp);
   }
 
-  /**
-   * Get the tool names as a string array.
-   */
-  get toolNames(): string[] {
-      return Object.keys(this.tools);
-  }
-
   /**
    * Handle a change tool event.
    * @param tool The new tool name.