From 28e843ac34793ddbd5229905b64a14c103e3b7ed Mon Sep 17 00:00:00 2001
From: Robert Goldmann <deadlocker@gmx.de>
Date: Sun, 18 Jul 2021 14:10:45 +0200
Subject: [PATCH] #585 - disable show chart button if no chart is selected

---
 src/main/resources/static/js/charts.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/main/resources/static/js/charts.js b/src/main/resources/static/js/charts.js
index 50c563859..6b243fb2c 100644
--- a/src/main/resources/static/js/charts.js
+++ b/src/main/resources/static/js/charts.js
@@ -108,6 +108,7 @@ $(document).ready(function()
 
         this.querySelector('.chart-preview').classList.toggle('active', true);
         document.getElementsByName('chartID')[0].value = this.dataset.id;
+        checkShowChartButton();
     });
 
     filterChartPreviews();
@@ -290,4 +291,15 @@ function unsetActiveChartPreview()
     {
         allChartPreviews[i].classList.toggle('active', false);
     }
+
+    document.getElementsByName('chartID')[0].value = '';
+    checkShowChartButton();
+}
+
+function checkShowChartButton()
+{
+    let buttonShowChart = document.getElementsByName('buttonSave')[0];
+
+    let selectedChartID = document.getElementsByName('chartID')[0].value;
+    buttonShowChart.disabled = selectedChartID === '';
 }
-- 
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