From 68a78059c0ffc485776e5698263acb80861336c5 Mon Sep 17 00:00:00 2001
From: Denis Rouzaud <denis.rouzaud@gmail.com>
Date: Tue, 17 Sep 2019 11:57:48 +0200
Subject: [PATCH] fix adding/removing classes in graduated renderer widget
 (#31824)

---
 resources/data/world_map.gpkg                 | Bin 12689408 -> 12689408 bytes
 .../qgsgraduatedsymbolrendererwidget.cpp      |   4 ++++
 2 files changed, 4 insertions(+)

diff --git a/resources/data/world_map.gpkg b/resources/data/world_map.gpkg
index cdd05b64c731206b59e9a2772ddc2c4e312b7421..1014dcf8046e5e9eb317b33c4bc797c74da35885 100644
GIT binary patch
delta 600
zcmWO2XIl*b0D#fwh9p9EimW1gk3x~13K>~>?aV^C$heg^WR*QqnJKGMMppeZeK>#M
zggPt2L*1%k1HtOJ^gyr_2}qdqke<>@!lk!FNFRxmzS2*kq`wT1ff6l)WUvg8p)yQ{
z%Ls{)krFF$GD=2Eyo`~tGET<J1WAxYnJAMaNhZq_nJUv{y3CN7GD~L59GNTgWWFqr
zg|bMJB}Ep?5?Ly#k|xV!xunYqSt+YzwXBh~vQ9E&y<|$3WXlHGD4QflHp>>-D%&Ji
zw#yFLDZ6C1<jEfC{@E-0WWOAcgK|g?OTHYDqjF4+%LzFt1yU%d<g}cTA}N-$5|ndt
zUM@(9T$D?4S*}P(N~KK7<*FzZa!szw4XKoya!YQ@9l0x2QZ4u7zC4hJ@<<-b6L~7n
z<hj(y3#pYlsh5}XN?ywwc`NUvLEcNFG|30~D4*oBe352pkyiOCZPG5^<h%TkpVA?}
R<hT5hzw%Ey+v%#W`wvpC{yG2v

delta 600
zcmWO2XIl*b0D#fwhLF9b$SSh3Gor{&g^aAccIGWq$heg^B$Pc;nJFtJl2!jqAI={*
zq0aK~P`9e6K(IPGH4rR80um-Yq^I<faOo|5q_0FsKj|+6WS|U^!7@aK$}kx&BV?qE
zlF<?=V<bwVWvq;o7#S}UWTH%x$r3AZGDW6JyiAknGDBv{EJ={rGDqghJee;GWT7O=
zB3Ud;WT_;{GFdLkk|HZ)rKHL#SuJa1t*n#vvO&^hqohlQWXdMlEL$W?w#qiyE;}S!
zcFHc<Eqi3I<j6kh{@E`F<e(gq!*WE9O0FD}<8ney$|*T5LCKSRIU{G~oD@i*6v=tH
zAQz=rF3DxNB3C6OB~mJ7a!r(Sxh^;4rc}r+sg&DtNA60MRLecNFAwCQJd(%qM4rks
zc`h~bLTaT>>gA=plGpM^-pV^^koVFkP4YoL$|w0OU!+;SN{h70H))ga@<ZC?r*z0K
R`7M9sul$qFHoEHT{sS%s{we?f

diff --git a/src/gui/symbology/qgsgraduatedsymbolrendererwidget.cpp b/src/gui/symbology/qgsgraduatedsymbolrendererwidget.cpp
index 5d9d71f7850..b02ddfbb1e4 100644
--- a/src/gui/symbology/qgsgraduatedsymbolrendererwidget.cpp
+++ b/src/gui/symbology/qgsgraduatedsymbolrendererwidget.cpp
@@ -1134,6 +1134,8 @@ void QgsGraduatedSymbolRendererWidget::addClass()
 {
   mModel->addClass( mGraduatedSymbol.get() );
   mHistogramWidget->refresh();
+  emit widgetChanged();
+
 }
 
 void QgsGraduatedSymbolRendererWidget::deleteClasses()
@@ -1141,12 +1143,14 @@ void QgsGraduatedSymbolRendererWidget::deleteClasses()
   QList<int> classIndexes = selectedClasses();
   mModel->deleteRows( classIndexes );
   mHistogramWidget->refresh();
+  emit widgetChanged();
 }
 
 void QgsGraduatedSymbolRendererWidget::deleteAllClasses()
 {
   mModel->removeAllRows();
   mHistogramWidget->refresh();
+  emit widgetChanged();
 }
 
 bool QgsGraduatedSymbolRendererWidget::rowsOrdered()