From 9ff94422269f01ba9fc2752bb549ee148325c3e4 Mon Sep 17 00:00:00 2001
From: Artur Wieczorek <artwik@wp.pl>
Date: Sun, 20 Jan 2019 13:07:48 +0100
Subject: [PATCH] Update column width in wxHeaderCtrlSimple while resizing the
 column

In EVT_HEADER_RESIZING event handler there is necessary to update actual
column width and redraw the control to show the column with new width.

Closes #18331.
---
 include/wx/headerctrl.h      |  3 +++
 src/common/headerctrlcmn.cpp | 10 ++++++++++
 2 files changed, 13 insertions(+)

diff --git a/include/wx/headerctrl.h b/include/wx/headerctrl.h
index f491fcbc7a..f2270bf78e 100644
--- a/include/wx/headerctrl.h
+++ b/include/wx/headerctrl.h
@@ -345,6 +345,8 @@ protected:
         return -1;
     }
 
+    void OnHeaderResizing(wxHeaderCtrlEvent& evt);
+
 private:
     // functions implementing our public API
     void DoInsert(const wxHeaderColumnSimple& col, unsigned int idx);
@@ -371,6 +373,7 @@ private:
 
 
     wxDECLARE_NO_COPY_CLASS(wxHeaderCtrlSimple);
+    wxDECLARE_EVENT_TABLE();
 };
 
 // ----------------------------------------------------------------------------
diff --git a/src/common/headerctrlcmn.cpp b/src/common/headerctrlcmn.cpp
index 54bb90119e..2f5eeff7a7 100644
--- a/src/common/headerctrlcmn.cpp
+++ b/src/common/headerctrlcmn.cpp
@@ -386,6 +386,10 @@ bool wxHeaderCtrlBase::ShowCustomizeDialog()
 // wxHeaderCtrlSimple implementation
 // ============================================================================
 
+wxBEGIN_EVENT_TABLE(wxHeaderCtrlSimple, wxHeaderCtrl)
+    EVT_HEADER_RESIZING(wxID_ANY, wxHeaderCtrlSimple::OnHeaderResizing)
+wxEND_EVENT_TABLE()
+
 void wxHeaderCtrlSimple::Init()
 {
     m_sortKey = wxNO_COLUMN;
@@ -466,6 +470,12 @@ wxHeaderCtrlSimple::UpdateColumnWidthToFit(unsigned int idx, int widthTitle)
     return true;
 }
 
+void wxHeaderCtrlSimple::OnHeaderResizing(wxHeaderCtrlEvent& evt)
+{
+    m_cols[evt.GetColumn()].SetWidth(evt.GetWidth());
+    Refresh();
+}
+
 // ============================================================================
 // wxHeaderCtrlEvent implementation
 // ============================================================================