From bdc64c9030488e7a6b88f369fb876c0b21c04a25 Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Tue, 5 Jan 2021 22:33:28 +0200
Subject: [PATCH] qt: Stop the effect of hidden widgets on the size of
 QStackedWidget

Layouts of the hidden widgets, those are children of QStackedWidget,
could prevent to adjust the size of the parent widget in the
WalletFrame widget.

Github-Pull: bitcoin-core/gui#176
Rebased-From: af58f5b12cea91467692dd4ae71d8cc916a608ed
---
 src/qt/walletframe.cpp | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/qt/walletframe.cpp b/src/qt/walletframe.cpp
index 4a9b4a5c8..eaa18b03a 100644
--- a/src/qt/walletframe.cpp
+++ b/src/qt/walletframe.cpp
@@ -106,9 +106,24 @@ void WalletFrame::setCurrentWallet(WalletModel* wallet_model)
 {
     if (mapWalletViews.count(wallet_model) == 0) return;
 
+    // Stop the effect of hidden widgets on the size hint of the shown one in QStackedWidget.
+    WalletView* view_about_to_hide = currentWalletView();
+    if (view_about_to_hide) {
+        QSizePolicy sp = view_about_to_hide->sizePolicy();
+        sp.setHorizontalPolicy(QSizePolicy::Ignored);
+        view_about_to_hide->setSizePolicy(sp);
+    }
+
     WalletView *walletView = mapWalletViews.value(wallet_model);
-    walletStack->setCurrentWidget(walletView);
     assert(walletView);
+
+    // Set or restore the default QSizePolicy which could be set to QSizePolicy::Ignored previously.
+    QSizePolicy sp = walletView->sizePolicy();
+    sp.setHorizontalPolicy(QSizePolicy::Preferred);
+    walletView->setSizePolicy(sp);
+    walletView->updateGeometry();
+
+    walletStack->setCurrentWidget(walletView);
     walletView->updateEncryptionStatus();
 }