Merge #176: Fix TxViewDelegate layout

af58f5b qt: Stop the effect of hidden widgets on the size of QStackedWidget (Hennadii Stepanov)
f0d0479 qt: Fix TxViewDelegate layout (Hennadii Stepanov)
d439921 qt: Add TransactionOverviewWidget class (Hennadii Stepanov)

Pull request description:

  This change:
  - prevents overlapping date and amount strings
  - guaranties that "eye" sign at the end of the watch-only address/label is always visible

  Fix bitcoin/bitcoin#20826

  Here are some screenshots with this PR with the _minimum available width_ of the transaction list widget:

  ![Screenshot from 2021-01-03 20-23-56](https://user-images.githubusercontent.com/32963518/103486411-6408ca00-4e06-11eb-9c21-627a65e532c1.png)
  ![Screenshot from 2021-01-03 20-24-47](https://user-images.githubusercontent.com/32963518/103486413-6834e780-4e06-11eb-8221-478d98bbdf69.png)
  ![Screenshot from 2021-01-03 20-25-27](https://user-images.githubusercontent.com/32963518/103486418-6d923200-4e06-11eb-8625-a4ed3089b6ab.png)
  ![Screenshot from 2021-01-03 20-33-20](https://user-images.githubusercontent.com/32963518/103486420-708d2280-4e06-11eb-90c2-f2463fb3c4b3.png)

ACKs for top commit:
  dooglus:
    ACK af58f5b.
  jarolrod:
    re-ACK af58f5b

Tree-SHA512: 6dae682490ec50fa0335d220bc2d153fa3e6ed578f07c6353a3b180f8f6cf1c2f9e52ebd7b3076f51d7004d86bf5cca14e6b5db9cdf786e85a57a81eacbb4988

src/Makefile.qt.include

@@ -78,6 +78,7 @@ QT_MOC_CPP = \
   qt/moc_transactiondesc.cpp \
   qt/moc_transactiondescdialog.cpp \
   qt/moc_transactionfilterproxy.cpp \
+  qt/moc_transactionoverviewwidget.cpp \
   qt/moc_transactiontablemodel.cpp \
   qt/moc_transactionview.cpp \
   qt/moc_utilitydialog.cpp \
@@ -151,6 +152,7 @@ BITCOIN_QT_H = \
   qt/transactiondesc.h \
   qt/transactiondescdialog.h \
   qt/transactionfilterproxy.h \
+  qt/transactionoverviewwidget.h \
   qt/transactionrecord.h \
   qt/transactiontablemodel.h \
   qt/transactionview.h \

src/qt/forms/overviewpage.ui

@@ -504,7 +504,7 @@
            </layout>
           </item>
           <item>
-           <widget class="QListView" name="listTransactions">
+           <widget class="TransactionOverviewWidget" name="listTransactions">
             <property name="styleSheet">
              <string notr="true">QListView { background: transparent; }</string>
             </property>
@@ -517,9 +517,15 @@
             <property name="horizontalScrollBarPolicy">
              <enum>Qt::ScrollBarAlwaysOff</enum>
             </property>
+            <property name="sizeAdjustPolicy">
+             <enum>QAbstractScrollArea::AdjustToContents</enum>
+            </property>
             <property name="selectionMode">
              <enum>QAbstractItemView::NoSelection</enum>
             </property>
+            <property name="uniformItemSizes">
+             <bool>true</bool>
+            </property>
            </widget>
           </item>
          </layout>
@@ -544,6 +550,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>TransactionOverviewWidget</class>
+   <extends>QListView</extends>
+   <header>qt/transactionoverviewwidget.h</header>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections/>
 </ui>

src/qt/overviewpage.cpp

@@ -12,6 +12,7 @@
 #include <qt/optionsmodel.h>
 #include <qt/platformstyle.h>
 #include <qt/transactionfilterproxy.h>
+#include <qt/transactionoverviewwidget.h>
 #include <qt/transactiontablemodel.h>
 #include <qt/walletmodel.h>
 
@@ -21,6 +22,9 @@
 #include <QPainter>
 #include <QStatusTipEvent>
 
+#include <algorithm>
+#include <map>
+
 #define DECORATION_SIZE 54
 #define NUM_ITEMS 5
 
@@ -34,7 +38,7 @@ class TxViewDelegate : public QAbstractItemDelegate
         QAbstractItemDelegate(parent), unit(BitcoinUnits::BTC),
         platformStyle(_platformStyle)
     {
-
+        connect(this, &TxViewDelegate::width_changed, this, &TxViewDelegate::sizeHintChanged);
     }
 
     inline void paint(QPainter *painter, const QStyleOptionViewItem &option,
@@ -67,13 +71,15 @@ class TxViewDelegate : public QAbstractItemDelegate
 
         painter->setPen(foreground);
         QRect boundingRect;
-        painter->drawText(addressRect, Qt::AlignLeft|Qt::AlignVCenter, address, &boundingRect);
+        painter->drawText(addressRect, Qt::AlignLeft | Qt::AlignVCenter, address, &boundingRect);
+        int address_rect_min_width = boundingRect.width();
 
         if (index.data(TransactionTableModel::WatchonlyRole).toBool())
         {
             QIcon iconWatchonly = qvariant_cast<QIcon>(index.data(TransactionTableModel::WatchonlyDecorationRole));
             QRect watchonlyRect(boundingRect.right() + 5, mainRect.top()+ypad+halfheight, 16, halfheight);
             iconWatchonly.paint(painter, watchonlyRect);
+            address_rect_min_width += 5 + watchonlyRect.width();
         }
 
         if(amount < 0)
@@ -94,23 +100,42 @@ class TxViewDelegate : public QAbstractItemDelegate
         {
             amountText = QString("[") + amountText + QString("]");
         }
-        painter->drawText(amountRect, Qt::AlignRight|Qt::AlignVCenter, amountText);
+
+        QRect amount_bounding_rect;
+        painter->drawText(amountRect, Qt::AlignRight | Qt::AlignVCenter, amountText, &amount_bounding_rect);
 
         painter->setPen(option.palette.color(QPalette::Text));
-        painter->drawText(amountRect, Qt::AlignLeft|Qt::AlignVCenter, GUIUtil::dateTimeStr(date));
+        QRect date_bounding_rect;
+        painter->drawText(amountRect, Qt::AlignLeft | Qt::AlignVCenter, GUIUtil::dateTimeStr(date), &date_bounding_rect);
+
+        const int minimum_width = std::max(address_rect_min_width, amount_bounding_rect.width() + date_bounding_rect.width());
+        const auto search = m_minimum_width.find(index.row());
+        if (search == m_minimum_width.end() || search->second != minimum_width) {
+            m_minimum_width[index.row()] = minimum_width;
+            Q_EMIT width_changed(index);
+        }
 
         painter->restore();
     }
 
     inline QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override
     {
-        return QSize(DECORATION_SIZE, DECORATION_SIZE);
+        const auto search = m_minimum_width.find(index.row());
+        const int minimum_text_width = search == m_minimum_width.end() ? 0 : search->second;
+        return {DECORATION_SIZE + 8 + minimum_text_width, DECORATION_SIZE};
     }
 
     int unit;
-    const PlatformStyle *platformStyle;
 
+Q_SIGNALS:
+    //! An intermediate signal for emitting from the `paint() const` member function.
+    void width_changed(const QModelIndex& index) const;
+
+private:
+    const PlatformStyle* platformStyle;
+    mutable std::map<int, int> m_minimum_width;
 };
+
 #include <qt/overviewpage.moc>
 
 OverviewPage::OverviewPage(const PlatformStyle *platformStyle, QWidget *parent) :
@@ -136,7 +161,7 @@ OverviewPage::OverviewPage(const PlatformStyle *platformStyle, QWidget *parent)
     ui->listTransactions->setMinimumHeight(NUM_ITEMS * (DECORATION_SIZE + 2));
     ui->listTransactions->setAttribute(Qt::WA_MacShowFocusRect, false);
 
-    connect(ui->listTransactions, &QListView::clicked, this, &OverviewPage::handleTransactionClicked);
+    connect(ui->listTransactions, &TransactionOverviewWidget::clicked, this, &OverviewPage::handleTransactionClicked);
 
     // start with displaying the "out of sync" warnings
     showOutOfSyncWarning(true);

src/qt/transactionoverviewwidget.h

@@ -0,0 +1,41 @@
+// Copyright (c) 2021 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_QT_TRANSACTIONOVERVIEWWIDGET_H
+#define BITCOIN_QT_TRANSACTIONOVERVIEWWIDGET_H
+
+#include <qt/transactiontablemodel.h>
+
+#include <QListView>
+#include <QSize>
+#include <QSizePolicy>
+
+QT_BEGIN_NAMESPACE
+class QShowEvent;
+class QWidget;
+QT_END_NAMESPACE
+
+class TransactionOverviewWidget : public QListView
+{
+    Q_OBJECT
+
+public:
+    explicit TransactionOverviewWidget(QWidget* parent = nullptr) : QListView(parent) {}
+
+    QSize sizeHint() const override
+    {
+        return {sizeHintForColumn(TransactionTableModel::ToAddress), QListView::sizeHint().height()};
+    }
+
+protected:
+    void showEvent(QShowEvent* event) override
+    {
+        Q_UNUSED(event);
+        QSizePolicy sp = sizePolicy();
+        sp.setHorizontalPolicy(QSizePolicy::Minimum);
+        setSizePolicy(sp);
+    }
+};
+
+#endif // BITCOIN_QT_TRANSACTIONOVERVIEWWIDGET_H

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();
 }