Merge #18894: gui: Fix manual coin control with multiple wallets loaded

a8b5f1b133 gui: Fix manual coin control with multiple wallets loaded (João Barbosa)

Pull request description:

  This PR ensures each loaded wallet has a dedicated coin control in the send view which is manipulated by the coin control dialog.

  This is an alternative to #17457. Two main differences are:
   - scope reduced - no unnecessary changes unrelated to the fix;
   - approach taken - coin control instance now belongs to the send view.

  All problems raised in #17457 reviews no longer apply due to the approach taken - https://github.com/bitcoin/bitcoin/pull/17457#pullrequestreview-319297589 and https://github.com/bitcoin/bitcoin/pull/17457#issuecomment-555920829)

  No change in behavior if only one wallet is loaded.

  Closes #15725.

ACKs for top commit:
  jonasschnelli:
    utACK a8b5f1b133
  ryanofsky:
    Code review ACK a8b5f1b133. Code changes are very straightforward, just replacing global CCoinControl object with SendCoinsDialog member. Not sure if this means coin control settings are reset between payments. It would be good to note in the PR description or release notes if single wallet behavior is affected
  hebasto:
    ACK a8b5f1b133
  Sjors:
    tACK a8b5f1b133

Tree-SHA512: 3ad9c51bab6f28ec0e90efbd6f43fa510c81dafb2eff0b8c3724efcee3e030054a10be013e27cefe35763374c5f6d7af8c02658736964f733d7e38b646b5df65

src/qt/coincontroldialog.cpp

@@ -41,10 +41,11 @@ bool CCoinControlWidgetItem::operator<(const QTreeWidgetItem &other) const {
     return QTreeWidgetItem::operator<(other);
 }
 
-CoinControlDialog::CoinControlDialog(const PlatformStyle *_platformStyle, QWidget *parent) :
+CoinControlDialog::CoinControlDialog(CCoinControl& coin_control, WalletModel* _model, const PlatformStyle *_platformStyle, QWidget *parent) :
     QDialog(parent),
     ui(new Ui::CoinControlDialog),
-    model(nullptr),
+    m_coin_control(coin_control),
+    model(_model),
     platformStyle(_platformStyle)
 {
     ui->setupUi(this);
@@ -136,6 +137,13 @@ CoinControlDialog::CoinControlDialog(const PlatformStyle *_platformStyle, QWidge
         sortView(settings.value("nCoinControlSortColumn").toInt(), (static_cast<Qt::SortOrder>(settings.value("nCoinControlSortOrder").toInt())));
 
     GUIUtil::handleCloseWindowShortcut(this);
+
+    if(_model->getOptionsModel() && _model->getAddressTableModel())
+    {
+        updateView();
+        updateLabelLocked();
+        CoinControlDialog::updateLabels(m_coin_control, _model, this);
+    }
 }
 
 CoinControlDialog::~CoinControlDialog()
@@ -148,18 +156,6 @@ CoinControlDialog::~CoinControlDialog()
     delete ui;
 }
 
-void CoinControlDialog::setModel(WalletModel *_model)
-{
-    this->model = _model;
-
-    if(_model && _model->getOptionsModel() && _model->getAddressTableModel())
-    {
-        updateView();
-        updateLabelLocked();
-        CoinControlDialog::updateLabels(_model, this);
-    }
-}
-
 // ok button
 void CoinControlDialog::buttonBoxClicked(QAbstractButton* button)
 {
@@ -185,8 +181,8 @@ void CoinControlDialog::buttonSelectAllClicked()
                 ui->treeWidget->topLevelItem(i)->setCheckState(COLUMN_CHECKBOX, state);
     ui->treeWidget->setEnabled(true);
     if (state == Qt::Unchecked)
-        coinControl()->UnSelectAll(); // just to be sure
-    CoinControlDialog::updateLabels(model, this);
+        m_coin_control.UnSelectAll(); // just to be sure
+    CoinControlDialog::updateLabels(m_coin_control, model, this);
 }
 
 // context menu
@@ -371,15 +367,15 @@ void CoinControlDialog::viewItemChanged(QTreeWidgetItem* item, int column)
         COutPoint outpt(uint256S(item->data(COLUMN_ADDRESS, TxHashRole).toString().toStdString()), item->data(COLUMN_ADDRESS, VOutRole).toUInt());
 
         if (item->checkState(COLUMN_CHECKBOX) == Qt::Unchecked)
-            coinControl()->UnSelect(outpt);
+            m_coin_control.UnSelect(outpt);
         else if (item->isDisabled()) // locked (this happens if "check all" through parent node)
             item->setCheckState(COLUMN_CHECKBOX, Qt::Unchecked);
         else
-            coinControl()->Select(outpt);
+            m_coin_control.Select(outpt);
 
         // selection changed -> update labels
         if (ui->treeWidget->isEnabled()) // do not update on every click for (un)select all
-            CoinControlDialog::updateLabels(model, this);
+            CoinControlDialog::updateLabels(m_coin_control, model, this);
     }
 }
 
@@ -396,7 +392,7 @@ void CoinControlDialog::updateLabelLocked()
     else ui->labelLocked->setVisible(false);
 }
 
-void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
+void CoinControlDialog::updateLabels(CCoinControl& m_coin_control, WalletModel *model, QDialog* dialog)
 {
     if (!model)
         return;
@@ -428,7 +424,7 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
     bool fWitness               = false;
 
     std::vector<COutPoint> vCoinControl;
-    coinControl()->ListSelected(vCoinControl);
+    m_coin_control.ListSelected(vCoinControl);
 
     size_t i = 0;
     for (const auto& out : model->wallet().getCoins(vCoinControl)) {
@@ -439,7 +435,7 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
         const COutPoint& outpt = vCoinControl[i++];
         if (out.is_spent)
         {
-            coinControl()->UnSelect(outpt);
+            m_coin_control.UnSelect(outpt);
             continue;
         }
 
@@ -492,7 +488,7 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
                 nBytes -= 34;
 
         // Fee
-        nPayFee = model->wallet().getMinimumFee(nBytes, *coinControl(), nullptr /* returned_target */, nullptr /* reason */);
+        nPayFee = model->wallet().getMinimumFee(nBytes, m_coin_control, nullptr /* returned_target */, nullptr /* reason */);
 
         if (nPayAmount > 0)
         {
@@ -584,12 +580,6 @@ void CoinControlDialog::updateLabels(WalletModel *model, QDialog* dialog)
         label->setVisible(nChange < 0);
 }
 
-CCoinControl* CoinControlDialog::coinControl()
-{
-    static CCoinControl coin_control;
-    return &coin_control;
-}
-
 void CoinControlDialog::updateView()
 {
     if (!model || !model->getOptionsModel() || !model->getAddressTableModel())
@@ -689,13 +679,13 @@ void CoinControlDialog::updateView()
              // disable locked coins
             if (model->wallet().isLockedCoin(output))
             {
-                coinControl()->UnSelect(output); // just to be sure
+                m_coin_control.UnSelect(output); // just to be sure
                 itemOutput->setDisabled(true);
                 itemOutput->setIcon(COLUMN_CHECKBOX, platformStyle->SingleColorIcon(":/icons/lock_closed"));
             }
 
             // set checkbox
-            if (coinControl()->IsSelected(output))
+            if (m_coin_control.IsSelected(output))
                 itemOutput->setCheckState(COLUMN_CHECKBOX, Qt::Checked);
         }