GUI: Disable "Subtract fee from amount" checkbox when a non-pegged asset is selected

luke-jr · instagibbs · commit 36ebb131dc30 · 2019-04-10T10:09:14.000-04:00
Fixes: greenaddress#4
diff --git a/src/qt/sendcoinsentry.cpp b/src/qt/sendcoinsentry.cpp
@@ -44,6 +44,7 @@ SendCoinsEntry::SendCoinsEntry(const PlatformStyle *_platformStyle, QWidget *par
     // Connect signals
     connect(ui->payAmount, &BitcoinAmountField::valueChanged, this, &SendCoinsEntry::payAmountChanged);
     connect(ui->checkboxSubtractFeeFromAmount, &QCheckBox::toggled, this, &SendCoinsEntry::subtractFeeFromAmountChanged);
+    connect(ui->payAmount, SIGNAL(valueChanged()), this, SLOT(payAmountChangedInternal()));
     connect(ui->deleteButton, &QPushButton::clicked, this, &SendCoinsEntry::deleteClicked);
     connect(ui->deleteButton_is, &QPushButton::clicked, this, &SendCoinsEntry::deleteClicked);
     connect(ui->deleteButton_s, &QPushButton::clicked, this, &SendCoinsEntry::deleteClicked);
@@ -115,6 +116,17 @@ void SendCoinsEntry::clear()
     updateDisplayUnit();
 }
 
+void SendCoinsEntry::payAmountChangedInternal()
+{
+    const auto send_assets = ui->payAmount->fullValue();
+    if (send_assets.first == Params().GetConsensus().pegged_asset) {
+        ui->checkboxSubtractFeeFromAmount->setEnabled(true);
+    } else {
+        ui->checkboxSubtractFeeFromAmount->setCheckState(Qt::Unchecked);
+        ui->checkboxSubtractFeeFromAmount->setEnabled(false);
+    }
+}
+
 void SendCoinsEntry::checkSubtractFeeFromAmount()
 {
     ui->checkboxSubtractFeeFromAmount->setChecked(true);
diff --git a/src/qt/sendcoinsentry.h b/src/qt/sendcoinsentry.h
@@ -58,6 +58,7 @@ public Q_SLOTS:
     void subtractFeeFromAmountChanged();
 
 private Q_SLOTS:
+    void payAmountChangedInternal();
     void deleteClicked();
     void useAvailableBalanceClicked();
     void on_payTo_textChanged(const QString &address);
