1 files changed, 34 insertions, 14 deletions

diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index 4b030fdaa0..5fc7b57a41 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2014 The Bitcoin Core developers
+// Copyright (c) 2011-2015 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -124,7 +124,7 @@ void SendCoinsDialog::setClientModel(ClientModel *clientModel)
     this->clientModel = clientModel;
 
     if (clientModel) {
-        connect(clientModel, SIGNAL(numBlocksChanged(int,QDateTime)), this, SLOT(updateSmartFeeLabel()));
+        connect(clientModel, SIGNAL(numBlocksChanged(int,QDateTime,double)), this, SLOT(updateSmartFeeLabel()));
     }
 }
 
@@ -373,8 +373,6 @@ SendCoinsEntry *SendCoinsDialog::addEntry()
     connect(entry, SIGNAL(payAmountChanged()), this, SLOT(coinControlUpdateLabels()));
     connect(entry, SIGNAL(subtractFeeFromAmountChanged()), this, SLOT(coinControlUpdateLabels()));
 
-    updateTabsAndLabels();
-
     // Focus the field, so that entry can start immediately
     entry->clear();
     entry->setFocus();
@@ -383,6 +381,8 @@ SendCoinsEntry *SendCoinsDialog::addEntry()
     QScrollBar* bar = ui->scrollArea->verticalScrollBar();
     if(bar)
         bar->setSliderPosition(bar->maximum());
+
+    updateTabsAndLabels();
     return entry;
 }
 
@@ -585,7 +585,7 @@ void SendCoinsDialog::updateFeeSectionControls()
     ui->checkBoxMinimumFee      ->setEnabled(ui->radioCustomFee->isChecked());
     ui->labelMinFeeWarning      ->setEnabled(ui->radioCustomFee->isChecked());
     ui->radioCustomPerKilobyte  ->setEnabled(ui->radioCustomFee->isChecked() && !ui->checkBoxMinimumFee->isChecked());
-    ui->radioCustomAtLeast      ->setEnabled(ui->radioCustomFee->isChecked() && !ui->checkBoxMinimumFee->isChecked());
+    ui->radioCustomAtLeast      ->setEnabled(ui->radioCustomFee->isChecked() && !ui->checkBoxMinimumFee->isChecked() && CoinControlDialog::coinControl->HasSelected());
     ui->customFee               ->setEnabled(ui->radioCustomFee->isChecked() && !ui->checkBoxMinimumFee->isChecked());
 }
 
@@ -600,7 +600,10 @@ void SendCoinsDialog::updateGlobalFeeVariables()
     {
         nTxConfirmTarget = defaultConfirmTarget;
         payTxFee = CFeeRate(ui->customFee->value());
-        fPayAtLeastCustomFee = ui->radioCustomAtLeast->isChecked();
+
+        // if user has selected to set a minimum absolute fee, pass the value to coincontrol
+        // set nMinimumTotalFee to 0 in case of user has selected that the fee is per KB
+        CoinControlDialog::coinControl->nMinimumTotalFee = ui->radioCustomAtLeast->isChecked() ? ui->customFee->value() : 0;
     }
 
     fSendFreeTransactions = ui->checkBoxFreeTx->isChecked();
@@ -633,18 +636,21 @@ void SendCoinsDialog::updateSmartFeeLabel()
         return;
 
     int nBlocksToConfirm = defaultConfirmTarget - ui->sliderSmartFee->value();
-    CFeeRate feeRate = mempool.estimateFee(nBlocksToConfirm);
+    int estimateFoundAtBlocks = nBlocksToConfirm;
+    CFeeRate feeRate = mempool.estimateSmartFee(nBlocksToConfirm, &estimateFoundAtBlocks);
     if (feeRate <= CFeeRate(0)) // not enough data => minfee
     {
-        ui->labelSmartFee->setText(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), CWallet::GetRequiredFee(1000)) + "/kB");
+        ui->labelSmartFee->setText(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(),
+                                                                std::max(CWallet::fallbackFee.GetFeePerK(), CWallet::GetRequiredFee(1000))) + "/kB");
         ui->labelSmartFee2->show(); // (Smart fee not initialized yet. This usually takes a few blocks...)
         ui->labelFeeEstimation->setText("");
     }
     else
     {
-        ui->labelSmartFee->setText(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(), feeRate.GetFeePerK()) + "/kB");
+        ui->labelSmartFee->setText(BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(),
+                                                                std::max(feeRate.GetFeePerK(), CWallet::GetRequiredFee(1000))) + "/kB");
         ui->labelSmartFee2->hide();
-        ui->labelFeeEstimation->setText(tr("Estimated to begin confirmation within %n block(s).", "", nBlocksToConfirm));
+        ui->labelFeeEstimation->setText(tr("Estimated to begin confirmation within %n block(s).", "", estimateFoundAtBlocks));
     }
 
     updateFeeMinimizedLabel();
@@ -706,8 +712,7 @@ void SendCoinsDialog::coinControlFeatureChanged(bool checked)
     if (!checked && model) // coin control features disabled
         CoinControlDialog::coinControl->SetNull();
 
-    if (checked)
-        coinControlUpdateLabels();
+    coinControlUpdateLabels();
 }
 
 // Coin Control: button inputs -> show actual coin control dialog
@@ -781,8 +786,23 @@ void SendCoinsDialog::coinControlChangeEdited(const QString& text)
 // Coin Control: update labels
 void SendCoinsDialog::coinControlUpdateLabels()
 {
-    if (!model || !model->getOptionsModel() || !model->getOptionsModel()->getCoinControlFeatures())
+    if (!model || !model->getOptionsModel())
+        return;
+
+    if (model->getOptionsModel()->getCoinControlFeatures())
+    {
+        // enable minimum absolute fee UI controls
+        ui->radioCustomAtLeast->setVisible(true);
+
+        // only enable the feature if inputs are selected
+        ui->radioCustomAtLeast->setEnabled(CoinControlDialog::coinControl->HasSelected());
+    }
+    else
+    {
+        // in case coin control is disabled (=default), hide minimum absolute fee UI controls
+        ui->radioCustomAtLeast->setVisible(false);
         return;
+    }
 
     // set pay amounts
     CoinControlDialog::payAmounts.clear();
@@ -790,7 +810,7 @@ void SendCoinsDialog::coinControlUpdateLabels()
     for(int i = 0; i < ui->entries->count(); ++i)
     {
         SendCoinsEntry *entry = qobject_cast<SendCoinsEntry*>(ui->entries->itemAt(i)->widget());
-        if(entry)
+        if(entry && !entry->isHidden())
         {
             SendCoinsRecipient rcp = entry->getValue();
             CoinControlDialog::payAmounts.append(rcp.amount);