QT autoscale font size for fixed rect in value labels

bitcoin-atom · Mar 14, 2018 · 3ba8ddf · 3ba8ddf
1 parent f7feff8
commit 3ba8ddf
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Showing 8 changed files with 54 additions and 29 deletions.
diff --git a/src/qt/forms/lastsendtransactionview.ui b/src/qt/forms/lastsendtransactionview.ui
@@ -283,6 +283,9 @@ padding-right: 17px;</string>
             <property name="text">
              <string>[BCA]</string>
             </property>
+            <property name="alignment">
+             <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+            </property>
            </widget>
           </item>
          </layout>

diff --git a/src/qt/forms/overviewpage.ui b/src/qt/forms/overviewpage.ui
@@ -871,9 +871,9 @@ border-image: url(:/icons/qr_ico);</string>
               <number>0</number>
              </property>
              <item alignment="Qt::AlignBottom">
-              <widget class="QLabel" name="label_7">
+              <widget class="QLabel" name="labelTotalCaption">
                <property name="sizePolicy">
-                <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+                <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
                  <horstretch>0</horstretch>
                  <verstretch>0</verstretch>
                 </sizepolicy>
@@ -961,14 +961,14 @@ font-size: 28px;</string>
                 <bool>false</bool>
                </property>
                <property name="alignment">
-                <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
+                <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
                </property>
               </widget>
              </item>
              <item alignment="Qt::AlignBottom">
-              <widget class="QLabel" name="label_8">
+              <widget class="QLabel" name="labelTotalUnit">
                <property name="sizePolicy">
-                <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+                <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
                  <horstretch>0</horstretch>
                  <verstretch>0</verstretch>
                 </sizepolicy>

diff --git a/src/qt/forms/sendcoinsdialog.ui b/src/qt/forms/sendcoinsdialog.ui
@@ -253,8 +253,8 @@ font-weight: 500;</string>
                  <property name="styleSheet">
                   <string notr="true">background-color: transparent;
 font-family: &quot;Roboto Mono&quot;;
-font-size: 28px;
-font-weight: 700;</string>
+font-weight: 700;
+font-size: 28px;</string>
                  </property>
                  <property name="text">
                   <string>0.00</string>

diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
@@ -52,6 +52,7 @@
 #include <QTextDocument> // for Qt::mightBeRichText
 #include <QThread>
 #include <QMouseEvent>
+#include <QFontMetrics>
 
 #if QT_VERSION < 0x050000
 #include <QUrl>
@@ -77,6 +78,24 @@ extern double NSAppKitVersionNumber;
 
 namespace GUIUtil {
 
+int getFontPixelSize(const QString& str, int minFontPixelSize, int maxFontPixelSize, int maxRectWidth, QString fontFamilyName, int fontWeight)
+{
+    int res = minFontPixelSize;
+    for (int i = maxFontPixelSize; i >= minFontPixelSize; --i) {
+        QFont font(fontFamilyName);
+        font.setPixelSize(i);
+        font.setWeight(fontWeight);
+        QFontMetrics fm(font);
+        QRect rect = fm.boundingRect(str);
+        int textWidth = rect.width();
+        if (textWidth <= maxRectWidth) {
+            res = i;
+            break;
+        }
+    }
+    return res;
+}
+
 QString dateTimeStr(const QDateTime &date)
 {
     return date.date().toString(Qt::SystemLocaleShortDate) + QString(" ") + date.toString("hh:mm");

diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
@@ -33,6 +33,8 @@ QT_END_NAMESPACE
  */
 namespace GUIUtil
 {
+    int getFontPixelSize(const QString& str, int minFontPixelSize, int maxFontPixelSize, int maxRectWidth, QString fontFamilyName, int fontWeight);
+
     // Create human-readable string from date
     QString dateTimeStr(const QDateTime &datetime);
     QString dateTimeStr(qint64 nTime);

diff --git a/src/qt/lastsendtransactionview.cpp b/src/qt/lastsendtransactionview.cpp
@@ -4,6 +4,7 @@
 #include <qt/platformstyle.h>
 #include <qt/bitcoinunits.h>
 #include <qt/transactionrecord.h>
+#include <qt/guiutil.h>
 
 LastSendTransactionView::LastSendTransactionView(const PlatformStyle *platformStyle, QWidget *parent) :
     QWidget(parent),
@@ -23,7 +24,13 @@ void LastSendTransactionView::setAmount(const CAmount& balance)
     if (amount < 0) {
         amount = -amount;
     }
-    ui->amountLabel->setText(BitcoinUnits::format(BitcoinUnits::Unit::BTC_rounded, amount, false, BitcoinUnits::separatorAlways));
+
+    QString amountStr = BitcoinUnits::format(BitcoinUnits::Unit::BTC, amount, false, BitcoinUnits::separatorAlways);
+    int fontSize = GUIUtil::getFontPixelSize(amountStr, 5, 18, 85, QString("Roboto Mono"), 700);
+    QString labelAmountStyle = "font-family: \"Roboto Mono\"; font-weight: 700; font-size: ";
+    labelAmountStyle = labelAmountStyle + QString(std::to_string(fontSize).c_str()) + QString("px;");
+    ui->amountLabel->setStyleSheet(labelAmountStyle);
+    ui->amountLabel->setText(amountStr);
 }
 
 void LastSendTransactionView::setStatus(TransactionStatus& status)

diff --git a/src/qt/overviewpage.cpp b/src/qt/overviewpage.cpp
@@ -18,7 +18,6 @@
 
 #include <QAbstractItemDelegate>
 #include <QPainter>
-#include <QFontMetrics>
 
 #define DECORATION_SIZE 54
 #define NUM_ITEMS 4
@@ -206,28 +205,18 @@ void OverviewPage::setBalance(const CAmount& balance, const CAmount& unconfirmed
     currentWatchOnlyBalance = watchOnlyBalance;
     currentWatchUnconfBalance = watchUnconfBalance;
     currentWatchImmatureBalance = watchImmatureBalance;
-    ui->labelBalance->setText(BitcoinUnits::format(BitcoinUnits::Unit::BTC_rounded, balance, false, BitcoinUnits::separatorAlways));
-    ui->labelUnconfirmed->setText(BitcoinUnits::format(BitcoinUnits::Unit::BTC_rounded, unconfirmedBalance, false, BitcoinUnits::separatorAlways));
+    ui->labelBalance->setText(BitcoinUnits::format(BitcoinUnits::Unit::BTC, balance, false, BitcoinUnits::separatorAlways));
+    ui->labelUnconfirmed->setText(BitcoinUnits::format(BitcoinUnits::Unit::BTC, unconfirmedBalance, false, BitcoinUnits::separatorAlways));
     //ui->labelImmature->setText(BitcoinUnits::formatWithUnit(unit, immatureBalance, false, BitcoinUnits::separatorAlways));
 
     //ui->labelTotal->setText(BitcoinUnits::format(unit, balance + unconfirmedBalance + immatureBalance, false, BitcoinUnits::separatorAlways));
-    /*QString textTotal = BitcoinUnits::format(unit, balance + unconfirmedBalance + immatureBalance, false, BitcoinUnits::separatorAlways);
-    int totalLabelWidth = ui->labelTotal->width();
-    int minFontSize = 5;
-    for (int i = 28; i >= minFontSize; --i) {
-        QFont font("Roboto Mono", i);
-        QFontMetrics fm(font);
-        QRect rect = fm.boundingRect(totalLabelWidth);
-        if (rect.width() <= totalLabelWidth || i == minFontSize) {
-            QString totalLabelStyle = "background-color: transparent; color: rgb(255, 198, 0); font-family: \"Roboto Mono\"; font-weight: 700; font-size: ";
-            totalLabelStyle = totalLabelStyle + QString(std::to_string(i).c_str()) + QString("px;");
-            ui->labelTotal->setStyleSheet(totalLabelStyle);
-            ui->labelTotal->setText(textTotal);
-            break;
-        }
-    }*/
-
-    ui->labelTotal->setText(BitcoinUnits::format(BitcoinUnits::Unit::BTC_rounded, balance + unconfirmedBalance, false, BitcoinUnits::separatorAlways));
+    QString textTotal = BitcoinUnits::format(BitcoinUnits::Unit::BTC, balance + unconfirmedBalance, false, BitcoinUnits::separatorAlways);
+    int labelTotalMaxWidth = ui->frameTotal->width() - ui->labelTotalCaption->width() - ui->labelTotalUnit->width();
+    int fontSize = GUIUtil::getFontPixelSize(textTotal, 5, 28, labelTotalMaxWidth, QString("Roboto Mono"), 700);
+    QString totalLabelStyle = "background-color: transparent; color: rgb(255, 198, 0); font-family: \"Roboto Mono\"; font-weight: 700; font-size: ";
+    totalLabelStyle = totalLabelStyle + QString(std::to_string(fontSize).c_str()) + QString("px;");
+    ui->labelTotal->setStyleSheet(totalLabelStyle);
+    ui->labelTotal->setText(textTotal);
 
     //ui->labelWatchAvailable->setText(BitcoinUnits::formatWithUnit(unit, watchOnlyBalance, false, BitcoinUnits::separatorAlways));
     //ui->labelWatchPending->setText(BitcoinUnits::formatWithUnit(unit, watchUnconfBalance, false, BitcoinUnits::separatorAlways));

diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
@@ -586,7 +586,12 @@ void SendCoinsDialog::setBalance(const CAmount& balance, const CAmount& unconfir
 
     if(model && model->getOptionsModel())
     {
-        ui->labelBalance->setText(BitcoinUnits::format(BitcoinUnits::Unit::BTC_rounded, balance));
+        QString balanceStr = BitcoinUnits::format(BitcoinUnits::Unit::BTC, balance);
+        int fontSize = GUIUtil::getFontPixelSize(balanceStr, 5, 28, 198, QString("Roboto Mono"), 700);
+        QString labelBalanceStyle = "background-color: transparent; font-family: \"Roboto Mono\"; font-weight: 700; font-size: ";
+        labelBalanceStyle = labelBalanceStyle + QString(std::to_string(fontSize).c_str()) + QString("px;");
+        ui->labelBalance->setStyleSheet(labelBalanceStyle);
+        ui->labelBalance->setText(balanceStr);
     }
 }