Custom fonts registration and usage (#50)

* Register custom fonts once

The QHelpers functions registered the fonts on every call, which is not
necessary.

- added anonymous namespace for internal linkage
- added helper function for font registration

* Move helper functions from class to namespace

Fixes a possible memleak, because up until now the QHelpers object was
allocated with new without a parent QObject or following delete.

* Removed unused functions

src/helpers.cpp

@@ -1,31 +1,27 @@
 #include "helpers.h"
 
-QHelpers::QHelpers(QObject *parent) :
-    QObject(parent)
+#include <QPlainTextEdit>
+#include <QTextEdit>
+
+namespace qhelpers
 {
-    // Meow
-}
 
-void QHelpers::normalizeFont(QPlainTextEdit *edit) {
+// TODO: wouldn't it be enough to setFont on the QWidget?
+
+void normalizeFont(QPlainTextEdit *edit) {
     #ifdef Q_OS_LINUX
-        // Add custom monospaced font
-        QFontDatabase fontDB;
-        fontDB.addApplicationFont(":/new/prefix1/fonts/Inconsolata-Regular.ttf");
-
         QFont anonFont("Inconsolata", 12);
         QTextDocument *out_doc = edit->document();
         out_doc->setDefaultFont(anonFont);
     #endif
 }
 
-void QHelpers::normalizeEditFont(QTextEdit *edit) {
+void normalizeEditFont(QTextEdit *edit) {
     #ifdef Q_OS_LINUX
-        // Add custom monospaced font
-        QFontDatabase fontDB;
-        fontDB.addApplicationFont(":/new/prefix1/fonts/Inconsolata-Regular.ttf");
-
         QFont anonFont("Inconsolata", 12);
         QTextDocument *out_doc = edit->document();
         out_doc->setDefaultFont(anonFont);
     #endif
 }
+
+} // end namespace

src/helpers.h

@@ -1,24 +1,13 @@
 #ifndef QHELPERS_H
 #define QHELPERS_H
 
-#include <QObject>
-#include <QTextEdit>
-#include <QPlainTextEdit>
+class QPlainTextEdit;
+class QTextEdit;
 
-#include "mainwindow.h"
-
-class QHelpers : public QObject
+namespace qhelpers
 {
-    Q_OBJECT
-public:
-    explicit QHelpers(QObject *parent = 0);
     void normalizeFont(QPlainTextEdit *edit);
     void normalizeEditFont(QTextEdit *edit);
-
-signals:
-
-public slots:
-
-};
+}
 
 #endif // HELPERS_H

src/mainwindow.cpp

@@ -34,29 +34,23 @@
 #include <QGraphicsScene>
 #include <QGraphicsView>
 
-static void adjustColumns(QTreeWidget *tw) {
-    int count = tw->columnCount();
-    for (int i = 0; i != count; ++i) {
-        tw->resizeColumnToContents(i);
+#include <cassert>
+
+namespace
+{
+    void registerCustomFonts()
+    {
+        int ret = QFontDatabase::addApplicationFont(":/new/prefix1/fonts/Anonymous Pro.ttf");
+        assert(-1 != ret && "unable to register Anonymous Pro.ttf");
+
+        ret = QFontDatabase::addApplicationFont(":/new/prefix1/fonts/Inconsolata-Regular.ttf");
+        assert(-1 != ret && "unable to register Inconsolata-Regular.ttf");
+
+        // do not issue a warning in release
+        Q_UNUSED(ret)
     }
 }
 
-static void appendRow(QTreeWidget *tw, const QString &str, const QString &str2=NULL,
-                      const QString &str3=NULL, const QString &str4=NULL, const QString &str5=NULL) {
-    QTreeWidgetItem *tempItem = new QTreeWidgetItem();
-    // Fill dummy hidden column
-    tempItem->setText(0,"0");
-    tempItem->setText(1,str);
-    if (str2!=NULL)
-        tempItem->setText(2, str2);
-    if (str3!=NULL)
-        tempItem->setText(3, str3);
-    if (str4!=NULL)
-        tempItem->setText(4, str4);
-    if (str5!=NULL)
-        tempItem->setText(5, str5);
-    tw->insertTopLevelItem(0, tempItem);
-}
 
 MainWindow::MainWindow(QWidget *parent, QRCore *kore) :
     QMainWindow(parent),
@@ -69,8 +63,8 @@ MainWindow::MainWindow(QWidget *parent, QRCore *kore) :
 
     doLock = false;
 
-    // Add custom font
-    QFontDatabase::addApplicationFont(":/new/prefix1/fonts/Anonymous Pro.ttf");
+    registerCustomFonts();
+
 
     /*
     * Toolbar
@@ -134,8 +128,7 @@ MainWindow::MainWindow(QWidget *parent, QRCore *kore) :
     addToolBar(graphicsBar);
 
     // Fix output panel font
-    QHelpers *help = new QHelpers();
-    help->normalizeFont(ui->consoleOutputTextEdit);
+    qhelpers::normalizeFont(ui->consoleOutputTextEdit);
 
     /*
      * Dock Widgets

src/widgets/memwidget/memorywidget.cpp

@@ -74,11 +74,10 @@ MemoryWidget::MemoryWidget(MainWindow *main, QWidget *parent) :
     ui->fcnNameEdit->setTextMargins(5, 0, 0, 0);
 
     // Normalize fonts for other OS
-    QHelpers *help = new QHelpers();
-    help->normalizeFont(this->disasTextEdit);
-    help->normalizeEditFont(this->hexOffsetText);
-    help->normalizeEditFont(this->hexHexText);
-    help->normalizeEditFont(this->hexASCIIText);
+    qhelpers::normalizeFont(this->disasTextEdit);
+    qhelpers::normalizeEditFont(this->hexOffsetText);
+    qhelpers::normalizeEditFont(this->hexHexText);
+    qhelpers::normalizeEditFont(this->hexASCIIText);
 
     // Popup menu on Settings toolbutton
     QMenu *memMenu = new QMenu();