Can debugger

Add hex spinbox

Qt/CMakeLists.txt

@@ -21,6 +21,8 @@ find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets Svg WebSockets)
 
 add_subdirectory(qwt)
 
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+
 set(PROJECT_SOURCES
         simulators/sim-cvs_i10.h
         simulators/sim-cvs_i10.cpp
@@ -43,6 +45,8 @@ set(PROJECT_SOURCES
         helpers.h
         helpers.cpp
         IterableEnum.hpp
+        hex_spinbox.h
+        hex_spinbox.cpp
         better_radiobutton.h
         better_radiobutton.cpp
         led.h

Qt/hex_spinbox.cpp

@@ -0,0 +1,44 @@
+#include "hex_spinbox.h"
+
+HexSpinBox::HexSpinBox(QWidget *parent,
+           bool showPrefix,
+           const QString &format) :
+      QSpinBox(parent),
+      format(format)
+{
+    // Validates hex strings up to 8 chars with or w/out leading "0x" prefix.
+    // For arbitrary prefix/suffix, the regex could be built dynamically
+    //  in validate(), or override setPrefix()/setSuffix() methods.
+    const QRegularExpression rx("(?:0[xX])?[0-9A-Fa-f]{1,8}");
+    validator = new QRegularExpressionValidator(rx, this);
+    setShowPrefix(showPrefix);
+}
+
+void HexSpinBox::setShowPrefix(bool show)
+{
+    if (show)
+        setPrefix(QStringLiteral("0x"));
+    else
+        setPrefix(QString());
+}
+
+void HexSpinBox::setFormat(const QString &text)
+{
+    format = text;
+    this->lineEdit()->setText(textFromValue(value()));
+}
+
+QValidator::State HexSpinBox::validate(QString &text, int &pos) const
+{
+    return validator->validate(text, pos);
+}
+
+int HexSpinBox::valueFromText(const QString &text) const
+{
+    return text.toInt(0, 16);
+}
+
+QString HexSpinBox::textFromValue(int value) const
+{
+    return QString().asprintf(qPrintable(format), value);
+}

Qt/hex_spinbox.h

@@ -0,0 +1,34 @@
+#ifndef _HEXSPINBOX_H_
+#define _HEXSPINBOX_H_
+
+#include <QSpinBox>
+#include <QLineEdit>
+#include <QRegularExpressionValidator>
+
+// NOTE: Since QSpinBox uses int as the storage type, the effective editing range
+//   is +/- 0x7FFF FFFF, so it can't handle a full unsigned int.
+// QDoubleSpinBox would be a more suitable base class if a wider range is needed.
+class HexSpinBox : public QSpinBox
+{
+    Q_OBJECT
+
+  public:
+    HexSpinBox(QWidget *parent = nullptr,
+               bool showPrefix = false,
+               const QString &format = QStringLiteral("%X"));
+
+  public slots:
+    void setShowPrefix(bool show);
+    void setFormat(const QString &text);
+
+  protected:
+    QValidator::State validate(QString &text, int &pos) const override;
+    int valueFromText(const QString &text) const override;
+    QString textFromValue(int value) const override;
+
+  private:
+    QRegularExpressionValidator *validator;
+    QString format;
+};
+
+#endif // _HEXSPINBOX_H_