// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
// Copyright 2014 Tony Wasserka
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the owner nor the names of its contributors may
// be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <cstdlib>
#include <QLineEdit>
#include <QRegExpValidator>
#include "common/assert.h"
#include "spinbox.h"
CSpinBox::CSpinBox(QWidget* parent) : QAbstractSpinBox(parent), min_value(-100), max_value(100), value(0), base(10), num_digits(0)
{
// TODO: Might be nice to not immediately call the slot.
// Think of an address that is being replaced by a different one, in which case a lot
// invalid intermediate addresses would be read from during editing.
connect(lineEdit(), SIGNAL(textEdited(QString)), this, SLOT(OnEditingFinished()));
UpdateText();
}
void CSpinBox::SetValue(qint64 val)
{
auto old_value = value;
value = std::max(std::min(val, max_value), min_value);
if (old_value != value) {
UpdateText();
emit ValueChanged(value);
}
}
void CSpinBox::SetRange(qint64 min, qint64 max)
{
min_value = min;
max_value = max;
SetValue(value);
UpdateText();
}
void CSpinBox::stepBy(int steps)
{
auto new_value = value;
// Scale number of steps by the currently selected digit
// TODO: Move this code elsewhere and enable it.
// TODO: Support for num_digits==0, too
// TODO: Support base!=16, too
// TODO: Make the cursor not jump back to the end of the line...
/*if (base == 16 && num_digits > 0) {
int digit = num_digits - (lineEdit()->cursorPosition() - prefix.length()) - 1;
digit = std::max(0, std::min(digit, num_digits - 1));
steps <<= digit * 4;
}*/
// Increment "new_value" by "steps", and perform annoying overflow checks, too.
if (steps < 0 && new_value + steps > new_value) {
new_value = std::numeric_limits<qint64>::min();
} else if (steps > 0 && new_value + steps < new_value) {
new_value = std::numeric_limits<qint64>::max();
} else {
new_value += steps;
}
SetValue(new_value);
UpdateText();
}
QAbstractSpinBox::StepEnabled CSpinBox::stepEnabled() const
{
StepEnabled ret = StepNone;
if (value > min_value)
ret |= StepDownEnabled;
if (value < max_value)
ret |= StepUpEnabled;
return ret;
}
void CSpinBox::SetBase(int base)
{
this->base = base;
UpdateText();
}
void CSpinBox::SetNumDigits(int num_digits)
{
this->num_digits = num_digits;
UpdateText();
}
void CSpinBox::SetPrefix(const QString& prefix)
{
this->prefix = prefix;
UpdateText();
}
void CSpinBox::SetSuffix(const QString& suffix)
{
this->suffix = suffix;
UpdateText();
}
static QString StringToInputMask(const QString& input) {
QString mask = input;
// ... replace any special characters by their escaped counterparts ...
mask.replace("\\", "\\\\");
mask.replace("A", "\\A");
mask.replace("a", "\\a");
mask.replace("N", "\\N");
mask.replace("n", "\\n");
mask.replace("X", "\\X");
mask.replace("x", "\\x");
mask.replace("9", "\\9");
mask.replace("0", "\\0");
mask.replace("D", "\\D");
mask.replace("d", "\\d");
mask.replace("#", "\\#");
mask.replace("H", "\\H");
mask.replace("h", "\\h");
mask.replace("B", "\\B");
mask.replace("b", "\\b");
mask.replace(">", "\\>");
mask.replace("<", "\\<");
mask.replace("!", "\\!");
return mask;
}
void CSpinBox::UpdateText()
{
// If a fixed number of digits is used, we put the line edit in insertion mode by setting an
// input mask.
QString mask;
if (num_digits != 0) {
mask += StringToInputMask(prefix);
// For base 10 and negative range, demand a single sign character
if (HasSign())
mask += "X"; // identified as "-" or "+" in the validator
// Uppercase digits greater than 9.
mask += ">";
// The greatest signed 64-bit number has 19 decimal digits.
// TODO: Could probably make this more generic with some logarithms.
// For reference, unsigned 64-bit can have up to 20 decimal digits.
int digits = (num_digits != 0) ? num_digits
: (base == 16) ? 16
: (base == 10) ? 19
: 0xFF; // fallback case...
// Match num_digits digits
// Digits irrelevant to the chosen number base are filtered in the validator
mask += QString("H").repeated(std::max(num_digits, 1));
// Switch off case conversion
mask += "!";
mask += StringToInputMask(suffix);
}
lineEdit()->setInputMask(mask);
// Set new text without changing the cursor position. This will cause the cursor to briefly
// appear at the end of the line and then to jump back to its original position. That's
// a bit ugly, but better than having setText() move the cursor permanently all the time.
int cursor_position = lineEdit()->cursorPosition();
lineEdit()->setText(TextFromValue());
lineEdit()->setCursorPosition(cursor_position);
}
QString CSpinBox::TextFromValue()
{
return prefix
+ QString(HasSign() ? ((value < 0) ? "-" : "+") : "")
+ QString("%1").arg(std::abs(value), num_digits, base, QLatin1Char('0')).toUpper()
+ suffix;
}
qint64 CSpinBox::ValueFromText()
{
unsigned strpos = prefix.length();
QString num_string = text().mid(strpos, text().length() - strpos - suffix.length());
return num_string.toLongLong(nullptr, base);
}
bool CSpinBox::HasSign() const
{
return base == 10 && min_value < 0;
}
void CSpinBox::OnEditingFinished()
{
// Only update for valid input
QString input = lineEdit()->text();
int pos = 0;
if (QValidator::Acceptable == validate(input, pos))
SetValue(ValueFromText());
}
QValidator::State CSpinBox::validate(QString& input, int& pos) const
{
if (!prefix.isEmpty() && input.left(prefix.length()) != prefix)
return QValidator::Invalid;
int strpos = prefix.length();
// Empty "numbers" allowed as intermediate values
if (strpos >= input.length() - HasSign() - suffix.length())
return QValidator::Intermediate;
DEBUG_ASSERT(base <= 10 || base == 16);
QString regexp;
// Demand sign character for negative ranges
if (HasSign())
regexp += "[+\\-]";
// Match digits corresponding to the chosen number base.
regexp += QString("[0-%1").arg(std::min(base, 9));
if (base == 16) {
regexp += "a-fA-F";
}
regexp += "]";
// Specify number of digits
if (num_digits > 0) {
regexp += QString("{%1}").arg(num_digits);
} else {
regexp += "+";
}
// Match string
QRegExp num_regexp(regexp);
int num_pos = strpos;
QString sub_input = input.mid(strpos, input.length() - strpos - suffix.length());
if (!num_regexp.exactMatch(sub_input) && num_regexp.matchedLength() == 0)
return QValidator::Invalid;
sub_input = sub_input.left(num_regexp.matchedLength());
bool ok;
qint64 val = sub_input.toLongLong(&ok, base);
if (!ok)
return QValidator::Invalid;
// Outside boundaries => don't accept
if (val < min_value || val > max_value)
return QValidator::Invalid;
// Make sure we are actually at the end of this string...
strpos += num_regexp.matchedLength();
if (!suffix.isEmpty() && input.mid(strpos) != suffix) {
return QValidator::Invalid;
} else {
strpos += suffix.length();
}
if (strpos != input.length())
return QValidator::Invalid;
// At this point we can say for sure that the input is fine. Let's fix it up a bit though
input.replace(num_pos, sub_input.length(), sub_input.toUpper());
return QValidator::Acceptable;
}
