[pulseview.git] / pv / views / decoder_output / QHexView.cpp

/*
 * This file is part of the PulseView project.
 *
 * Copyright (C) 2015 Victor Anjin <virinext@gmail.com>
 * Copyright (C) 2019 Soeren Apel <soeren@apelpie.net>
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2015
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <QApplication>
#include <QClipboard>
#include <QFont>
#include <QKeyEvent>
#include <QScrollBar>
#include <QSize>
#include <QPainter>
#include <QPaintEvent>

#include "QHexView.hpp"

const unsigned int BYTES_PER_LINE   = 16;
const unsigned int HEXCHARS_IN_LINE = BYTES_PER_LINE * 3 - 1;
const unsigned int GAP_ADR_HEX      = 10;
const unsigned int GAP_HEX_ASCII    = 10;
const unsigned int GAP_ASCII_SLIDER = 5;


QHexView::QHexView(QWidget *parent):
	QAbstractScrollArea(parent),
	data_(nullptr)
{
	setFont(QFont("Courier", 10));

	charWidth_ = fontMetrics().boundingRect('X').width();
	charHeight_ = fontMetrics().height();

	// Determine X coordinates of the three sub-areas
	posAddr_  = 0;
	posHex_   = 10 * charWidth_ + GAP_ADR_HEX;
	posAscii_ = posHex_ + HEXCHARS_IN_LINE * charWidth_ + GAP_HEX_ASCII;

	setFocusPolicy(Qt::StrongFocus);
}

void QHexView::setData(QByteArray *data)
{
	verticalScrollBar()->setValue(0);

	data_ = data;
	cursorPos_ = 0;
	resetSelection(0);
}

void QHexView::showFromOffset(size_t offset)
{
	if (data_ && (offset < (size_t)data_->count())) {
		setCursorPos(offset * 2);

		int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
		verticalScrollBar() -> setValue(cursorY);
	}

	viewport()->update();
}

void QHexView::clear()
{
	verticalScrollBar()->setValue(0);
	data_ = nullptr;

	viewport()->update();
}

QSize QHexView::getFullSize() const
{
	size_t width = posAscii_ + (BYTES_PER_LINE * charWidth_) +
		GAP_ASCII_SLIDER + verticalScrollBar()->width();

	if (!data_)
		return QSize(width, 0);

	size_t height = data_->count() / BYTES_PER_LINE;

	if (data_->count() % BYTES_PER_LINE)
		height++;

	height *= charHeight_;

	return QSize(width, height);
}

void QHexView::paintEvent(QPaintEvent *event)
{
	QPainter painter(viewport());

	// Calculate and update the widget and paint area sizes
	QSize widgetSize = getFullSize();
	setMinimumWidth(widgetSize.width());
	setMaximumWidth(widgetSize.width());
	QSize areaSize = viewport()->size();

	verticalScrollBar()->setPageStep(areaSize.height() / charHeight_);
	verticalScrollBar()->setRange(0, (widgetSize.height() - areaSize.height()) / charHeight_ + 1);

	// Fill widget background
	painter.fillRect(event->rect(), palette().color(QPalette::Base));

	if (!data_ || (data_->size() == 0)) {
		painter.setPen(palette().color(QPalette::Text));
		QString s = tr("No data available");
		int x = (areaSize.width() - fontMetrics().boundingRect(s).width()) / 2;
		int y = areaSize.height() / 2;
		painter.drawText(x, y, s);
		return;
	}

	// Determine first/last line indices
	size_t firstLineIdx = verticalScrollBar()->value();

	size_t lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;
	if (lastLineIdx > (data_->count() / BYTES_PER_LINE)) {
		lastLineIdx = data_->count() / BYTES_PER_LINE;
		if (data_->count() % BYTES_PER_LINE)
			lastLineIdx++;
	}

	// Fill address area background
	painter.fillRect(QRect(posAddr_, event->rect().top(),
		posHex_ - (GAP_ADR_HEX / 2), height()), palette().color(QPalette::Window));

	// Paint divider line between hex and ASCII areas
	int line_x = posAscii_ - (GAP_HEX_ASCII / 2);
	painter.setPen(palette().color(QPalette::Midlight));
	painter.drawLine(line_x, event->rect().top(), line_x, height());

	// Paint address area
	painter.setPen(palette().color(QPalette::ButtonText));

	int yStart = charHeight_;
	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {

		QString address = QString("%1").arg(lineIdx * 16, 10, 16, QChar('0')).toUpper();
		painter.drawText(posAddr_, y, address);
		y += charHeight_;
	}

	// Paint hex values
	QBrush regular = painter.brush();
	QBrush selected = QBrush(palette().color(QPalette::Highlight));
	QByteArray data = data_->mid(firstLineIdx * BYTES_PER_LINE,
		(lastLineIdx - firstLineIdx) * BYTES_PER_LINE);

	yStart = charHeight_;
	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {

		painter.setBackgroundMode(Qt::OpaqueMode);

		int x = posHex_;
		for (size_t i = 0; i < BYTES_PER_LINE && ((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) < (size_t)data.size(); i++) {
			size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;

			if ((pos >= selectBegin_) && (pos < selectEnd_)) {
				painter.setBackground(selected);
				painter.setPen(palette().color(QPalette::HighlightedText));
			} else {
				painter.setBackground(regular);
				painter.setPen(palette().color(QPalette::Text));
			}

			// First nibble
			QString val = QString::number((data.at((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) & 0xF0) >> 4, 16).toUpper();
			painter.drawText(x, y, val);

			// Second nibble
			val = QString::number((data.at((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) & 0xF), 16).toUpper();
			painter.drawText(x + charWidth_, y, val);

			x += 3 * charWidth_;
		}

		y += charHeight_;
	}

	// Paint ASCII characters
	yStart = charHeight_;
	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {

		int x = posAscii_;
		for (size_t i = 0; ((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) < (size_t)data.size() && (i < BYTES_PER_LINE); i++) {
			char ch = data[(unsigned int)((lineIdx - firstLineIdx) * BYTES_PER_LINE + i)];

			if ((ch < 0x20) || (ch > 0x7E))
				ch = '.';

			size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
			if ((pos >= selectBegin_) && (pos < selectEnd_)) {
				painter.setBackground(selected);
				painter.setPen(palette().color(QPalette::HighlightedText));
			} else {
				painter.setBackground(regular);
				painter.setPen(palette().color(QPalette::Text));
			}

			painter.drawText(x, y, QString(ch));
			x += charWidth_;
		}

		y += charHeight_;
	}

	// Paint cursor
	if (hasFocus()) {
		int x = (cursorPos_ % (2 * BYTES_PER_LINE));
		int y = cursorPos_ / (2 * BYTES_PER_LINE);
		y -= firstLineIdx;
		int cursorX = (((x / 2) * 3) + (x % 2)) * charWidth_ + posHex_;
		int cursorY = y * charHeight_ + 4;
		painter.fillRect(cursorX, cursorY, 2, charHeight_, palette().color(QPalette::WindowText));
	}
}

void QHexView::keyPressEvent(QKeyEvent *event)
{
	bool setVisible = false;

	// Cursor movements
	if (event->matches(QKeySequence::MoveToNextChar)) {
		setCursorPos(cursorPos_ + 1);
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToPreviousChar)) {
		setCursorPos(cursorPos_ - 1);
		resetSelection(cursorPos_);
		setVisible = true;
	}

	if (event->matches(QKeySequence::MoveToEndOfLine)) {
		setCursorPos(cursorPos_ | ((BYTES_PER_LINE * 2) - 1));
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToStartOfLine)) {
		setCursorPos(cursorPos_ | (cursorPos_ % (BYTES_PER_LINE * 2)));
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToPreviousLine)) {
		setCursorPos(cursorPos_ - BYTES_PER_LINE * 2);
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToNextLine)) {
		setCursorPos(cursorPos_ + BYTES_PER_LINE * 2);
		resetSelection(cursorPos_);
		setVisible = true;
	}

	if (event->matches(QKeySequence::MoveToNextPage)) {
		setCursorPos(cursorPos_ + (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToPreviousPage)) {
		setCursorPos(cursorPos_ - (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToEndOfDocument)) {
		if (data_)
			setCursorPos(data_->count() * 2);
		resetSelection(cursorPos_);
		setVisible = true;
	}
	if (event->matches(QKeySequence::MoveToStartOfDocument)) {
		setCursorPos(0);
		resetSelection(cursorPos_);
		setVisible = true;
	}

	// Select commands
	if (event->matches(QKeySequence::SelectAll)) {
		resetSelection(0);
		if (data_)
			setSelection(2 * data_->count() + 1);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectNextChar)) {
		int pos = cursorPos_ + 1;
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectPreviousChar)) {
		int pos = cursorPos_ - 1;
		setSelection(pos);
		setCursorPos(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectEndOfLine)) {
		int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE)) + (2 * BYTES_PER_LINE);
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectStartOfLine)) {
		int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE));
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectPreviousLine)) {
		int pos = cursorPos_ - (2 * BYTES_PER_LINE);
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectNextLine)) {
		int pos = cursorPos_ + (2 * BYTES_PER_LINE);
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}

	if (event->matches(QKeySequence::SelectNextPage)) {
		int pos = cursorPos_ + (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectPreviousPage)) {
		int pos = cursorPos_ - (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectEndOfDocument)) {
		int pos = 0;
		if (data_)
			pos = data_->count() * 2;
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}
	if (event->matches(QKeySequence::SelectStartOfDocument)) {
		int pos = 0;
		setCursorPos(pos);
		setSelection(pos);
		setVisible = true;
	}

	if (event->matches(QKeySequence::Copy) && (data_)) {
		QString text;
		int idx = 0;
		int copyOffset = 0;

		QByteArray data = data_->mid(selectBegin_ / 2, (selectEnd_ - selectBegin_) / 2 + 1);
		if (selectBegin_ % 2) {
			text += QString::number((data.at((idx+1) / 2) & 0xF), 16);
			text += " ";
			idx++;
			copyOffset = 1;
		}

		int selectedSize = selectEnd_ - selectBegin_;
		while (idx < selectedSize) {
			QString val = QString::number((data.at((copyOffset + idx) / 2) & 0xF0) >> 4, 16);
			if ((idx + 1) < selectedSize) {
				val += QString::number((data.at((copyOffset + idx) / 2) & 0xF), 16);
				val += " ";
			}
			text += val;

			if ((idx/2) % BYTES_PER_LINE == (BYTES_PER_LINE - 1))
				text += "\n";

			idx += 2;
		}

		QClipboard *clipboard = QApplication::clipboard();
		clipboard->setText(text);
		if (clipboard->supportsSelection())
			clipboard->setText(text);
	}

	if (setVisible)
		ensureVisible();

	viewport()->update();
}

void QHexView::mouseMoveEvent(QMouseEvent *event)
{
	int actPos = cursorPosFromMousePos(event->pos());
	setCursorPos(actPos);
	setSelection(actPos);

	viewport()->update();
}

void QHexView::mousePressEvent(QMouseEvent *event)
{
	int cPos = cursorPosFromMousePos(event->pos());

	if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) && (event->button() == Qt::LeftButton))
		setSelection(cPos);
	else
		resetSelection(cPos);

	setCursorPos(cPos);

	viewport()->update();
}

size_t QHexView::cursorPosFromMousePos(const QPoint &position)
{
	int pos = -1;

	if (((size_t)position.x() >= posHex_) &&
		((size_t)position.x() < (posHex_ + HEXCHARS_IN_LINE * charWidth_))) {

		// Note: We add 1.5 character widths so that selection across
		// byte gaps is smoother
		int x = (position.x() + (1.5 * charWidth_ / 2) - posHex_) / charWidth_;

		// Note: We allow only full bytes to be selected, not nibbles,
		// so we round to the nearest byte gap
		x = (2 * x + 1) / 3;

		int firstLineIdx = verticalScrollBar()->value();
		int y = (position.y() / charHeight_) * 2 * BYTES_PER_LINE;
		pos = x + y + firstLineIdx * BYTES_PER_LINE * 2;
	}

	return pos;
}

void QHexView::resetSelection()
{
	selectBegin_ = selectInit_;
	selectEnd_ = selectInit_;
}

void QHexView::resetSelection(int pos)
{
	if (pos < 0)
		pos = 0;

	selectInit_ = pos;
	selectBegin_ = pos;
	selectEnd_ = pos;
}

void QHexView::setSelection(int pos)
{
	if (pos < 0)
		pos = 0;

	if ((size_t)pos >= selectInit_) {
		selectEnd_ = pos;
		selectBegin_ = selectInit_;
	} else {
		selectBegin_ = pos;
		selectEnd_ = selectInit_;
	}
}

void QHexView::setCursorPos(int position)
{
	if (position < 0)
		position = 0;

	int maxPos = 0;
	if (data_) {
		maxPos = data_->count() * 2;
		if (data_->count() % BYTES_PER_LINE)
			maxPos++;
	}

	if (position > maxPos)
		position = maxPos;

	cursorPos_ = position;
}

void QHexView::ensureVisible()
{
	QSize areaSize = viewport()->size();

	int firstLineIdx = verticalScrollBar() -> value();
	int lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;

	int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);

	if (cursorY < firstLineIdx)
		verticalScrollBar() -> setValue(cursorY);
	else if(cursorY >= lastLineIdx)
		verticalScrollBar() -> setValue(cursorY - areaSize.height() / charHeight_ + 1);
}
Commit	Line	Data
c7b76823 SA	1	/*
	2	* This file is part of the PulseView project.
	3	*
	4	* Copyright (C) 2015 Victor Anjin <virinext@gmail.com>
	5	* Copyright (C) 2019 Soeren Apel <soeren@apelpie.net>
	6	*
	7	* The MIT License (MIT)
	8	*
	9	* Copyright (c) 2015
	10	*
	11	* Permission is hereby granted, free of charge, to any person obtaining a copy
	12	* of this software and associated documentation files (the "Software"), to deal
	13	* in the Software without restriction, including without limitation the rights
	14	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	15	* copies of the Software, and to permit persons to whom the Software is
	16	* furnished to do so, subject to the following conditions:
	17	*
	18	* The above copyright notice and this permission notice shall be included in all
	19	* copies or substantial portions of the Software.
	20	*
	21	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	22	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	23	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	24	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	25	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	26	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	27	* SOFTWARE.
	28	*/
	29
	30	#include <QApplication>
	31	#include <QClipboard>
	32	#include <QFont>
	33	#include <QKeyEvent>
	34	#include <QScrollBar>
	35	#include <QSize>
	36	#include <QPainter>
	37	#include <QPaintEvent>
	38
	39	#include "QHexView.hpp"
	40
560f8377 SA	41	const unsigned int BYTES_PER_LINE = 16;
	42	const unsigned int HEXCHARS_IN_LINE = BYTES_PER_LINE * 3 - 1;
	43	const unsigned int GAP_ADR_HEX = 10;
	44	const unsigned int GAP_HEX_ASCII = 10;
	45	const unsigned int GAP_ASCII_SLIDER = 5;
c7b76823	46
c7b76823 SA	47
c7b76823 SA	48	QHexView::QHexView(QWidget *parent):
560f8377	49	QAbstractScrollArea(parent),
01ba5ed7	50	data_(nullptr)
c7b76823 SA	51	{
	52	setFont(QFont("Courier", 10));
	53
560f8377	54	charWidth_ = fontMetrics().boundingRect('X').width();
c7b76823 SA	55	charHeight_ = fontMetrics().height();
c7b76823 SA	56
560f8377 SA	57	// Determine X coordinates of the three sub-areas
	58	posAddr_ = 0;
	59	posHex_ = 10 * charWidth_ + GAP_ADR_HEX;
c7b76823 SA	60	posAscii_ = posHex_ + HEXCHARS_IN_LINE * charWidth_ + GAP_HEX_ASCII;
c7b76823 SA	61
c7b76823 SA	62	setFocusPolicy(Qt::StrongFocus);
	63	}
	64
01ba5ed7	65	void QHexView::setData(QByteArray *data)
c7b76823 SA	66	{
	67	verticalScrollBar()->setValue(0);
	68
01ba5ed7	69	data_ = data;
c7b76823 SA	70	cursorPos_ = 0;
	71	resetSelection(0);
	72	}
	73
	74	void QHexView::showFromOffset(size_t offset)
	75	{
01ba5ed7	76	if (data_ && (offset < (size_t)data_->count())) {
c7b76823 SA	77	setCursorPos(offset * 2);
	78
	79	int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
	80	verticalScrollBar() -> setValue(cursorY);
	81	}
4b97fe09 SA	82
4b97fe09 SA	83	viewport()->update();
c7b76823 SA	84	}
	85
	86	void QHexView::clear()
	87	{
	88	verticalScrollBar()->setValue(0);
01ba5ed7	89	data_ = nullptr;
4b97fe09 SA	90
4b97fe09 SA	91	viewport()->update();
c7b76823 SA	92	}
c7b76823 SA	93
560f8377	94	QSize QHexView::getFullSize() const
c7b76823	95	{
560f8377 SA	96	size_t width = posAscii_ + (BYTES_PER_LINE * charWidth_) +
	97	GAP_ASCII_SLIDER + verticalScrollBar()->width();
	98
01ba5ed7 SA	99	if (!data_)
01ba5ed7 SA	100	return QSize(width, 0);
560f8377	101
01ba5ed7 SA	102	size_t height = data_->count() / BYTES_PER_LINE;
	103
	104	if (data_->count() % BYTES_PER_LINE)
c7b76823 SA	105	height++;
	106
	107	height *= charHeight_;
	108
	109	return QSize(width, height);
	110	}
	111
	112	void QHexView::paintEvent(QPaintEvent *event)
	113	{
c7b76823 SA	114	QPainter painter(viewport());
c7b76823 SA	115
560f8377	116	// Calculate and update the widget and paint area sizes
560f8377 SA	117	QSize widgetSize = getFullSize();
	118	setMinimumWidth(widgetSize.width());
	119	setMaximumWidth(widgetSize.width());
01ba5ed7	120	QSize areaSize = viewport()->size();
560f8377	121
c7b76823 SA	122	verticalScrollBar()->setPageStep(areaSize.height() / charHeight_);
	123	verticalScrollBar()->setRange(0, (widgetSize.height() - areaSize.height()) / charHeight_ + 1);
	124
01ba5ed7 SA	125	// Fill widget background
	126	painter.fillRect(event->rect(), palette().color(QPalette::Base));
	127
4b97fe09	128	if (!data_ \|\| (data_->size() == 0)) {
01ba5ed7 SA	129	painter.setPen(palette().color(QPalette::Text));
	130	QString s = tr("No data available");
	131	int x = (areaSize.width() - fontMetrics().boundingRect(s).width()) / 2;
	132	int y = areaSize.height() / 2;
	133	painter.drawText(x, y, s);
	134	return;
	135	}
	136
	137	// Determine first/last line indices
c7b76823 SA	138	size_t firstLineIdx = verticalScrollBar()->value();
	139
	140	size_t lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;
01ba5ed7 SA	141	if (lastLineIdx > (data_->count() / BYTES_PER_LINE)) {
	142	lastLineIdx = data_->count() / BYTES_PER_LINE;
	143	if (data_->count() % BYTES_PER_LINE)
c7b76823 SA	144	lastLineIdx++;
	145	}
	146
01ba5ed7	147	// Fill address area background
c7b76823	148	painter.fillRect(QRect(posAddr_, event->rect().top(),
560f8377	149	posHex_ - (GAP_ADR_HEX / 2), height()), palette().color(QPalette::Window));
c7b76823	150
560f8377 SA	151	// Paint divider line between hex and ASCII areas
	152	int line_x = posAscii_ - (GAP_HEX_ASCII / 2);
	153	painter.setPen(palette().color(QPalette::Midlight));
	154	painter.drawLine(line_x, event->rect().top(), line_x, height());
c7b76823	155
560f8377 SA	156	// Paint address area
560f8377 SA	157	painter.setPen(palette().color(QPalette::ButtonText));
c7b76823	158
560f8377 SA	159	int yStart = charHeight_;
560f8377 SA	160	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
c7b76823	161
560f8377 SA	162	QString address = QString("%1").arg(lineIdx * 16, 10, 16, QChar('0')).toUpper();
	163	painter.drawText(posAddr_, y, address);
	164	y += charHeight_;
	165	}
c7b76823	166
560f8377 SA	167	// Paint hex values
	168	QBrush regular = painter.brush();
	169	QBrush selected = QBrush(palette().color(QPalette::Highlight));
01ba5ed7 SA	170	QByteArray data = data_->mid(firstLineIdx * BYTES_PER_LINE,
01ba5ed7 SA	171	(lastLineIdx - firstLineIdx) * BYTES_PER_LINE);
c7b76823	172
560f8377 SA	173	yStart = charHeight_;
	174	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
	175
	176	painter.setBackgroundMode(Qt::OpaqueMode);
c7b76823	177
560f8377	178	int x = posHex_;
c7b76823 SA	179	for (size_t i = 0; i < BYTES_PER_LINE && ((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) < (size_t)data.size(); i++) {
c7b76823 SA	180	size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
c7b76823	181
560f8377	182	if ((pos >= selectBegin_) && (pos < selectEnd_)) {
c7b76823	183	painter.setBackground(selected);
560f8377	184	painter.setPen(palette().color(QPalette::HighlightedText));
c7b76823	185	} else {
560f8377 SA	186	painter.setBackground(regular);
560f8377 SA	187	painter.setPen(palette().color(QPalette::Text));
c7b76823 SA	188	}
c7b76823 SA	189
560f8377 SA	190	// First nibble
	191	QString val = QString::number((data.at((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) & 0xF0) >> 4, 16).toUpper();
	192	painter.drawText(x, y, val);
c7b76823	193
560f8377 SA	194	// Second nibble
	195	val = QString::number((data.at((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) & 0xF), 16).toUpper();
	196	painter.drawText(x + charWidth_, y, val);
c7b76823	197
560f8377	198	x += 3 * charWidth_;
c7b76823 SA	199	}
c7b76823 SA	200
560f8377 SA	201	y += charHeight_;
	202	}
	203
	204	// Paint ASCII characters
	205	yStart = charHeight_;
	206	for (size_t lineIdx = firstLineIdx, y = yStart; lineIdx < lastLineIdx; lineIdx++) {
	207
	208	int x = posAscii_;
c7b76823 SA	209	for (size_t i = 0; ((lineIdx - firstLineIdx) * BYTES_PER_LINE + i) < (size_t)data.size() && (i < BYTES_PER_LINE); i++) {
	210	char ch = data[(unsigned int)((lineIdx - firstLineIdx) * BYTES_PER_LINE + i)];
	211
560f8377	212	if ((ch < 0x20) \|\| (ch > 0x7E))
c7b76823 SA	213	ch = '.';
c7b76823 SA	214
560f8377 SA	215	size_t pos = (lineIdx * BYTES_PER_LINE + i) * 2;
	216	if ((pos >= selectBegin_) && (pos < selectEnd_)) {
	217	painter.setBackground(selected);
	218	painter.setPen(palette().color(QPalette::HighlightedText));
	219	} else {
	220	painter.setBackground(regular);
	221	painter.setPen(palette().color(QPalette::Text));
	222	}
	223
	224	painter.drawText(x, y, QString(ch));
	225	x += charWidth_;
c7b76823 SA	226	}
c7b76823 SA	227
560f8377	228	y += charHeight_;
c7b76823 SA	229	}
c7b76823 SA	230
560f8377	231	// Paint cursor
c7b76823 SA	232	if (hasFocus()) {
	233	int x = (cursorPos_ % (2 * BYTES_PER_LINE));
	234	int y = cursorPos_ / (2 * BYTES_PER_LINE);
	235	y -= firstLineIdx;
	236	int cursorX = (((x / 2) * 3) + (x % 2)) * charWidth_ + posHex_;
	237	int cursorY = y * charHeight_ + 4;
560f8377	238	painter.fillRect(cursorX, cursorY, 2, charHeight_, palette().color(QPalette::WindowText));
c7b76823 SA	239	}
	240	}
	241
	242	void QHexView::keyPressEvent(QKeyEvent *event)
	243	{
	244	bool setVisible = false;
	245
560f8377	246	// Cursor movements
c7b76823 SA	247	if (event->matches(QKeySequence::MoveToNextChar)) {
	248	setCursorPos(cursorPos_ + 1);
	249	resetSelection(cursorPos_);
	250	setVisible = true;
	251	}
	252	if (event->matches(QKeySequence::MoveToPreviousChar)) {
	253	setCursorPos(cursorPos_ - 1);
	254	resetSelection(cursorPos_);
	255	setVisible = true;
	256	}
	257
	258	if (event->matches(QKeySequence::MoveToEndOfLine)) {
	259	setCursorPos(cursorPos_ \| ((BYTES_PER_LINE * 2) - 1));
	260	resetSelection(cursorPos_);
	261	setVisible = true;
	262	}
	263	if (event->matches(QKeySequence::MoveToStartOfLine)) {
	264	setCursorPos(cursorPos_ \| (cursorPos_ % (BYTES_PER_LINE * 2)));
	265	resetSelection(cursorPos_);
	266	setVisible = true;
	267	}
	268	if (event->matches(QKeySequence::MoveToPreviousLine)) {
	269	setCursorPos(cursorPos_ - BYTES_PER_LINE * 2);
	270	resetSelection(cursorPos_);
	271	setVisible = true;
	272	}
	273	if (event->matches(QKeySequence::MoveToNextLine)) {
	274	setCursorPos(cursorPos_ + BYTES_PER_LINE * 2);
	275	resetSelection(cursorPos_);
	276	setVisible = true;
	277	}
	278
	279	if (event->matches(QKeySequence::MoveToNextPage)) {
	280	setCursorPos(cursorPos_ + (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
	281	resetSelection(cursorPos_);
	282	setVisible = true;
	283	}
	284	if (event->matches(QKeySequence::MoveToPreviousPage)) {
	285	setCursorPos(cursorPos_ - (viewport()->height() / charHeight_ - 1) * 2 * BYTES_PER_LINE);
	286	resetSelection(cursorPos_);
	287	setVisible = true;
	288	}
	289	if (event->matches(QKeySequence::MoveToEndOfDocument)) {
01ba5ed7 SA	290	if (data_)
01ba5ed7 SA	291	setCursorPos(data_->count() * 2);
c7b76823 SA	292	resetSelection(cursorPos_);
	293	setVisible = true;
	294	}
	295	if (event->matches(QKeySequence::MoveToStartOfDocument)) {
	296	setCursorPos(0);
	297	resetSelection(cursorPos_);
	298	setVisible = true;
	299	}
	300
560f8377	301	// Select commands
c7b76823 SA	302	if (event->matches(QKeySequence::SelectAll)) {
c7b76823 SA	303	resetSelection(0);
01ba5ed7 SA	304	if (data_)
01ba5ed7 SA	305	setSelection(2 * data_->count() + 1);
c7b76823 SA	306	setVisible = true;
	307	}
	308	if (event->matches(QKeySequence::SelectNextChar)) {
	309	int pos = cursorPos_ + 1;
	310	setCursorPos(pos);
	311	setSelection(pos);
	312	setVisible = true;
	313	}
	314	if (event->matches(QKeySequence::SelectPreviousChar)) {
	315	int pos = cursorPos_ - 1;
	316	setSelection(pos);
	317	setCursorPos(pos);
	318	setVisible = true;
	319	}
	320	if (event->matches(QKeySequence::SelectEndOfLine)) {
	321	int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE)) + (2 * BYTES_PER_LINE);
	322	setCursorPos(pos);
	323	setSelection(pos);
	324	setVisible = true;
	325	}
	326	if (event->matches(QKeySequence::SelectStartOfLine)) {
	327	int pos = cursorPos_ - (cursorPos_ % (2 * BYTES_PER_LINE));
	328	setCursorPos(pos);
	329	setSelection(pos);
	330	setVisible = true;
	331	}
	332	if (event->matches(QKeySequence::SelectPreviousLine)) {
	333	int pos = cursorPos_ - (2 * BYTES_PER_LINE);
	334	setCursorPos(pos);
	335	setSelection(pos);
	336	setVisible = true;
	337	}
	338	if (event->matches(QKeySequence::SelectNextLine)) {
	339	int pos = cursorPos_ + (2 * BYTES_PER_LINE);
	340	setCursorPos(pos);
	341	setSelection(pos);
	342	setVisible = true;
	343	}
	344
	345	if (event->matches(QKeySequence::SelectNextPage)) {
	346	int pos = cursorPos_ + (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
	347	setCursorPos(pos);
	348	setSelection(pos);
	349	setVisible = true;
	350	}
	351	if (event->matches(QKeySequence::SelectPreviousPage)) {
	352	int pos = cursorPos_ - (((viewport()->height() / charHeight_) - 1) * 2 * BYTES_PER_LINE);
	353	setCursorPos(pos);
	354	setSelection(pos);
	355	setVisible = true;
	356	}
	357	if (event->matches(QKeySequence::SelectEndOfDocument)) {
	358	int pos = 0;
01ba5ed7 SA	359	if (data_)
01ba5ed7 SA	360	pos = data_->count() * 2;
c7b76823 SA	361	setCursorPos(pos);
	362	setSelection(pos);
	363	setVisible = true;
	364	}
	365	if (event->matches(QKeySequence::SelectStartOfDocument)) {
	366	int pos = 0;
	367	setCursorPos(pos);
	368	setSelection(pos);
	369	setVisible = true;
	370	}
	371
01ba5ed7	372	if (event->matches(QKeySequence::Copy) && (data_)) {
c7b76823 SA	373	QString text;
	374	int idx = 0;
	375	int copyOffset = 0;
	376
01ba5ed7	377	QByteArray data = data_->mid(selectBegin_ / 2, (selectEnd_ - selectBegin_) / 2 + 1);
c7b76823 SA	378	if (selectBegin_ % 2) {
	379	text += QString::number((data.at((idx+1) / 2) & 0xF), 16);
	380	text += " ";
	381	idx++;
	382	copyOffset = 1;
	383	}
	384
	385	int selectedSize = selectEnd_ - selectBegin_;
	386	while (idx < selectedSize) {
	387	QString val = QString::number((data.at((copyOffset + idx) / 2) & 0xF0) >> 4, 16);
	388	if ((idx + 1) < selectedSize) {
	389	val += QString::number((data.at((copyOffset + idx) / 2) & 0xF), 16);
	390	val += " ";
	391	}
	392	text += val;
	393
	394	if ((idx/2) % BYTES_PER_LINE == (BYTES_PER_LINE - 1))
	395	text += "\n";
	396
	397	idx += 2;
	398	}
	399
	400	QClipboard *clipboard = QApplication::clipboard();
	401	clipboard->setText(text);
	402	if (clipboard->supportsSelection())
	403	clipboard->setText(text);
	404	}
	405
	406	if (setVisible)
	407	ensureVisible();
	408
	409	viewport()->update();
	410	}
	411
	412	void QHexView::mouseMoveEvent(QMouseEvent *event)
	413	{
560f8377	414	int actPos = cursorPosFromMousePos(event->pos());
c7b76823 SA	415	setCursorPos(actPos);
	416	setSelection(actPos);
	417
	418	viewport()->update();
	419	}
	420
	421	void QHexView::mousePressEvent(QMouseEvent *event)
	422	{
560f8377	423	int cPos = cursorPosFromMousePos(event->pos());
c7b76823 SA	424
	425	if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) && (event->button() == Qt::LeftButton))
	426	setSelection(cPos);
	427	else
	428	resetSelection(cPos);
	429
	430	setCursorPos(cPos);
	431
	432	viewport()->update();
	433	}
	434
560f8377	435	size_t QHexView::cursorPosFromMousePos(const QPoint &position)
c7b76823 SA	436	{
	437	int pos = -1;
	438
	439	if (((size_t)position.x() >= posHex_) &&
	440	((size_t)position.x() < (posHex_ + HEXCHARS_IN_LINE * charWidth_))) {
	441
560f8377 SA	442	// Note: We add 1.5 character widths so that selection across
	443	// byte gaps is smoother
	444	int x = (position.x() + (1.5 * charWidth_ / 2) - posHex_) / charWidth_;
c7b76823	445
560f8377 SA	446	// Note: We allow only full bytes to be selected, not nibbles,
	447	// so we round to the nearest byte gap
	448	x = (2 * x + 1) / 3;
c7b76823 SA	449
	450	int firstLineIdx = verticalScrollBar()->value();
	451	int y = (position.y() / charHeight_) * 2 * BYTES_PER_LINE;
	452	pos = x + y + firstLineIdx * BYTES_PER_LINE * 2;
	453	}
	454
	455	return pos;
	456	}
	457
	458	void QHexView::resetSelection()
	459	{
	460	selectBegin_ = selectInit_;
	461	selectEnd_ = selectInit_;
	462	}
	463
	464	void QHexView::resetSelection(int pos)
	465	{
	466	if (pos < 0)
	467	pos = 0;
	468
	469	selectInit_ = pos;
	470	selectBegin_ = pos;
	471	selectEnd_ = pos;
	472	}
	473
	474	void QHexView::setSelection(int pos)
	475	{
	476	if (pos < 0)
	477	pos = 0;
	478
	479	if ((size_t)pos >= selectInit_) {
	480	selectEnd_ = pos;
	481	selectBegin_ = selectInit_;
	482	} else {
	483	selectBegin_ = pos;
	484	selectEnd_ = selectInit_;
	485	}
	486	}
	487
	488	void QHexView::setCursorPos(int position)
	489	{
	490	if (position < 0)
	491	position = 0;
	492
	493	int maxPos = 0;
01ba5ed7 SA	494	if (data_) {
	495	maxPos = data_->count() * 2;
	496	if (data_->count() % BYTES_PER_LINE)
c7b76823 SA	497	maxPos++;
	498	}
	499
	500	if (position > maxPos)
	501	position = maxPos;
	502
	503	cursorPos_ = position;
	504	}
	505
	506	void QHexView::ensureVisible()
	507	{
	508	QSize areaSize = viewport()->size();
	509
	510	int firstLineIdx = verticalScrollBar() -> value();
	511	int lastLineIdx = firstLineIdx + areaSize.height() / charHeight_;
	512
	513	int cursorY = cursorPos_ / (2 * BYTES_PER_LINE);
	514
	515	if (cursorY < firstLineIdx)
	516	verticalScrollBar() -> setValue(cursorY);
	517	else if(cursorY >= lastLineIdx)
	518	verticalScrollBar() -> setValue(cursorY - areaSize.height() / charHeight_ + 1);
	519	}