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/*
* Copyright (c) 2014-2016 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swift/QtUI/Trellis/QtGridSelectionDialog.h>
#include <QApplication>
#include <QCursor>
#include <QPaintEvent>
#include <QPainter>
#include <QStyle>
#include <QStyleOption>
namespace Swift {
QtGridSelectionDialog::QtGridSelectionDialog(QWidget* parent) : QWidget(parent), descriptionText(tr("Select the number of rows and columns for your layout. You can change the size by moving the mouse or cursor keys.")) {
frameSize = QSize(28,28) * 2;
maxGridSize = QSize(7,7);
minGridSize = QSize(1,1);
currentGridSize = QSize(1,1);
padding = 4;
setWindowFlags(Qt::FramelessWindowHint);
setCursor(Qt::SizeAllCursor);
horizontalMargin = style()->pixelMetric(QStyle::PM_LayoutLeftMargin);
verticalMargin = style()->pixelMetric(QStyle::PM_LayoutBottomMargin);
}
QSize QtGridSelectionDialog::sizeHint() const {
// PM_MenuVMargin | frameSize | ( padding | frameSize ) * | PM_MenuVMargin
int width = horizontalMargin + frameSize.width() + (padding + frameSize.width()) * (currentGridSize.width() - 1) + horizontalMargin;
int height = verticalMargin + frameSize.height() + (padding + frameSize.height()) * (currentGridSize.height() - 1) + verticalMargin;
// Add space for descriptive centered text below.
auto fontMetrics = QFontMetrics(QApplication::font());
auto descriptionBB = fontMetrics.boundingRect(QRect(0,0,width - 2*horizontalMargin,1000), Qt::TextWordWrap, descriptionText, 0, 0);
height += descriptionBB.height() + descriptionBB.y();
return QSize(width, height);
}
void QtGridSelectionDialog::setCurrentGridSize(const QSize& size) {
currentGridSize = size;
emit currentGridSizeChanged(size);
}
QSize QtGridSelectionDialog::getCurrentGridSize() const {
return currentGridSize;
}
void QtGridSelectionDialog::setMinGridSize(const QSize& size) {
minGridSize = size;
emit minGridSizeChanged(size);
}
QSize QtGridSelectionDialog::getMinGridSize() const {
return minGridSize;
}
void QtGridSelectionDialog::setMaxGridSize(const QSize& size) {
maxGridSize = size;
emit maxGridSizeChanged(size);
}
QSize QtGridSelectionDialog::getMaxGridSize() const {
return maxGridSize;
}
void QtGridSelectionDialog::keyReleaseEvent(QKeyEvent* event) {
if (event) {
QSize newGridSize = currentGridSize;
if (event->key() == Qt::Key_Up) {
newGridSize += QSize(0, -1);
}
else if (event->key() == Qt::Key_Down) {
newGridSize += QSize(0, 1);
}
else if (event->key() == Qt::Key_Left) {
newGridSize += QSize(-1, 0);
}
else if (event->key() == Qt::Key_Right) {
newGridSize += QSize(1, 0);
}
else if (event->key() == Qt::Key_Return) {
hide();
setCurrentGridSize(currentGridSize);
}
if (minGridSize.expandedTo(newGridSize).boundedTo(maxGridSize) != currentGridSize) {
currentGridSize = minGridSize.expandedTo(newGridSize).boundedTo(maxGridSize);
QSize newSizeHint = sizeHint();
resize(newSizeHint);
QCursor::setPos(mapToGlobal(QPoint(newSizeHint.width(), newSizeHint.height()) - QPoint(frameSize.width() / 2, frameSize.height() / 2)));
}
}
}
void QtGridSelectionDialog::mousePressEvent(QMouseEvent*) {
hide();
setCurrentGridSize(currentGridSize);
}
void QtGridSelectionDialog::paintEvent(QPaintEvent*) {
QPainter painter(this);
// draw grid
QRect gridCell = QRect(QPoint(0,0), frameSize);
painter.setBrush(palette().highlight());
painter.setPen(Qt::NoPen);
for (int x = 0; x < currentGridSize.width(); x++) {
for (int y = 0; y < currentGridSize.height(); y++) {
int xPos = horizontalMargin + (x * (frameSize.width() + padding));
int yPos = verticalMargin + (y * (frameSize.height() + padding));
gridCell.moveTo(QPoint(xPos, yPos));
painter.drawRect(gridCell);
}
}
// draw description text
auto fontMetrics = QFontMetrics(QApplication::font());
auto descriptionBB = fontMetrics.boundingRect(QRect(0,0, width() - 2 * horizontalMargin,0), Qt::AlignHCenter | Qt::AlignTop | Qt::TextWordWrap, descriptionText, 0, 0);
QStyleOption opt;
opt.initFrom(this);
int textY = verticalMargin + (currentGridSize.height() * (frameSize.height() + padding));
int textX = (size().width() - descriptionBB.width()) / 2;
style()->drawItemText(&painter, QRect(textX, textY, descriptionBB.width(), descriptionBB.height()), Qt::AlignHCenter | Qt::AlignTop | Qt::TextWordWrap, opt.palette, true, descriptionText, foregroundRole());
}
void QtGridSelectionDialog::showEvent(QShowEvent*) {
int xPos = horizontalMargin + frameSize.width() + (padding + frameSize.width()) * (currentGridSize.width() - 1) - frameSize.width()/2;
int yPos = verticalMargin + frameSize.height() + (padding + frameSize.height()) * (currentGridSize.height() - 1) - frameSize.height()/2;
QCursor::setPos(mapToGlobal(QPoint(xPos, yPos)));
setMouseTracking(true);
}
void QtGridSelectionDialog::hideEvent(QHideEvent*) {
setMouseTracking(false);
}
void QtGridSelectionDialog::mouseMoveEvent(QMouseEvent*) {
QPoint diff = (frameGeometry().bottomRight() - QCursor::pos());
QSize newDimensions = currentGridSize;
if (diff.x() > frameSize.width() * 1.5) {
newDimensions -= QSize(diff.x() / (frameSize.width() * 1.5), 0);
}
if (diff.y() > frameSize.height() * 1.5) {
newDimensions -= QSize(0, diff.y() / (frameSize.height() * 1.5));
}
if (minGridSize.expandedTo(newDimensions).boundedTo(maxGridSize) != currentGridSize) {
currentGridSize = minGridSize.expandedTo(newDimensions).boundedTo(maxGridSize);
resize(sizeHint());
}
}
void QtGridSelectionDialog::leaveEvent(QEvent *) {
QPoint diff = (frameGeometry().bottomRight() - QCursor::pos());
QSize newGridSize = currentGridSize;
if (diff.x() < 0) {
newGridSize += QSize(1,0);
}
if (diff.y() < 0) {
newGridSize += QSize(0,1);
}
if (minGridSize.expandedTo(newGridSize).boundedTo(maxGridSize) != currentGridSize) {
currentGridSize = minGridSize.expandedTo(newGridSize).boundedTo(maxGridSize);
resize(sizeHint());
}
}
bool QtGridSelectionDialog::event(QEvent* event) {
// Hide the window when it becomes a non-top-level window.
if (event->type() == QEvent::WindowDeactivate) {
hide();
return true;
}
return QWidget::event(event);
}
}
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Swift