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Diffstat (limited to 'test/radialmap/radialMap/widgetEvents.cpp')
| -rw-r--r-- | test/radialmap/radialMap/widgetEvents.cpp | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/test/radialmap/radialMap/widgetEvents.cpp b/test/radialmap/radialMap/widgetEvents.cpp new file mode 100644 index 0000000..0dd980d --- /dev/null +++ b/test/radialmap/radialMap/widgetEvents.cpp @@ -0,0 +1,212 @@ +/*********************************************************************** +* Copyright 2003-2004 Max Howell <max.howell@methylblue.com> +* Copyright 2008-2009 Martin Sandsmark <martin.sandsmark@kde.org> +* +* This program is free software; you can redistribute it and/or +* modify it under the terms of the GNU General Public License as +* published by the Free Software Foundation; either version 2 of +* the License or (at your option) version 3 or any later version +* accepted by the membership of KDE e.V. (or its successor approved +* by the membership of KDE e.V.), which shall act as a proxy +* defined in Section 14 of version 3 of the license. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with this program. If not, see <http://www.gnu.org/licenses/>. +***********************************************************************/ + +#include "fileTree.h" +#include "Config.h" +#include "radialMap.h" //class Segment +#include "widget.h" + +#include <QMenu> //::mousePressEvent() +#include <QUrl> + +#include <QApplication> //QApplication::setOverrideCursor() +#include <QClipboard> +#include <QPainter> +#include <QTimer> //::resizeEvent() +#include <QDropEvent> +#include <QPaintEvent> +#include <QResizeEvent> +#include <QMouseEvent> +#include <QDragEnterEvent> +#include <QToolTip> +#include <QMimeData> + +#include <cmath> //::segmentAt() + +void RadialMap::Widget::resizeEvent(QResizeEvent*) +{ + if (m_map.resize(rect())) + m_timer.setSingleShot(true); + m_timer.start(500); //will cause signature to rebuild for new size + + //always do these as they need to be initialised on creation + m_offset.rx() = (width() - m_map.width()) / 2; + m_offset.ry() = (height() - m_map.height()) / 2; +} + +void RadialMap::Widget::paintEvent(QPaintEvent*) +{ + QPainter paint; + paint.begin(this); + + if (!m_map.isNull()) + paint.drawPixmap(m_offset, m_map.pixmap()); + else + { + paint.drawText(rect(), 0, tr("We messed up, the user needs to initiate a rescan.")); + return; + } + + //exploded labels + if (!m_map.isNull() && !m_timer.isActive()) + { + if (Config::antialias) { + paint.setRenderHint(QPainter::Antialiasing); + //make lines appear on pixel boundaries + paint.translate(0.5, 0.5); + } + paintExplodedLabels(paint); + } +} + +const RadialMap::Segment* RadialMap::Widget::segmentAt(QPoint &e) const +{ + //determine which segment QPoint e is above + + e -= m_offset; + + if (!m_map.m_signature) + return nullptr; + + if (e.x() <= m_map.width() && e.y() <= m_map.height()) + { + //transform to cartesian coords + e.rx() -= m_map.width() / 2; //should be an int + e.ry() = m_map.height() / 2 - e.y(); + + double length = hypot(e.x(), e.y()); + + if (length >= m_map.m_innerRadius) //not hovering over inner circle + { + uint depth = ((int)length - m_map.m_innerRadius) / m_map.m_ringBreadth; + + if (depth <= m_map.m_visibleDepth) //**** do earlier since you can //** check not outside of range + { + //vector calculation, reduces to simple trigonometry + //cos angle = (aibi + ajbj) / albl + //ai = x, bi=1, aj=y, bj=0 + //cos angle = x / (length) + + uint a = (uint)(acos((double)e.x() / length) * 916.736); //916.7324722 = #radians in circle * 16 + + //acos only understands 0-180 degrees + if (e.y() < 0) a = 5760 - a; + + for (Segment *segment : m_map.m_signature[depth]) { + if (segment->intersects(a)) + return segment; + } + } + } + else return m_rootSegment; //hovering over inner circle + } + + return nullptr; +} + +void RadialMap::Widget::mouseMoveEvent(QMouseEvent *e) +{ + //set m_focus to what we hover over, update UI if it's a new segment + + Segment const * const oldFocus = m_focus; + QPoint p = e->pos(); + + m_focus = segmentAt(p); //NOTE p is passed by non-const reference + + if (m_focus) + { + m_tooltip.move(e->globalX() + 20, e->globalY() + 20); + if (m_focus != oldFocus) //if not same as last time + { + setCursor(Qt::PointingHandCursor); + + QString string; + + + string = QObject::tr("Tooltip of file/folder, %1 is path, %2 is size") + .arg(m_focus->file()->displayPath()) + .arg(m_focus->file()->humanReadableSize()); + + if (m_focus->file()->isFolder()) { + int files = static_cast<const Folder*>(m_focus->file())->children(); + const uint percent = uint((100 * files) / (double)m_tree->children()); + + string += QLatin1Char('\n'); + if (percent > 0) { + string += QObject::tr("Tooltip of folder, %1 File (%2%)") + .arg(files).arg(percent); + } else { + string += QObject::tr("Tooltip of folder, %1 File") + .arg(files); + } + } + + + // Calculate a semi-sane size for the tooltip + QFontMetrics fontMetrics(font()); + int tooltipWidth = 0; + int tooltipHeight = 0; + for (const QString &part : string.split(QLatin1Char('\n'))) { + tooltipHeight += fontMetrics.height(); + tooltipWidth = qMax(tooltipWidth, fontMetrics.width(part)); + } + // Limit it to the window size, probably should find something better + tooltipWidth = qMin(tooltipWidth, window()->width()); + tooltipWidth += 10; + tooltipHeight += 10; + m_tooltip.resize(tooltipWidth, tooltipHeight); + m_tooltip.setText(string); + m_tooltip.show(); + + emit mouseHover(m_focus->file()->displayPath()); + update(); + } + } + else if (oldFocus && oldFocus->file() != m_tree) + { + m_tooltip.hide(); + unsetCursor(); + update(); + + emit mouseHover(QString()); + } +} + +void RadialMap::Widget::enterEvent(QEvent *) +{ + if (!m_focus) return; + + setCursor(Qt::PointingHandCursor); + emit mouseHover(m_focus->file()->displayPath()); + update(); +} + +void RadialMap::Widget::leaveEvent(QEvent *) +{ + m_tooltip.hide(); +} + +void RadialMap::Widget::changeEvent(QEvent *e) +{ + if (e->type() == QEvent::ApplicationPaletteChange || + e->type() == QEvent::PaletteChange) + m_map.paint(); +} |