Mercurial > hg > easyhg
view src/panned.cpp @ 425:ad106f5fe75f
Add "Ignore Files" and "Edit Ignored List" to Work menu (latter is subsumed from Advanced menu formerly). Also subsume Serve via HTTP into File menu as Share Repository, and add a more helpful description of it. Remove Advanced menu
author | Chris Cannam |
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date | Thu, 23 Jun 2011 10:58:32 +0100 |
parents | 44cef6368690 |
children | 533519ebc0cb |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* EasyMercurial Based on HgExplorer by Jari Korhonen Copyright (c) 2010 Jari Korhonen Copyright (c) 2011 Chris Cannam Copyright (c) 2011 Queen Mary, University of London 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) any later version. See the file COPYING included with this distribution for more information. */ #include "panned.h" #include "debug.h" #include <QScrollBar> #include <QWheelEvent> #include <QTimer> #include <cmath> #include <iostream> Panned::Panned() : m_dragging(false) { m_dragTimer = new QTimer(this); m_dragTimerMs = 50; connect(m_dragTimer, SIGNAL(timeout()), this, SLOT(dragTimerTimeout())); setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing); } void Panned::resizeEvent(QResizeEvent *ev) { DEBUG << "Panned::resizeEvent()" << endl; QPointF nearpt = mapToScene(0, 0); QPointF farpt = mapToScene(width(), height()); QSizeF sz(farpt.x()-nearpt.x(), farpt.y()-nearpt.y()); QRectF pr(nearpt, sz); QGraphicsView::resizeEvent(ev); if (pr != m_pannedRect) { DEBUG << "Panned: setting panned rect to " << pr << endl; m_pannedRect = pr; centerOn(pr.center()); emit pannedRectChanged(pr); } } void Panned::setScene(QGraphicsScene *s) { if (!scene()) { QGraphicsView::setScene(s); return; } QPointF nearpt = mapToScene(0, 0); QPointF farpt = mapToScene(width(), height()); QSizeF sz(farpt.x()-nearpt.x(), farpt.y()-nearpt.y()); QRectF pr(nearpt, sz); QGraphicsView::setScene(s); DEBUG << "Panned::setScene: pr = " << pr << ", sceneRect = " << sceneRect() << endl; if (scene() && sceneRect().intersects(pr)) { DEBUG << "Panned::setScene: restoring old rect " << pr << endl; m_pannedRect = pr; centerOn(pr.center()); emit pannedRectChanged(pr); } } void Panned::paintEvent(QPaintEvent *e) { QGraphicsView::paintEvent(e); } void Panned::drawForeground(QPainter *paint, const QRectF &) { QPointF nearpt = mapToScene(0, 0); QPointF farpt = mapToScene(width(), height()); QSizeF sz(farpt.x()-nearpt.x(), farpt.y()-nearpt.y()); QRectF pr(nearpt, sz); if (pr != m_pannedRect) { DEBUG << "Panned::drawForeground: visible rect " << pr << " differs from panned rect " << m_pannedRect << ", updating panned rect" <<endl; if (pr.x() != m_pannedRect.x()) emit pannedContentsScrolled(); m_pannedRect = pr; emit pannedRectChanged(pr); } } void Panned::zoomIn() { QMatrix m = matrix(); m.scale(1.0 / 1.1, 1.0 / 1.1); setMatrix(m); } void Panned::zoomOut() { QMatrix m = matrix(); m.scale(1.1, 1.1); setMatrix(m); } void Panned::slotSetPannedRect(QRectF pr) { centerOn(pr.center()); // setSceneRect(pr); // m_pannedRect = pr; } void Panned::wheelEvent(QWheelEvent *ev) { if (ev->modifiers() & Qt::ControlModifier) { int d = ev->delta(); if (d > 0) { while (d > 0) { zoomOut(); d -= 120; } } else { while (d < 0) { zoomIn(); d += 120; } } } else { emit wheelEventReceived(ev); QGraphicsView::wheelEvent(ev); } } void Panned::slotEmulateWheelEvent(QWheelEvent *ev) { QGraphicsView::wheelEvent(ev); } void Panned::mousePressEvent(QMouseEvent *ev) { if (dragMode() != QGraphicsView::ScrollHandDrag || ev->button() != Qt::LeftButton) { QGraphicsView::mousePressEvent(ev); return; } DEBUG << "Panned::mousePressEvent: have left button in drag mode" << endl; setDragMode(QGraphicsView::NoDrag); QGraphicsView::mousePressEvent(ev); setDragMode(QGraphicsView::ScrollHandDrag); if (!ev->isAccepted()) { ev->accept(); m_dragging = true; m_lastDragPos = ev->pos(); m_lastDragStart = ev->pos(); m_lastOrigin = QPoint(horizontalScrollBar()->value(), verticalScrollBar()->value()); m_velocity = QPointF(0, 0); m_dragTimer->start(m_dragTimerMs); m_dragDirection = UnknownDrag; } } void Panned::updateDragDirection(QPoint pos) { if (m_dragDirection == FreeDrag) { return; } QPoint overall = pos - m_lastDragStart; int smallThreshold = 10; int largeThreshold = 30; int dx = qAbs(overall.x()); int dy = qAbs(overall.y()); switch (m_dragDirection) { case UnknownDrag: if (dx > smallThreshold) { if (dy > smallThreshold) { m_dragDirection = FreeDrag; } else { m_dragDirection = HorizontalDrag; } } else if (dy > smallThreshold) { m_dragDirection = VerticalDrag; } break; case HorizontalDrag: if (dy > largeThreshold) { m_dragDirection = FreeDrag; } break; case VerticalDrag: if (dx > largeThreshold) { m_dragDirection = FreeDrag; } break; }; } void Panned::mouseMoveEvent(QMouseEvent *ev) { if (!m_dragging) { QGraphicsView::mouseMoveEvent(ev); return; } DEBUG << "Panned::mouseMoveEvent: dragging" << endl; ev->accept(); updateDragDirection(ev->pos()); QScrollBar *hBar = horizontalScrollBar(); QScrollBar *vBar = verticalScrollBar(); QPoint delta = ev->pos() - m_lastDragPos; if (m_dragDirection != VerticalDrag) { hBar->setValue(hBar->value() + (isRightToLeft() ? delta.x() : -delta.x())); } if (m_dragDirection != HorizontalDrag) { vBar->setValue(vBar->value() - delta.y()); } m_lastDragPos = ev->pos(); } void Panned::mouseReleaseEvent(QMouseEvent *ev) { if (!m_dragging) { QGraphicsView::mouseReleaseEvent(ev); return; } DEBUG << "Panned::mouseReleaseEvent: dragging" << endl; ev->accept(); m_dragging = false; } void Panned::dragTimerTimeout() { QPoint origin = QPoint(horizontalScrollBar()->value(), verticalScrollBar()->value()); if (m_dragging) { m_velocity = QPointF (float(origin.x() - m_lastOrigin.x()) / m_dragTimerMs, float(origin.y() - m_lastOrigin.y()) / m_dragTimerMs); m_lastOrigin = origin; DEBUG << "Panned::dragTimerTimeout: velocity = " << m_velocity << endl; } else { if (origin == m_lastOrigin) { m_dragTimer->stop(); } float x = m_velocity.x(), y = m_velocity.y(); if (fabsf(x) > 1.0/m_dragTimerMs) x = x * 0.9f; else x = 0.f; if (fabsf(y) > 1.0/m_dragTimerMs) y = y * 0.9f; else y = 0.f; m_velocity = QPointF(x, y); DEBUG << "Panned::dragTimerTimeout: velocity adjusted to " << m_velocity << endl; m_lastOrigin = origin; //!!! need to store origin in floats if (m_dragDirection != VerticalDrag) { horizontalScrollBar()->setValue(m_lastOrigin.x() + m_velocity.x() * m_dragTimerMs); } if (m_dragDirection != HorizontalDrag) { verticalScrollBar()->setValue(m_lastOrigin.y() + m_velocity.y() * m_dragTimerMs); } } } void Panned::leaveEvent(QEvent *) { emit mouseLeaves(); }