view src/changesetview.cpp @ 571:012ba1b83328

Show cancel button with progress bar only when running an operation that it makes sense to cancel (we don't really want people cancelling e.g. initial folder scan because it would leave things in an inconsistent state)

/* -*- 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) 2012 Chris Cannam
    Copyright (c) 2012 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 "changesetview.h"
#include "changesetscene.h"
#include "colourset.h"
#include "debug.h"

#include <QScrollBar>

ChangesetView::ChangesetView() :
    Panned()
{
    connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
	    this, SLOT(horizontalScrollHappened()));
}

void
ChangesetView::horizontalScrollHappened()
{
    DEBUG << "ChangesetView::horizontalScrollHappened" << endl;
    invalidateScene(rect(), QGraphicsScene::BackgroundLayer);
    viewport()->update();
}

void
ChangesetView::drawBackground(QPainter *paint, const QRectF &rect)
{
    DEBUG << "ChangesetView::drawBackground" << endl;

    ChangesetScene *cs = qobject_cast<ChangesetScene *>(scene());

    if (!cs) {
	QGraphicsView::drawBackground(paint, rect);
	return;
    }

    DEBUG << "ChangesetView::drawBackground: have scene" << endl;

    ChangesetScene::DateRanges ranges = cs->getDateRanges();

    paint->setClipRect(rect);

    DEBUG << "clip rect is " << rect << endl;

    paint->save();
    QFont f(paint->font());
    f.setBold(true);
    paint->setFont(f);

    float x = mapToScene(0, 0).x();
    float w = mapToScene(width(), 0).x() - x;
    float px = mapToScene(5, 0).x();

    QBrush oddBrush(QColor::fromRgb(250, 250, 250));
    QBrush evenBrush(QColor::fromRgb(240, 240, 240));

    //!!! todo: select only the ranges actually within range!
    
    for (ChangesetScene::DateRanges::const_iterator i = ranges.begin();
         i != ranges.end(); ++i) {

	ChangesetScene::DateRange range = i.value();

        QRectF r = QRectF(x, range.minrow * 90 - 25,
			  w, range.nrows * 90).normalized();

	paint->fillRect(r, range.even ? evenBrush : oddBrush);
        paint->drawText(px, range.minrow * 90 - 10, range.label);
    }

    paint->restore();
}