69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
/*
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This file is part of EqualizerAPO, a system-wide equalizer.
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Copyright (C) 2015 Jonas Thedering
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <QGraphicsScene>
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#include <QPainter>
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#include "Editor/helpers/DPIHelper.h"
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#include "ChannelGraphItem.h"
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static const float margin = 5;
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ChannelGraphItem::ChannelGraphItem(const QString& name)
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: name(name)
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{
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}
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QRectF ChannelGraphItem::boundingRect() const
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{
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if (cachedRect.isNull())
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{
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QFontMetrics metrics(scene()->font());
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int width = metrics.size(0, name).width();
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// we only use upper case characters and digits, so everything is above the baseline
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int height = metrics.ascent();
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// make it at least quadratic
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if (width < height)
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width = height;
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// shift by 0.5 to have sharp lines
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cachedRect.setLeft(0.5);
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cachedRect.setTop(0.5);
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cachedRect.setWidth(width + 2 * DPIHelper::scale(margin));
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cachedRect.setHeight(height + 2 * DPIHelper::scale(margin));
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}
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return cachedRect;
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}
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QString ChannelGraphItem::getName() const
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{
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return name;
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}
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void ChannelGraphItem::paint(QPainter* painter, QColor color)
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{
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QRectF rect = boundingRect();
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QLinearGradient gradient(rect.topLeft(), rect.bottomLeft());
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gradient.setColorAt(0, QColor(255, 255, 255));
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gradient.setColorAt(1, color);
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painter->setBrush(gradient);
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painter->drawRoundedRect(rect, DPIHelper::scale(margin), DPIHelper::scale(margin));
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painter->drawText(rect.translated(1, -1), Qt::AlignCenter, name);
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}
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