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04e0d96bae
The text and the brush are the two properties of text items that change dynamically. To avoid complexities concerning redrawing, set them concurrently instead of in two separate calls. Since setting one of the properties requires a full redraw, there is no performance advantage in setting them individually. This fixes a theoretical bug: the colors of axis labels were not updated appropriately. However, it seems like value-dependent labels weren't used anyway. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
95 lines
2.3 KiB
C++
95 lines
2.3 KiB
C++
// SPDX-License-Identifier: GPL-2.0
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#include "divetextitem.h"
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#include "profilewidget2.h"
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#include "core/color.h"
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#include "core/errorhelper.h"
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#include <QBrush>
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#include <QDebug>
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#include <QApplication>
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DiveTextItem::DiveTextItem(double dpr, double scale, int alignFlags, QGraphicsItem *parent) : QGraphicsItemGroup(parent),
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internalAlignFlags(alignFlags),
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textBackgroundItem(new QGraphicsPathItem(this)),
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textItem(new QGraphicsPathItem(this)),
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dpr(dpr),
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scale(scale)
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{
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setFlag(ItemIgnoresTransformations);
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textBackgroundItem->setBrush(QBrush(getColor(TEXT_BACKGROUND)));
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textBackgroundItem->setPen(Qt::NoPen);
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textItem->setPen(Qt::NoPen);
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}
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void DiveTextItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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updateText();
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QGraphicsItemGroup::paint(painter, option, widget);
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}
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void DiveTextItem::set(const QString &t, const QBrush &b)
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{
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textItem->setBrush(b);
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internalText = t;
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updateText();
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}
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const QString &DiveTextItem::text()
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{
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return internalText;
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}
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QFont DiveTextItem::getFont(double dpr, double scale)
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{
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QFont fnt(qApp->font());
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double size = fnt.pixelSize();
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if (size > 0) {
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// set in pixels - so the scale factor may not make a difference if it's too close to 1
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size *= scale * dpr;
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fnt.setPixelSize(lrint(size));
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} else {
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size = fnt.pointSizeF();
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size *= scale * dpr;
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fnt.setPointSizeF(size);
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}
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return fnt;
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}
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double DiveTextItem::fontHeight(double dpr, double scale)
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{
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QFont fnt = getFont(dpr, scale);
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QFontMetrics fm(fnt);
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return (double)fm.height();
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}
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double DiveTextItem::height() const
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{
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return fontHeight(dpr, scale);
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}
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void DiveTextItem::updateText()
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{
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if (internalText.isEmpty())
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return;
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QFont fnt = getFont(dpr, scale);
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QFontMetrics fm(fnt);
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QPainterPath textPath;
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qreal xPos = 0, yPos = 0;
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QRectF rect = fm.boundingRect(internalText);
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yPos = (internalAlignFlags & Qt::AlignTop) ? 0 :
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(internalAlignFlags & Qt::AlignBottom) ? +rect.height() :
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/*(internalAlignFlags & Qt::AlignVCenter ? */ +rect.height() / 4;
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xPos = (internalAlignFlags & Qt::AlignLeft) ? -rect.width() :
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(internalAlignFlags & Qt::AlignHCenter) ? -rect.width() / 2 :
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/* (internalAlignFlags & Qt::AlignRight) */ 0;
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textPath.addText(xPos, yPos, fnt, internalText);
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QPainterPathStroker stroker;
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stroker.setWidth(3);
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textBackgroundItem->setPath(stroker.createStroke(textPath));
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textItem->setPath(textPath);
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}
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