2ebe6e3684
Alignment and scale of DiveTextItems are never changed. Therefore, pass them at construction time. This makes things much easier if we want to cache the rendered text [currently the text is rerendered at every paint() event]. This also removes the "parent=0" default parameter of the constructor, because inadvertently leaving out the last argument led to a subtle bug. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
102 lines
2.4 KiB
C++
102 lines
2.4 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::setBrush(const QBrush &b)
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{
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textItem->setBrush(b);
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}
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void DiveTextItem::setText(const QString &t)
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{
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if (internalText != t) {
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internalText = t;
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updateText();
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}
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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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