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//===========================================
// Lumina-DE source code
// Copyright (c) 2015, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
// This is a simple subclass for a QToolButton with black/white text (for transparent backgrounds)
//===========================================
#ifndef _LUMINA_DESKTOP_PLUGIN_APPLAUNCHER_OUTLINE_TOOLBUTTON_H
#define _LUMINA_DESKTOP_PLUGIN_APPLAUNCHER_OUTLINE_TOOLBUTTON_H
#include <QToolButton>
#include <QPainter>
#include <QPainterPath>
#include <QPen>
#include <QStyle>
#include <QStyleOption>
#include <QStylePainter>
#include <QFont>
#include <QDebug>
class OutlineToolButton : public QToolButton{
Q_OBJECT
public:
OutlineToolButton(QWidget *parent=0) : QToolButton(parent){
}
~OutlineToolButton(){}
protected:
void paintEvent(QPaintEvent*){
/* NOTE: This is what a standard QToolButton performs (peeked at Qt source code for this tidbit)
QStylePainter p(this);
QStyleOptionToolButton opt;
initStyleOption(&opt);
p.drawComplexControl(QStyle::CC_ToolButton, opt);
*/
//Modify the standard QToolButton routine to paint the text differently
QStylePainter p(this);
QStyleOptionToolButton opt;
initStyleOption(&opt);
opt.font.setStyleStrategy(QFont::PreferAntialias); //Always set the font strategy (just in case it starts working down the road)
opt.font.setWeight(2*opt.font.weight()); //need a slightly heavier weight due to outlining later
opt.text.clear(); //Don't paint the text yet - just the background/icon
p.drawComplexControl(QStyle::CC_ToolButton, opt); //This does all the normal QToolButton stuff - just not text
//Now get the text rectangle for the widget
QRect box = p.style()->itemTextRect(opt.fontMetrics, opt.rect, Qt::AlignHCenter | Qt::AlignBottom, true, this->text());
//Get the QColors for the outline/text
/*QColor textC = opt.palette.text().color().toHsl(); //need the lightness value in a moment
QColor outC;
qDebug() << "Font Color Values:" << textC << textC.lightness() << textC.lightnessF();
if(textC.lightnessF() > 0.5){ outC = textC.darker(1000); } //1000% darker
else{ outC = textC.lighter(1000); } //1000% lighter
qDebug() << "Outline Color Values:" << outC;*/
//Now generate a QPainterPath for the text
QPainterPath path;
QStringList txt = this->text().split("\n"); //need each line independently, the newline actually gets painted otherwise
for(int i=0; i<txt.length(); i++){
path.addText(box.center().x() - (opt.fontMetrics.width(txt[i])/2), box.y()+((i+1)*(box.height()/txt.length()))-opt.fontMetrics.descent(), opt.font, txt[i] );
}
path.setFillRule(Qt::WindingFill);
//Now paint them
p.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
p.strokePath(path, QPen(QColor(Qt::white)));//outC)) ); //This will be the outline - 1pixel thick
p.fillPath(path, QBrush(Qt::black));//textC)); //this will be the inside/text color
/*opt.font.setWeight(50); //reset back to the normal text size
opt.palette = QPalette(Qt::white);
p.drawControl(QStyle::CE_ToolButtonLabel, opt); //don't do the full background on top again - just the labels (icon/text)*/
}
};
#endif
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