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#include "searchlineedit.h"#include <QtGui/QPainter>#include <QtGui/QMouseEvent>#include <QtWidgets/QMenu>#include <QtWidgets/QStyle>#include <QtWidgets/QStyleOptionFrame>
ClearButton::ClearButton(QWidget*parent)
: QAbstractButton(parent)
{
#ifndef QT_NO_CURSOR
setCursor(Qt::ArrowCursor);
#endif // QT_NO_CURSOR
setToolTip(tr("Clear"));
setVisible(false);
setFocusPolicy(Qt::NoFocus);
}
void ClearButton::paintEvent(QPaintEvent*event)
{
Q_UNUSED(event);
QPainter painter(this);
int height =this->height();
painter.setRenderHint(QPainter::Antialiasing,true);
painter.setBrush(isDown()
? palette().color(QPalette::Dark)
: palette().color(QPalette::Mid));
painter.setPen(painter.brush().color());
int size = width();
int offset = size /5;
int radius = size - offset *2;
painter.drawEllipse(offset, offset, radius, radius);
painter.setPen(palette().color(QPalette::Base));
int border = offset *2;
painter.drawLine(border, border, width() - border, height - border);
painter.drawLine(border, height - border, width() - border, border);
}
void ClearButton::textChanged(constQString&text)
{
setVisible(!text.isEmpty());
}
/*
Search icon on the left hand side of the search widget
When a menu is set a down arrow appears
*/class SearchButton : publicQAbstractButton {
public:
SearchButton(QWidget*parent =0);
void paintEvent(QPaintEvent*event);
QMenu*m_menu;
protected:
void mousePressEvent(QMouseEvent*event);
};
SearchButton::SearchButton(QWidget*parent)
: QAbstractButton(parent),
m_menu(0)
{
setObjectName(QLatin1String("SearchButton"));
#ifndef QT_NO_CURSOR
setCursor(Qt::ArrowCursor);
#endif //QT_NO_CURSOR
setFocusPolicy(Qt::NoFocus);
}
void SearchButton::mousePressEvent(QMouseEvent*event)
{
if (m_menu && event->button() ==Qt::LeftButton) {
QWidget*p = parentWidget();
if (p) {
QPoint r = p->mapToGlobal(QPoint(0, p->height()));
m_menu->exec(QPoint(r.x() + height() /2, r.y()));
}
event->accept();
}
QAbstractButton::mousePressEvent(event);
}
void SearchButton::paintEvent(QPaintEvent*event)
{
Q_UNUSED(event);
QPainterPath myPath;
int radius = (height() /5) *2;
QRect circle(height() /3-1, height() /4, radius, radius);
myPath.addEllipse(circle);
myPath.arcMoveTo(circle,300);
QPointF c = myPath.currentPosition();
int diff = height() /7;
myPath.lineTo(qMin(width() -2, (int)c.x() + diff), c.y() + diff);
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing,true);
painter.setPen(QPen(Qt::darkGray,2));
painter.drawPath(myPath);
if (m_menu) {
QPainterPath dropPath;
dropPath.arcMoveTo(circle,320);
QPointF c = dropPath.currentPosition();
c =QPointF(c.x() +3.5, c.y() +0.5);
dropPath.moveTo(c);
dropPath.lineTo(c.x() +4, c.y());
dropPath.lineTo(c.x() +2, c.y() +2);
dropPath.closeSubpath();
painter.setPen(Qt::darkGray);
painter.setBrush(Qt::darkGray);
painter.setRenderHint(QPainter::Antialiasing,false);
painter.drawPath(dropPath);
}
painter.end();
}
/*
SearchLineEdit is an enhanced QLineEdit
- A Search icon on the left with optional menu
- When there is no text and doesn't have focus an "inactive text" is displayed
- When there is text a clear button is displayed on the right hand side
*/
SearchLineEdit::SearchLineEdit(QWidget*parent) : ExLineEdit(parent),
m_searchButton(new SearchButton(this))
{
connect(lineEdit(), SIGNAL(textChanged(QString)),this, SIGNAL(textChanged(QString)));
setLeftWidget(m_searchButton);
m_inactiveText = tr("Search");
QSizePolicy policy = sizePolicy();
setSizePolicy(QSizePolicy::Preferred, policy.verticalPolicy());
}
void SearchLineEdit::paintEvent(QPaintEvent*event)
{
if (lineEdit()->text().isEmpty() &&!hasFocus() &&!m_inactiveText.isEmpty()) {
ExLineEdit::paintEvent(event);
QStyleOptionFrame panel;
initStyleOption(&panel);
QRect r = style()->subElementRect(QStyle::SE_LineEditContents,&panel,this);
QFontMetrics fm = fontMetrics();
int horizontalMargin = lineEdit()->x();
QRect lineRect(horizontalMargin + r.x(), r.y() + (r.height() - fm.height() +1) /2,
r.width() -2* horizontalMargin, fm.height());
QPainter painter(this);
painter.setPen(palette().brush(QPalette::Disabled,QPalette::Text).color());
painter.drawText(lineRect,Qt::AlignLeft|Qt::AlignVCenter, m_inactiveText);
} else {
ExLineEdit::paintEvent(event);
}
}
void SearchLineEdit::resizeEvent(QResizeEvent*event)
{
updateGeometries();
ExLineEdit::resizeEvent(event);
}
void SearchLineEdit::updateGeometries()
{
int menuHeight = height();
int menuWidth = menuHeight +1;
if (!m_searchButton->m_menu)
menuWidth = (menuHeight /5) *4;
m_searchButton->resize(QSize(menuWidth, menuHeight));
}
QString SearchLineEdit::inactiveText() const
{
return m_inactiveText;
}
void SearchLineEdit::setInactiveText(constQString&text)
{
m_inactiveText = text;
}
void SearchLineEdit::setMenu(QMenu*menu)
{
if (m_searchButton->m_menu)
m_searchButton->m_menu->deleteLater();
m_searchButton->m_menu = menu;
updateGeometries();
}
QMenu*SearchLineEdit::menu() const
{
if (!m_searchButton->m_menu) {
m_searchButton->m_menu =newQMenu(m_searchButton);
if (isVisible())
(const_cast<SearchLineEdit*>(this))->updateGeometries();
}
return m_searchButton->m_menu;
}
