//---------------------------------------------------------------------------
/*
QtRoundedTextRectItem, rectangular-shaped multi-line QGraphicsItem
Copyright (C) 2012-2014 Richel Bilderbeek
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program.If not, see <http://www.gnu.org/licenses/>.
*/
//---------------------------------------------------------------------------
//From http://www.richelbilderbeek.nl/CppQtRoundedTextRectItem.htm
//---------------------------------------------------------------------------
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#pragma GCC diagnostic ignored "-Wunused-but-set-parameter"
#include "qtroundedtextrectitem.h"
#include <cassert>
#include <sstream>
#include <QBrush>
#include <QFont>
#include <QGraphicsScene>
#include <QKeyEvent>
#include <QInputDialog>
#include <QPainter>
//#include "trace.h"
#pragma GCC diagnostic pop
const ribi::QtRoundedTextRectItem::Padding ribi::QtRoundedTextRectItem::m_text_padding(3.0,0.0,0.0,3.0);
ribi::QtRoundedTextRectItem::QtRoundedTextRectItem(
const std::string& text,
const Padding& padding,
const QFont& font,
QGraphicsItem* parent)
: QtRoundedRectItem(parent),
m_font(font),
m_padding(padding),
m_text{}, //Empty std::string, as m_text must be set by SetText
m_text_pen{}
{
this->setFlags(
QGraphicsItem::ItemIsFocusable
| QGraphicsItem::ItemIsMovable
| QGraphicsItem::ItemIsSelectable);
///Obtain a white background
this->setBrush(QBrush(QColor(255,255,255)));
this->SetFont(font);
this->SetRadiusX(4.0);
this->SetRadiusY(4.0);
this->SetText(text);
}
const QRectF ribi::QtRoundedTextRectItem::GetPaddedTextRect() const
{
return GetTextRect().adjusted(
-m_text_padding.left,
-m_text_padding.top,
m_text_padding.right,
m_text_padding.bottom);
}
const QRectF ribi::QtRoundedTextRectItem::GetTextRect() const
{
const double h = QFontMetricsF(m_font).height();
const double w = QFontMetricsF(m_font).width(m_text.c_str());
#ifdef _WIN32
//adjusted(0.0,0.0,2.0,0.0) works fine for 50% of the fonts supplied by Wine under native Lubuntu
//adjusted(0.0,0.0,3.0,0.0) works fine for 80% of the fonts supplied by Wine under native Lubuntu
return QRectF(-0.5 * w, -0.5 * h,w,h).adjusted(0.0,0.0,3.0,0.0);
#else
//adjusted(0.0,0.0,2.0,-1.0) works fine for 90% of the fonts under native Lubuntu
//adjusted(0.0,0.0,3.0,-1.0) works fine for 99% of the fonts under native Lubuntu
//adjusted(0.0,0.0,4.0,-1.0) works fine for all the fonts I've tried under native Lubuntu
return QRectF(-0.5 * w, -0.5 * h,w,h).adjusted(0.0,0.0,2.0,-1.0);
#endif
}
std::string ribi::QtRoundedTextRectItem::GetVersion() noexcept
{
return "1.3";
}
std::vector<std::string> ribi::QtRoundedTextRectItem::GetVersionHistory() noexcept
{
return {
"2012-12-19: version 1.0: initial version",
"2012-12-20: version 1.1: added response to key press, text is displayed fully",
"2012-12-21: version 1.2: added debug drawing, text is displayed correctly to the pixel",
"2012-12-28: version 1.3: fixed incomplete displaying when using Wine",
};
}
void ribi::QtRoundedTextRectItem::keyPressEvent(QKeyEvent* event)
{
switch (event->key())
{
case Qt::Key_F2:
{
bool ok = true;
const QString s = QInputDialog::getText(0,"Edit text","New text",QLineEdit::Normal,m_text.c_str(),&ok);
if (ok) SetText(s.toStdString());
}
break;
}
QtRoundedRectItem::keyPressEvent(event);
}
void ribi::QtRoundedTextRectItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget) noexcept
{
QtRoundedRectItem::paint(painter,option,widget);
painter->setFont(m_font);
//#define DISPLAY_DIFFERENT_RECTS_873658735672347834573985792
#ifdef DISPLAY_DIFFERENT_RECTS_873658735672347834573985792
painter->setBrush(QBrush(QColor(255,0,0)));
painter->drawRect(this->GetPaddedTextRect());
painter->setBrush(QBrush(QColor(0,0,255)));
painter->drawRect(this->GetTextRect());
#endif
painter->setPen(m_text_pen);
painter->drawText(GetTextRect(),m_text.c_str());
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-but-set-parameter"
void ribi::QtRoundedTextRectItem::SetFont(const QFont& font) noexcept
{
if (m_font != font)
{
m_font = font;
this->update();
//this->m_signal_item_has_updated(this);
//m_signal_request_scene_update();
}
}
#pragma GCC diagnostic pop
void ribi::QtRoundedTextRectItem::SetPadding(const Padding& padding) noexcept
{
if ( padding.bottom != m_padding.bottom
|| padding.left != m_padding.left
|| padding.right != m_padding.right
|| padding.top != m_padding.top
)
{
m_padding = padding;
const QRectF text_rect = GetPaddedTextRect();
this->SetRoundedRect(
text_rect.adjusted(
-m_padding.left,
-m_padding.top,
m_padding.right,
m_padding.bottom),
this->GetRadiusX(),
this->GetRadiusY()
);
this->update();
//this->m_signal_item_has_updated(this);
//m_signal_request_scene_update();
}
}
void ribi::QtRoundedTextRectItem::SetText(const std::string& text) noexcept
{
if (text != m_text)
{
m_text = text;
const QRectF text_rect = GetPaddedTextRect();
this->SetRoundedRect(
text_rect.adjusted(
-m_padding.left,
-m_padding.top,
m_padding.right,
m_padding.bottom),
this->GetRadiusX(),
this->GetRadiusY()
);
this->update();
//this->m_signal_item_has_updated(this);
//m_signal_request_scene_update();
}
}
void ribi::QtRoundedTextRectItem::SetTextPen(const QPen& pen) noexcept
{
if (m_text_pen != pen)
{
m_text_pen = pen;
this->update();
//this->m_signal_item_has_updated(this);
}
}
|
