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Merge pull request #61 from PhenomRetroShare/Improve_ElidedLabel_Alignment_HTML

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Improve ElidedLabel
This commit is contained in:
Cyril Soler 2015-08-31 10:43:29 -04:00
commit ef292faa22
2 changed files with 134 additions and 20 deletions
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136
retroshare-gui/src/gui/common/ElidedLabel.cpp
View File

@ -40,23 +40,30 @@
#include "ElidedLabel.h"
#include <QPainter>
#include <QTextLayout>
#include <QDebug>
#include <QPainter>
#include <QStyleOption>
#include <QTextDocument>
#include <QTextLayout>
#include <QToolTip>
ElidedLabel::ElidedLabel(const QString &text, QWidget *parent)
: QLabel(parent)
, mElided(false)
, mOnlyPlainText(false)
, mContent(text)
{
mRectElision = QRect();
setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
}
ElidedLabel::ElidedLabel(QWidget *parent)
: QLabel(parent)
, mElided(false)
, mOnlyPlainText(false)
, mContent("")
{
mRectElision = QRect();
setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
}
@ -66,6 +73,12 @@ void ElidedLabel::setText(const QString &newText)
update();
}
void ElidedLabel::setOnlyPlainText(const bool &value)
{
mOnlyPlainText = value;
update();
}
void ElidedLabel::clear()
{
mContent.clear();
@ -75,43 +88,138 @@ void ElidedLabel::clear()
void ElidedLabel::paintEvent(QPaintEvent *event)
{
QLabel::paintEvent(event);
QList<QPair<QTextLine,QPoint> > lLines;
QString elidedLastLine = "";
QPainter painter(this);
QFontMetrics fontMetrics = painter.fontMetrics();
QRect cr = contentsRect();
cr.adjust(margin(), margin(), -margin(), -margin());
bool didElide = false;
QChar ellipsisChar(0x2026);//= "…"
int lineSpacing = fontMetrics.lineSpacing();
int x, y = x =cr.top()+(cr.height()-lineSpacing)/2;
int y = 0;
QString plainText = "";
if (mOnlyPlainText)
{
plainText = mContent;
} else {
QTextDocument td;
td.setHtml(mContent);
plainText = td.toPlainText();
}
plainText = plainText.replace("\n",QChar(QChar::LineSeparator));
plainText = plainText.replace("\r",QChar(QChar::LineSeparator));
QTextLayout textLayout(plainText, painter.font());
QTextOption to = textLayout.textOption();
to.setAlignment(alignment());
to.setWrapMode(wordWrap() ? QTextOption::WrapAtWordBoundaryOrAnywhere : QTextOption::NoWrap);
textLayout.setTextOption(to);
QTextLayout textLayout(mContent, painter.font());
textLayout.beginLayout();
forever {
//Get new line for text.
QTextLine line = textLayout.createLine();
if (!line.isValid())
break;
break;// No more line to write
line.setLineWidth(cr.width()+2*x);
line.setLineWidth(cr.width());
int nextLineY = y + lineSpacing;
if (cr.height() >= nextLineY + lineSpacing) {
line.draw(&painter, QPoint(x, y));
if ((cr.height() >= nextLineY + lineSpacing) && wordWrap()) {
//Line written normaly, next line will too
lLines.append(QPair<QTextLine, QPoint>(line, QPoint(0, y)));
y = nextLineY;
} else {
QString lastLine = mContent.mid(line.textStart());
QString elidedLastLine = fontMetrics.elidedText(lastLine, Qt::ElideRight, cr.width());
painter.drawText(QPoint(x, y + fontMetrics.ascent()), elidedLastLine);
line = textLayout.createLine();
didElide = line.isValid();
//The next line can't be written.
QString lastLine = plainText.mid(line.textStart()).split(QChar(QChar::LineSeparator)).at(0);
QTextLine lineEnd = textLayout.createLine();
if (!lineEnd.isValid() && (wordWrap()
|| (fontMetrics.width(lastLine) < cr.width()))) {
//No more text for next line so this one is OK
lLines.append(QPair<QTextLine, QPoint>(line, QPoint(0, y)));
elidedLastLine="";
didElide = false;
} else {
//Text is left, so get elided text
if (lastLine == "") {
elidedLastLine = ellipsisChar;
} else {
elidedLastLine = fontMetrics.elidedText(lastLine, Qt::ElideRight, cr.width()-1);
if (elidedLastLine.right(1) != ellipsisChar)
elidedLastLine.append(ellipsisChar);//New line at end
}
didElide = true;
break;
}
}
}
textLayout.endLayout();
int iTransX, iTransY = iTransX = 0;
int iHeight = lLines.count() * lineSpacing;
if (didElide) iHeight += lineSpacing;
//Compute lines translation with alignment
if (alignment() & Qt::AlignTop)
iTransY = 0;
if (alignment() & Qt::AlignBottom)
iTransY = cr.height() - iHeight;
if (alignment() & Qt::AlignVCenter)
iTransY = (cr.height() - iHeight) / 2;
QPair<QTextLine,QPoint> pair;
QPoint lastPos(-1,-1);
//Now we know how many lines to redraw at good position
foreach (pair, lLines){
lastPos = pair.second + QPoint(0, iTransY);
pair.first.draw(&painter, lastPos);
}
//Print last elided line
if (didElide) {
int width = fontMetrics.width(elidedLastLine);
if (lastPos.y() == -1){
y = iTransY;// Only one line
} else {
y = lastPos.y() + lineSpacing;
}
if (width < cr.width()){
//Text don't taking all line (with line break), so align it
if (alignment() & Qt::AlignLeft)
iTransX = 0;
if (alignment() & Qt::AlignRight)
iTransX = cr.width() - width;
if (alignment() & Qt::AlignHCenter)
iTransX = (cr.width() - width) / 2;
if (alignment() & Qt::AlignJustify)
iTransX = 0;
}
painter.drawText(QPoint(iTransX, y + fontMetrics.ascent()), elidedLastLine);
//Draw button to get ToolTip
mRectElision = QRect(iTransX + width - fontMetrics.width(ellipsisChar)
, y
, fontMetrics.width(ellipsisChar)
, fontMetrics.height() - 1);
painter.drawRoundRect(mRectElision);
} else {
mRectElision = QRect();
}
//Send signal if changed
if (didElide != mElided) {
mElided = didElide;
emit elisionChanged(didElide);
}
}
void ElidedLabel::mousePressEvent(QMouseEvent *ev)
{
if (mElided && (ev->buttons()==Qt::LeftButton) && (mRectElision.contains(ev->pos()))){
QToolTip::showText(mapToGlobal(QPoint(0, 0)),QString("<FONT>") + mContent + QString("</FONT>"));
}
}

6
retroshare-gui/src/gui/common/ElidedLabel.h
View File

@ -52,6 +52,7 @@ class ElidedLabel : public QLabel
Q_OBJECT
Q_PROPERTY(QString text READ text WRITE setText)
Q_PROPERTY(bool isElided READ isElided)
Q_PROPERTY(bool isOnlyPlainText READ isOnlyPlainText WRITE setOnlyPlainText)
public:
ElidedLabel(const QString &text, QWidget *parent = 0);
@ -59,20 +60,25 @@ public:
const QString & text() const { return mContent; }
bool isElided() const { return mElided; }
bool isOnlyPlainText() const { return mOnlyPlainText; }
public slots:
void setText(const QString &text);
void setOnlyPlainText(const bool &value);
void clear();
protected:
void paintEvent(QPaintEvent *event);
void mousePressEvent(QMouseEvent *ev);
signals:
void elisionChanged(bool elided);
private:
bool mElided;
bool mOnlyPlainText;
QString mContent;
QRect mRectElision;
};
#endif // ELIDEDLABEL_H