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  1. 25th July 2009, 19:17 #1
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    wysota
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    Default Re: QTreeWidgetItem - widget with layout collapsing

    The best way is not to embed widgets but use delegates or at least report a proper size hint from the items.

    And please don't link images from 3-rd party sites, they tend to vanish over time making the thread useless. Attach images to your post instead.
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  2. 25th July 2009, 19:33 #2
    enkidu
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    Default Re: QTreeWidgetItem - widget with layout collapsing

    so I should try with QTreeView and QItemDelegate? I wanted to avoid that.

    Images are located on my server, so wont disappear without my knowledge
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  3. 25th July 2009, 19:43 #3
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    Default Re: QTreeWidgetItem - widget with layout collapsing

    Quote Originally Posted by enkidu View Post
    so I should try with QTreeView and QItemDelegate? I wanted to avoid that.
    You can keep using QTreeWidget but you should implement your own item delegate.

    Images are located on my server, so wont disappear without my knowledge
    But they will disappear without my knowledge. I don't care if you remove them willingly or not, it's a fact that if they disappear, others won't benefit from this thread.
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  4. 9th August 2009, 22:50 #4
    enkidu
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    Default Re: QTreeWidgetItem - widget with layout collapsing

    After making some other task I decided to reimplement item delegate. I modified StarDelegate example and finally got this:
    qtlenrosteritemdelegate.hpp
    Qt Code: 
    1. #ifndef QTLENROSTERITEMDELEGATE_HPP
    2. #define QTLENROSTERITEMDELEGATE_HPP
    3. #include <QtGui>
    4. #include "qtlenrosteritem.hpp"
    5. class QTlenRosterItemDelegate: public QStyledItemDelegate
    6. {
    7.     Q_OBJECT
    8. public:
    9.     QTlenRosterItemDelegate(QWidget *parent = 0) : QStyledItemDelegate(parent) {}
    10.     void paint(QPainter *painter, const QStyleOptionViewItem &option,
    11.         const QModelIndex &index) const;
    12.     QSize sizeHint(const QStyleOptionViewItem &option,
    13.         const QModelIndex &index) const;
    14.  
    15. };
    16.  
    17. #endif // QTLENROSTERITEMDELEGATE_HPP
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    qtlenrosteritemdelegate.cpp
    Qt Code: 
    1. void QTlenRosterItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
    2.                           const QModelIndex &index) const
    3. {
    4.      if (qVariantCanConvert<QTlenRosterItem>(index.data())) {
    5.          QTlenRosterItem rosterItem = qVariantValue<QTlenRosterItem>(index.data());
    6.          bool checked = false;
    7.          if (option.state & QStyle::State_Selected)
    8.          {
    9.              painter->fillRect(option.rect, option.palette.highlight());
    10.              checked = true;
    11.          }
    12.          rosterItem.setHeight(rosterItem.paint(painter, option.rect, option.palette, checked));
    13.      } else {
    14.          QStyledItemDelegate::paint(painter, option, index);
    15.      }
    16. }
    17.  
    18. QSize QTlenRosterItemDelegate::sizeHint(const QStyleOptionViewItem &option,
    19.                               const QModelIndex &index) const
    20. {
    21.      if (qVariantCanConvert<QTlenRosterItem>(index.data())) {
    22.  
    23.          QTlenRosterItem rosterItem = qVariantValue<QTlenRosterItem>(index.data());
    24.          return rosterItem.sizeHint(option);
    25.      } else {
    26.          return QStyledItemDelegate::sizeHint(option, index);
    27.      }
    28. }
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    qtlenrosteritem.hpp
    Qt Code: 
    1. #ifndef QTLENROSTERITEM_HPP
    2. #define QTLENROSTERITEM_HPP
    3. #include "defines.h"
    4. #include <QtGui>
    5. class QTlenRosterItem
    6. {
    7. public:
    8.     QTlenRosterItem(QString name = "", QTlenPresence type = Offline, QString desc="", QString jid="", QPixmap pxAvatar=QPixmap());
    9.     int paint(QPainter *painter, const QRect &rect,
    10.                 const QPalette &palette, bool checked) const;
    11.     QSize sizeHint(const QStyleOptionViewItem &option) const;
    12.     int height;
    13.     void setHeight(int);
    14. private:
    15.     QString name;
    16.     QPixmap presence;
    17.     QString desc;
    18.     QString jid;
    19.     QPixmap avatar;
    20. };
    21. Q_DECLARE_METATYPE(QTlenRosterItem)
    22. #endif // QTLENROSTERITEM_HPP
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    qtlenrosteritem.cpp
    Qt Code: 
    1. #include "qtlenrosteritem.hpp"
    2.  
    3. QTlenRosterItem::QTlenRosterItem(QString name, QTlenPresence type, QString desc, QString jid, QPixmap pxAvatar)
    4. {
    5.     this->name = name;
    6.     this->desc = desc;
    7.     this->jid = jid;
    8.     this->avatar = pxAvatar;
    9.     height = 68;
    10.     switch (type)
    11.         {
    12.                 case Online:
    13.                         presence=QPixmap(QString::fromUtf8(":/icons/icons/16x16/online.png"));
    14.                 break;
    15.                 case Chatty:
    16.                         presence=QPixmap(QString::fromUtf8(":/icons/icons/16x16/chatty.png"));
    17.                 break;
    18.                 case Away:
    19.                         presence=QPixmap(QString::fromUtf8(":/icons/icons/16x16/away.png"));
    20.                 break;
    21.                 case XA:
    22.                         presence=QPixmap(QString::fromUtf8(":/icons/icons/16x16/xa.png"));
    23.                 break;
    24.                 case DND:
    25.                         presence=QPixmap(QString::fromUtf8(":/icons/icons/16x16/dnd.png"));
    26.                 break;
    27.                 case Offline:
    28.                         presence=QPixmap(QString::fromUtf8(":/icons/icons/16x16/offline.png"));
    29.                 break;
    30.         }
    31. }
    32.  
    33. int QTlenRosterItem::paint(QPainter *painter, const QRect &rect, const QPalette &palette, bool checked) const
    34. {
    35.     painter->save();
    36.     painter->setRenderHint(QPainter::Antialiasing, true);
    37.     if (checked) painter->setBrush(palette.highlightedText());
    38.     else
    39.         painter->setBrush(palette.foreground());
    40.     //name
    41.     QRect nameRect;
    42.     nameRect.setLeft(rect.left()+20);
    43.     nameRect.setRight(rect.right()-68);
    44.     nameRect.setTop(rect.top()+2);
    45.     nameRect.setBottom(rect.bottom()-2);
    46.     QRect *nameBR = new QRect;
    47.     QFont nameFont;
    48.     nameFont.setBold(true);
    49.     painter->setFont(nameFont);
    50.     painter->drawText(nameRect, (int)(Qt::AlignLeft | Qt::TextWordWrap), name, nameBR);
    51.     //jid
    52.     QRect jidRect;
    53.     jidRect.setLeft(rect.left()+20);
    54.     jidRect.setRight(rect.right()-68);
    55.     jidRect.setTop(nameBR->bottom()+2);
    56.     jidRect.setBottom(nameBR->bottom()+18);
    57.     QRect *jidBR = new QRect;
    58.     nameFont.setBold(false);
    59.     painter->setFont(nameFont);
    60.     painter->drawText(jidRect,  (int)(Qt::AlignLeft | Qt::TextWordWrap), jid,  jidBR);
    61.     //desc
    62.     QRect descRect;
    63.     descRect.setLeft(rect.left()+20);
    64.     descRect.setRight(rect.right()-68);
    65.     descRect.setTop(jidBR->bottom()+2);
    66.     descRect.setBottom(rect.bottom()-2);
    67.     QRect *descBR = new QRect;
    68.     QFont descFont;
    69.     descFont.setPointSize(7);
    70.     descFont.setItalic(true);
    71.     painter->setFont(descFont);
    72.     painter->drawText(descRect, (int)(Qt::AlignLeft | Qt::TextWordWrap), desc, descBR);
    73.     int textHeight = nameBR->height() + jidBR->height() + descBR->height()+8;
    74.     int theight;
    75.     if (textHeight > 68)
    76.         theight = textHeight;
    77.     else
    78.         theight = 68;
    79.     //setHeight(68);
    80.     painter->drawPixmap(rect.left()+2, rect.top()-8+rect.height()/2,16, 16, presence);
    81.     painter->drawPixmap(rect.right()-66, rect.top()+2, 64, 64, avatar);
    82.     painter->restore();
    83.     return theight;
    84. }
    85.  
    86.  QSize QTlenRosterItem::sizeHint(const QStyleOptionViewItem &option) const
    87.  {
    88.      qDebug(QByteArray::number(option.rect.right()));
    89.      QFont descFont;
    90.      descFont.setPointSize(7);
    91.      descFont.setItalic(true);
    92.      QFontMetrics fm(descFont);
    93.      QRect rect = fm.boundingRect(0,0,80,160, (int)(Qt::AlignLeft | Qt::TextWordWrap), desc);
    94.      int h = rect.height();
    95.      if ((h + 30) < 68)
    96.          return QSize(160, 68);
    97.      return QSize(160, h+30);
    98.  }
    99.  
    100.  void QTlenRosterItem::setHeight(int h)
    101.  {
    102.      height = h;
    103.  }
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    What I found, that in calculating SizeHint option.rect is not providing width, so I cannot calculate width of text blocks properly. This results in improper calculated height (only few pixels fortunately). Other thing, that is strange for me (maybe I'm misunderstanding docs) is that painter->setBrush(palette.highlightedText()); doesn't work as expected - text is still black (as if I used painter->setBrush(palette.foreground()) while for selected items should be white (or other colour derived from style). Any ideas? Thanks in advance.
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