August 11, 2012

oggie oggie
Lab Rat
5 posts

QPushButton delegate en QTableView

 

Hola,

Tengo una aplicación de escritorio que simula un CRUD y uso un buttondelegate
para actualizar y borrar. La questión es que para cada delegate me despliega un
botón de más.

1.- clase ButtonColumnDelegate

  1. ButtonColumnDelegate::ButtonColumnDelegate(QObject *parent) :
  2.     QStyledItemDelegate(parent)
  3. {
  4.     if(QTableView *tableView = qobject_cast<QTableView *>(parent))
  5.     {
  6.         myWidget = tableView;
  7.         btn = new QPushButton("...", myWidget);
  8.         btn->show();
  9.         myWidget->setMouseTracking(true);
  10.         connect(myWidget, SIGNAL(entered(QModelIndex)),
  11.                               this, SLOT(cellEntered(QModelIndex)));
  12.         isOneCellInEditMode = false;
  13.     }
  14. }
  15.  
  16. ButtonColumnDelegate::~ButtonColumnDelegate()
  17. {
  18.  
  19. }
  20.  
  21. //createEditor
  22. QWidget * ButtonColumnDelegate::createEditor(QWidget *parent,
  23.         const QStyleOptionViewItem &option,
  24.         const QModelIndex &index) const
  25. {
  26.     QString header = index.model()->headerData(index.column(), Qt::Horizontal, Qt::UserRole).toString();
  27.     if ((header == "Update") || (header == "Insert"))
  28.     {
  29.         QPushButton * btn = new QPushButton(parent);
  30.         btn->setText(index.data().toString());
  31.         return btn;
  32.     } else {
  33.         return QStyledItemDelegate::createEditor(parent, option, index);
  34.     }
  35. }
  36.  
  37. //setEditorData
  38. void ButtonColumnDelegate::setEditorData(QWidget *editor,
  39.                                  const QModelIndex &index) const
  40. {
  41.     QString header = index.model()->headerData(index.column(), Qt::Horizontal, Qt::UserRole).toString();
  42.     if ((header == "Update") || (header == "Insert"))
  43.     {
  44.         QPushButton * btn = qobject_cast<QPushButton *>(editor);
  45.         btn->setProperty("data_value", index.data());
  46.     } else {
  47.         QStyledItemDelegate::setEditorData(editor, index);
  48.     }
  49. }
  50.  
  51. //setModelData
  52. void ButtonColumnDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
  53.                                 const QModelIndex &index) const
  54. {
  55.     QString header = index.model()->headerData(index.column(), Qt::Horizontal, Qt::UserRole).toString();
  56.     if ((header == "Update") || (header == "Insert"))
  57.     {
  58.         QPushButton *btn = qobject_cast<QPushButton *>(editor);
  59.         model->setData(index, btn->property("data_value"));
  60.     } else {
  61.         QStyledItemDelegate::setModelData(editor, model, index);
  62.     }
  63. }
  64.  
  65. //paint
  66. void ButtonColumnDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
  67. {
  68.     QString header = index.model()->headerData(index.column(), Qt::Horizontal, Qt::UserRole).toString();
  69.     if((header == "Update") || (header == "Insert"))
  70.     {
  71.         btn->setGeometry(option.rect);
  72.         btn->setText(index.data().toString());
  73.         if (option.state == QStyle::State_Selected)
  74.                      painter->fillRect(option.rect, option.palette.highlight());
  75.         QPixmap map = QPixmap::grabWidget(btn);
  76.         painter->drawPixmap(option.rect.x(),option.rect.y(),map);
  77.     } else {
  78.         QStyledItemDelegate::paint(painter, option, index);
  79.     }
  80. }
  81.  
  82. //updateGeometry
  83. void ButtonColumnDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
  84. {
  85.     editor->setGeometry(option.rect);
  86. }
  87.  
  88. //cellEntered
  89. void ButtonColumnDelegate::cellEntered(const QModelIndex &index)
  90. {
  91.     QString header = index.model()->headerData(index.column(), Qt::Horizontal, Qt::UserRole).toString();
  92.     if((header == "Update") || (header == "Insert"))
  93.     {
  94.         if(isOneCellInEditMode)
  95.         {
  96.             myWidget->closePersistentEditor(currentEditedCellIndex);
  97.         }
  98.         myWidget->openPersistentEditor(index);
  99.         isOneCellInEditMode = true;
  100.         currentEditedCellIndex = index;
  101.     } else {
  102.         if(isOneCellInEditMode)
  103.         {
  104.             isOneCellInEditMode = false;
  105.             myWidget->closePersistentEditor(currentEditedCellIndex);
  106.         }
  107.     }
  108. }

Está tomado de internet adding-button-to-qviewtable [qtadventures.wordpress.com].

2.- clase Browser (la ventana de la aplicación)

  1. void Browser::exec()
  2. {
  3.     QSqlQueryModel *myModel = new QSqlQueryModel(table);
  4.     myModel->setQuery(QSqlQuery(sqlEdit->toPlainText(), connectionWidget->currentDatabase()));
  5.  
  6.     if (myModel->query().isSelect()) {
  7.         // Create the data model
  8.         model = new QStandardItemModel();
  9.         table->setModel(model);
  10.         ButtonColumnDelegate *update = new ButtonColumnDelegate(table);
  11.         ButtonColumnDelegate *insert = new ButtonColumnDelegate(table);
  12.         table->setItemDelegateForColumn(2, update);
  13.         table->setItemDelegateForColumn(3, insert);
  14.  
  15.  
  16.         model->insertRows(0, myModel->query().size());
  17.         model->insertColumns(0, 4);
  18.  
  19.         // Set the localized header captions
  20.         model->setHeaderData(0, Qt::Horizontal, "Id", Qt::UserRole);
  21.         model->setHeaderData(1, Qt::Horizontal, "Word", Qt::UserRole);
  22.         model->setHeaderData(2, Qt::Horizontal, "Update", Qt::UserRole);
  23.         model->setHeaderData(3, Qt::Horizontal, "Insert", Qt::UserRole);
  24.  
  25.         // ...
  26. }

Y duplica el botón de la ultima fila.

Gracias de antemano,
oggie

2 replies

August 13, 2012

oggie oggie
Lab Rat
5 posts

Creo que posiblemente la causa esté en la lógica de la función,

  1. //cellEntered
  2. void ButtonColumnDelegate::cellEntered(const QModelIndex &index)
  3. {
  4.     QString header = index.model()->headerData(index.column(), Qt::Horizontal, Qt::UserRole).toString();
  5.     if((header == "Update") || (header == "Insert"))
  6.     {
  7.         if(isOneCellInEditMode)
  8.         {
  9.             myWidget->closePersistentEditor(currentEditedCellIndex);
  10.         }
  11.         myWidget->openPersistentEditor(index);
  12.         isOneCellInEditMode = true;
  13.         currentEditedCellIndex = index;
  14.     } else {
  15.         if(isOneCellInEditMode)
  16.         {
  17.             isOneCellInEditMode = false;
  18.             myWidget->closePersistentEditor(currentEditedCellIndex);
  19.         }
  20.     }
  21. }

No estoy seguro dado que soy nuevo en esto pero posiblemente la variable booleana isOneCellInEditMode no esté bien controlada y habilite la opción de editar un botón de más.

Cualquier sugerencia será gratamente apreciada.

oggie

August 18, 2012

oggie oggie
Lab Rat
5 posts

Al final preferí usar esta otra clase con las correciones que aparecen en el código y ya funciona.

customitemdelegate.h.-

  1. #ifndef CUSTOMITEMDELEGATE_H
  2. #define CUSTOMITEMDELEGATE_H
  3.  
  4. #include <QItemDelegate>
  5.  
  6. class CustomItemDelegate : public QItemDelegate
  7. {
  8.     Q_OBJECT
  9.  
  10. public:
  11.     explicit CustomItemDelegate(QObject *parent = 0);
  12.  
  13.     virtual void paint(QPainter *painter,
  14.                        const QStyleOptionViewItem &option,
  15.                        const QModelIndex &index) const ;
  16.  
  17.     virtual QSize sizeHint(const QStyleOptionViewItem &option,
  18.                            const QModelIndex &index) const ;
  19.  
  20.     bool editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index);
  21.  
  22. signals:
  23.     void updButtonClicked(const QModelIndex &index);
  24.     void delButtonClicked(const QModelIndex &index);
  25.  
  26. public slots:
  27.  
  28. private:
  29.     QStyle::State  _state;
  30.     QRect oldRect;
  31. };
  32.  
  33. #endif // CUSTOMITEMDELEGATE_H

customitemdelegate.cpp.-

  1. #include "customitemdelegate.h"
  2. #include <QModelIndex>
  3. #include <QStandardItemModel>
  4. #include <QStandardItem>
  5. #include <QPainter>
  6. #include <QStyleOptionButton>
  7. #include <QApplication>
  8. #include <QEvent>
  9. #include <QDebug>
  10. #include <QMouseEvent>
  11.  
  12. CustomItemDelegate::CustomItemDelegate(QObject *parent) :
  13.     QItemDelegate(parent)
  14. {
  15.     _state =  QStyle::State_Enabled;
  16. }
  17.  
  18. void CustomItemDelegate::paint(QPainter *painter,
  19.                    const QStyleOptionViewItem &option,
  20.                    const QModelIndex &index) const
  21. {
  22.    //const QStandardItemModel* model = static_cast<const QStandardItemModel*>(index.model());
  23.    //QStandardItem* item = model->item(index.row());
  24.    //QString text = item->text();
  25.  
  26.    QString text = index.data().toString();
  27.  
  28.    QRect rect = option.rect;
  29.  
  30.    //QRect textRect(rect);
  31.    //textRect.setHeight(30);
  32.    //painter->drawText(textRect,text);
  33.    painter->drawText(rect,text);
  34.  
  35.    QRect buttonRect(rect);
  36.    //buttonRect.setY(textRect.y() + 35);
  37.    //buttonRect.setY(rect.y() + 35);
  38.    buttonRect.setHeight(30);
  39.    QStyleOptionButton button;
  40.    button.rect = buttonRect;
  41.    button.text = text;
  42.    button.state = _state | QStyle::State_Enabled;
  43.  
  44.    QApplication::style()->drawControl(QStyle::CE_PushButton, &button, painter);
  45. }
  46.  
  47. QSize CustomItemDelegate::sizeHint(const QStyleOptionViewItem &/*option*/,
  48.                        const QModelIndex &/*index*/) const
  49. {
  50.     return QSize(800,70);
  51. }
  52.  
  53. bool CustomItemDelegate::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
  54. {
  55.     qDebug() << "editorEvent on row: " << index.row();
  56.     qDebug() << "editorEvent:: " << event->type();
  57.  
  58.     if( event->type() == QEvent::MouseButtonPress ||
  59.         event->type() == QEvent::MouseButtonRelease ) {
  60.     } else {
  61.          _state = QStyle::State_Raised;
  62.         return true;
  63.     }
  64.  
  65.     QRect buttonRect(option.rect);
  66.     //buttonRect.setY(option.rect.y() + 35);
  67.     buttonRect.setHeight(30);
  68.  
  69.     QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
  70.     if( !buttonRect.contains( mouseEvent->pos()) ) {
  71.         _state = QStyle::State_Raised;
  72.         return true;
  73.     }
  74.  
  75.     if( event->type() == QEvent::MouseButtonPress) {
  76.         _state = QStyle::State_Sunken;
  77.     } else if(event->type() == QEvent::MouseButtonRelease) {
  78.         _state = QStyle::State_Raised;
  79.         if(index.data().toString().contains("Update"))
  80.             emit updButtonClicked(index);
  81.         else if(index.data().toString().contains("Delete"))
  82.             emit delButtonClicked(index);
  83.         else
  84.             qDebug() << "¡¡¡ --ERROR-- !!!" << index.row();
  85.     }
  86.     return true;
  87. }

No duplicaba el ultimo botón sino que los había desplazado en la columna hacia abajo.

Gracias,
oggie

 
  ‹‹ Salida standard no hace nada      acceder antes de mostrar cn QSqlTableModel ››

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