我在从QProduitCartoHeaderView继承的类中定义了一个自定义 header QHeaderView。
在标题中，我有一个复选框用于选中/取消选中同一列中的所有复选框
用于所有数据行。
当前，当我单击第一列的标题单元格中的任何位置(带有复选框的位置)时，
它检查标题复选框。
我想做的是仅在我单击上恰好在上时单击该复选框，并且如果我单击外部(但仍在单元格内)以对第一列进行排序，则仅选中该复选框。
我尝试过调整复选框矩形的大小(如下面的片段中的QProduitCartoHeaderView::paintSection()所示)，但是当我单击单元格中的任意位置(不在复选框上)时，我仍然将其选中。
注意:我已经设法对代码进行排序和检查。我不能做的就是检查
是单击复选框还是在单元格中的复选框之外。
这是我的自定义 header 的代码段:
#ifndef QPRODUITCARTOHEADERVIEW_H
#define QPRODUITCARTOHEADERVIEW_H
#include <QWidget>
#include <QPainter>
#include <QHeaderView>
#include <QMessageBox>
class QProduitCartoHeaderView :public QHeaderView
{
Q_OBJECT
public:
QProduitCartoHeaderView(QWidget * parent = 0);
~QProduitCartoHeaderView();
void on_sectionClicked(int logicalIndex);
bool all_first_columns_checked(int logicalIndex = 0);
bool all_first_columns_unchecked(int logicalIndex=0);
void setIsOn(bool val);
void setPasTousLesMeme(bool val);
protected:
virtual void paintSection(QPainter* poPainter, const QRect & oRect, int index) const;
virtual void mouseReleaseEvent(QMouseEvent *e);
private:
bool isOn = false, pasTousLesMeme = false;
signals:
void dataModifiedSig();
};
#endif
#ifndef QPRODUITCARTOHEADERVIEW_H
#include "QProduitCartoHeaderView.h"
#endif
#ifndef QPRODUITCARTODATAMODEL_H
#include "QProduitCartoDataModel.h"
#endif
QProduitCartoHeaderView::QProduitCartoHeaderView(QWidget* parent) : QHeaderView(Qt::Horizontal, parent)
{
}
QProduitCartoHeaderView::~QProduitCartoHeaderView()
{
}
void QProduitCartoHeaderView::setIsOn(bool val)
{
isOn = val;
}
void QProduitCartoHeaderView::setPasTousLesMeme(bool val)
{
//set if all checkboxes have different value or not
pasTousLesMeme = val;
}
void QProduitCartoHeaderView::paintSection(QPainter* poPainter, const QRect & oRect, int index) const
{
poPainter->save();
QHeaderView::paintSection(poPainter, oRect, index);
poPainter->restore();
QStyleOptionButton option;
QRect checkbox_rect = style()->subElementRect(QStyle::SE_CheckBoxIndicator, &option);
checkbox_rect.moveCenter(oRect.center());
// pour la colonne 1
if (index == 0)
{
qDebug() << checkbox_rect << " -- " << oRect;
// position
option.state = QStyle::State_Enabled | QStyle::State_Active;
option.rect = checkbox_rect;
QHeaderView::paintSection(poPainter, checkbox_rect, index);
if (isOn)
{
// on a tout coché
option.state |= QStyle::State_On;
}
else
{ // traite pas tout coché
// on rajoute le troisième état (third state)
// quand on n'a pas tout coché mais pas tout décoché non plus
if ( pasTousLesMeme )
{
option.state |= QStyle::State_NoChange;
}
else
{
// et si on a tout décoché, on décoche (isOn = false et pasTouslesMemes=false)
option.state |= QStyle::State_Off;
}
}
// on redessine alors la checkbox
this->style()->drawPrimitive(QStyle::PE_IndicatorCheckBox, &option, poPainter);
}
}
void QProduitCartoHeaderView::mouseReleaseEvent(QMouseEvent *e)
{
QHeaderView::mouseReleaseEvent(e);
}
bool QProduitCartoHeaderView::all_first_columns_checked(int logicalIndex)
{
//code to check if all first colum is checked
}
bool QProduitCartoHeaderView::all_first_columns_unchecked(int logicalIndex)
{
//code to check if all first colum is unchecked
}
void QProduitCartoHeaderView::on_sectionClicked(int logicalIndex)
{
// code pour le click du header contenant les checkboxes
QProduitCartoDataModel* the_Model = (QProduitCartoDataModel*) this->model();
if (logicalIndex == 0)
{
// on update l'état du checkbox principale (si isOn = true, la checkbox est cochée)
if (isOn)
{
// si elle est cochée, on la met à false (pour flip/flop)
isOn = false;
// mais si tout est décoché, alors, on met la checkbox à false
if (all_first_columns_unchecked(logicalIndex))
{
isOn = true;
}
}
else
{
isOn = true;
if (all_first_columns_checked(logicalIndex))
{
isOn = false;
}
}
this->update();
// fin update
int nbRow = this->model()->rowCount();
// on met tout à false si la majorité est à true
int nbTrue = 0;
if (all_first_columns_checked(logicalIndex))
{
for (int r = 0; r < nbRow; r++)
{
QModelIndex index = this->model()->index(r, logicalIndex);
the_Model->setData(index, false, Qt::CheckStateRole);
}
}
else
{
// on efface d'abord tout
for (int r = 0; r < nbRow; r++)
{
QModelIndex index = this->model()->index(r, logicalIndex);
bool checked = this->model()->data(index, Qt::DisplayRole).toBool();
if (checked)
the_Model->setData(index, false, Qt::CheckStateRole);
}
// Ensuite, on fait le flip/flop
for (int r = 0; r < nbRow; r++)
{
QModelIndex index = this->model()->index(r, logicalIndex);
// update each row of real data
the_Model->setData(index, true, Qt::CheckStateRole);
}
}
}
emit dataModifiedSig();
}
最佳答案
您可以跟踪鼠标并重新实现mousePressEvent(QMouseEvent *event)和mouseReleaseEvent(QMouseEvent *event)来确定单击该部分的位置。我在下面创建了一个示例:
myheaderview.h
#ifndef MYHEADERVIEW_H
#define MYHEADERVIEW_H
#include <QHeaderView>
class MyHeaderView : public QHeaderView
{
public:
MyHeaderView(QWidget *parent = nullptr);
QRect visualRectOfColumn(int column) const;
protected:
virtual void paintSection(QPainter *painter, const QRect &rect, int index) const;
virtual void mousePressEvent(QMouseEvent *event);
virtual void mouseReleaseEvent(QMouseEvent *event);
private:
int press_column_{-1};
bool checkbox_pressed_{false};
};
#endif // MYHEADERVIEW_H
#include "myheaderview.h"
#include <QPainter>
#include <QMouseEvent>
#include <QDebug>
MyHeaderView::MyHeaderView(QWidget *parent) : QHeaderView(Qt::Horizontal, parent)
{
this->setMouseTracking(true);
}
QRect MyHeaderView::visualRectOfColumn(int column) const
{
int x = sectionViewportPosition(column);
int y = 0;
int h = this->height();
int w = this->sectionSize(column);
return QRect(x, y, w, h);
}
void MyHeaderView::paintSection(QPainter *painter, const QRect &rect, int index) const
{
painter->save();
QHeaderView::paintSection(painter, rect, index);
painter->restore();
if (index == 0)
{
QStyleOptionButton option;
QRect checkbox_rect = style()->subElementRect(QStyle::SE_CheckBoxIndicator, &option);
checkbox_rect.moveCenter(rect.center());
option.state = QStyle::State_Enabled | QStyle::State_Active;
option.rect = checkbox_rect;
QHeaderView::paintSection(painter, checkbox_rect, index);
this->style()->drawPrimitive(QStyle::PE_IndicatorCheckBox, &option, painter);
}
}
void MyHeaderView::mousePressEvent(QMouseEvent *event)
{
press_column_ = this->visualIndexAt(event->pos().x());
if (press_column_ == -1)
{
checkbox_pressed_= false;
return QHeaderView::mousePressEvent(event);;
}
QStyleOptionButton option;
QRect checkbox_rect = style()->subElementRect(QStyle::SE_CheckBoxIndicator, &option);
checkbox_rect.moveCenter(this->visualRectOfColumn(press_column_).center());
checkbox_pressed_= checkbox_rect.contains(event->pos());
QHeaderView::mousePressEvent(event);
}
void MyHeaderView::mouseReleaseEvent(QMouseEvent *event)
{
int release_column = this->visualIndexAt(event->pos().x());
if (release_column != -1 && press_column_ == release_column)
{
if (release_column != 0)
qDebug() << "sort";
else
{
QStyleOptionButton option;
QRect checkbox_rect = style()->subElementRect(QStyle::SE_CheckBoxIndicator, &option);
checkbox_rect.moveCenter(this->visualRectOfColumn(release_column).center());
if (checkbox_pressed_&& checkbox_rect.contains(event->pos()))
qDebug() << "checkbox";
else if (!checkbox_pressed_&& !checkbox_rect.contains(event->pos()))
qDebug() << "sort";
}
}
press_column_ = -1;
checkbox_pressed_= false;
QHeaderView::mouseReleaseEvent(event);
}