Qtableview mouse move

charry · 1 Nov 2020, 00:49

the picture is I use QStyledItemDelegate when mouse move table cell size.

Pl45m4 · 1 Nov 2020, 00:57

@charry

What do you want to tell us with this? There is no question in your post.

charry · P Pl45m4 1 Nov 2020, 00:49

@Pl45m4 Drag the mouse to change the spacing of the table, but it will produce a shadow for QStyledItemDelegate

Christian Ehrlicher · 2 Nov 2020, 00:51

@charry said in Qtableview mouse move:

but it will produce a shadow for QStyledItemDelegate

And what's the question now? How should we know what you're doing? Esp. when there is no code at all?

charry · wrote on 2 Nov 2020, 00:37

#pragma once
#include <QApplication>
#include <QTableView>
#include <QStandardItemModel>
#include <QStyledItemDelegate>
#include <QHeaderView>
#include <QPushButton>
#include <QStyleOptionViewItem>

class TailButtonsDelegate : public QStyledItemDelegate
{
Q_OBJECT
Q_DISABLE_COPY(TailButtonsDelegate)

public:
explicit TailButtonsDelegate(QObject *parent = Q_NULLPTR);
~TailButtonsDelegate();

void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const Q_DECL_OVERRIDE;

QSize sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const Q_DECL_OVERRIDE;

QWidget* createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const Q_DECL_OVERRIDE;

void setEditorData(QWidget* editor, const QModelIndex& index) const Q_DECL_OVERRIDE;

void setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const Q_DECL_OVERRIDE;

void updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem& option, const QModelIndex& index) const Q_DECL_OVERRIDE;

bool editorEvent(QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option, const QModelIndex& index) Q_DECL_OVERRIDE;

};

#include "TailButtonsDelegate.h"
#include <QMouseEvent>

TailButtonsDelegate::TailButtonsDelegate(QObject* parent)
: QStyledItemDelegate(parent)
{

}

TailButtonsDelegate::~TailButtonsDelegate()
{
}

void TailButtonsDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const {
Q_ASSERT(index.isValid());
QStyleOptionViewItem opt = option;
initStyleOption(&opt, index);
const QWidget* widget = option.widget;
QStyle* style = widget ? widget->style() : QApplication::style();
style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, widget);
if (!(option.state & QStyle::State_Selected))
return;
QStyleOptionButton editButtonOption;
editButtonOption.text = QString(QChar(0x270D)); //use emoji for text, optionally you can use icon + iconSize
editButtonOption.rect = QRect(option.rect.left() + option.rect.width() - (2 * option.rect.height()), option.rect.top(), option.rect.height(), option.rect.height());
editButtonOption.features = QStyleOptionButton::None;
editButtonOption.direction = option.direction;
editButtonOption.fontMetrics = option.fontMetrics;
editButtonOption.palette = option.palette;
editButtonOption.styleObject = option.styleObject;
QStyleOptionButton removeButtonOption(editButtonOption);
removeButtonOption.text = QString(QChar(0x274C)); //use emoji for text, optionally you can use icon + iconSize
removeButtonOption.rect = QRect(option.rect.left() + option.rect.width() - option.rect.height(), option.rect.top(), option.rect.height(), option.rect.height());
style->drawControl(QStyle::CE_PushButton, &editButtonOption, painter, widget);
style->drawControl(QStyle::CE_PushButton, &removeButtonOption, painter, widget);

//	QStyledItemDelegate::paint(painter, option, index);

}

QSize TailButtonsDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const {
const QSize baseSize = QStyledItemDelegate::sizeHint(option, index);
return QSize(baseSize.width() + (2 * baseSize.height()), baseSize.height());
}

QWidget* TailButtonsDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const {
QWidget* result = new QWidget(parent);
result->setGeometry(option.rect);
result->setStyleSheet("background:white;");

QWidget* baseEditor = QStyledItemDelegate::createEditor(result, option, index);
baseEditor->setObjectName("baseEditor");
baseEditor->setStyleSheet("border: none;");

baseEditor->setGeometry(0, 0, option.rect.width() - (2 * option.rect.height()), option.rect.height());
QPushButton* editButton = new QPushButton(QChar(0x270D), result);
editButton->setObjectName("editButton");
editButton->setGeometry(option.rect.width() - (2 * option.rect.height()), 0, option.rect.height(), option.rect.height());
connect(editButton, &QPushButton::clicked, []() {qDebug("Edit"); });
QPushButton* removeButton = new QPushButton(QChar(0x274C), result);
removeButton->setObjectName("removeButton");
removeButton->setGeometry(option.rect.width() - option.rect.height(), 0, option.rect.height(), option.rect.height());
connect(removeButton, &QPushButton::clicked, []() {qDebug("Remove"); });

return result;

}

void TailButtonsDelegate::setEditorData(QWidget* editor, const QModelIndex& index) const {
QWidget* baseEditor = editor->findChild<QWidget*>("baseEditor");
Q_ASSERT(baseEditor);
QStyledItemDelegate::setEditorData(baseEditor, index);
}

void TailButtonsDelegate::setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const {
QWidget* baseEditor = editor->findChild<QWidget*>("baseEditor");
Q_ASSERT(baseEditor);
QStyledItemDelegate::setModelData(baseEditor, model, index);
}

void TailButtonsDelegate::updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem& option, const QModelIndex& index) const {
Q_UNUSED(index)
editor->setGeometry(option.rect);
QWidget* baseEditor = editor->findChild<QWidget*>("baseEditor");
Q_ASSERT(baseEditor);
baseEditor->setGeometry(0, 0, option.rect.width() - (2 * option.rect.height()), option.rect.height());
QWidget* editButton = editor->findChild<QWidget*>("editButton");
Q_ASSERT(editButton);
editButton->setGeometry(option.rect.width() - (2 * option.rect.height()), 0, option.rect.height(), option.rect.height());
QWidget* removeButton = editor->findChild<QWidget*>("removeButton");
Q_ASSERT(removeButton);
removeButton->setGeometry(option.rect.width() - option.rect.height(), 0, option.rect.height(), option.rect.height());
editor->setGeometry(option.rect);
}

bool TailButtonsDelegate::editorEvent(QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option, const QModelIndex& index)
{
switch (event->type())
{
case QEvent::MouseButtonRelease:
{
QMouseEvent* pME = static_cast<QMouseEvent*>(event);
if (pME->button() == Qt::LeftButton)
{
QAbstractItemView* pView = qobject_cast<QAbstractItemView*>(const_cast<QWidget*>(option.widget));
if (pView != nullptr)
{
pView->findChild<QWidget*>("baseEditor")->setFocus();

			//	pView->currentIndex();
		//		pView->findChild<QWidget*>("editButton")->setStyleSheet("background:white;");
		//		pView->findChild<QWidget*>("removeButton")->setStyleSheet("background:white;");
		}
		//		return true;
	}
}
case QEvent::MouseMove:
{
	QAbstractItemView* pView = qobject_cast<QAbstractItemView*>(const_cast<QWidget*>(option.widget));
	if (pView != nullptr)
	{
		
//		pView->findChild<QWidget*>("baseEditor")->clearFocus();
	}
}
default:
	break;
}

return QStyledItemDelegate::editorEvent(event, model, option, index);

}

#include <QtCore/QCoreApplication>
#include "TailButtonsDelegate.h"
#include <QTableWidgetItem>

int main(int argc, char *argv[])
{
// QCoreApplication a(argc, argv);

// return a.exec();

QApplication app(argc, argv); 

QStandardItemModel baseModel;
baseModel.insertRows(0, 20);
baseModel.insertColumns(0, 4);
for (int i = 0; i < 20; ++i) {
    for (int j = 0; j < 4; ++j) {
        baseModel.setData(baseModel.index(i, j), QStringLiteral("%1,%2").arg(i).arg(j));
    }
}



QTableView view;

QPalette palette = view.palette();
palette.setBrush(QPalette::Highlight, QColor(0, 120, 215));
palette.setBrush(QPalette::HighlightedText, QBrush(Qt::black));
palette.setBrush(QPalette::Shadow, QBrush(Qt::transparent));
view.setPalette(palette);

view.setModel(&baseModel);

view.setEditTriggers(QTableView::AllEditTriggers);

view.setSelectionMode(QAbstractItemView::SingleSelection);

// view.setSelectionBehavior(QTableView::SelectItems);
view.setSelectionBehavior(QTableView::SelectRows);

view.horizontalHeader()->setStretchLastSection(true);
view.setItemDelegateForColumn(3, new TailButtonsDelegate(&view));

view.resize(800,600);

view.show();
return app.exec();

}

charry · wrote on 2 Nov 2020, 00:51

@Christian-Ehrlicher sorry,I not englisher. my problem: Click the fourth column and drag the mouse to change the spacing of the table, the window is not paint in time

Christian Ehrlicher · wrote on 2 Nov 2020, 06:07

Please take a look at your post above - do you really think we can read something meaningful out of it. Please use the <code> - tags to make it more readable and reduce your code as much as possible so only the problem and nothing else is in there.