있어 뭔가 ...
/*
* Subclass of QTableView that provides notification when the mouse cursor
* enters/leaves a column boundary.
*/
class headerless_table_view: public QTableView {
using super = QTableView;
public:
explicit headerless_table_view (QWidget *parent = nullptr)
: super(parent)
, m_boundary_width(10)
, m_column_index(-1)
{
viewport()->setMouseTracking(true);
viewport()->installEventFilter(this);
}
/*
* @return The index of the column whose right hand boundary the cursor lies
* on or -1 if not on a boundary.
*/
int column_index() const
{
return(m_column_index);
}
protected:
virtual bool eventFilter (QObject *obj, QEvent *event) override
{
if (event->type() == QEvent::MouseMove) {
if (auto *e = dynamic_cast<QMouseEvent *>(event)) {
auto col_left = columnAt(e->pos().x() - m_boundary_width/2);
auto col_right = columnAt(e->pos().x() + m_boundary_width/2);
bool was_on_boundary = m_column_index != -1;
if (col_left != col_right) {
if (m_column_index == -1) {
if (col_left != -1) {
m_column_index = col_left;
}
}
} else {
m_column_index = -1;
}
bool is_on_boundary = m_column_index != -1;
if (is_on_boundary != was_on_boundary) {
entered_column_boundary(is_on_boundary);
}
}
}
return(super::eventFilter(obj, event));
}
/*
* Called whenever the cursor enters or leaves a column boundary. if
* `entered' is true then the index of the column can be obtained using
* `column_index()'.
*/
virtual void entered_column_boundary (bool entered)
{
}
private:
int m_boundary_width;
int m_column_index;
};
/*
* Subclass of headerless_table_view that allows resizing of columns.
*/
class resizable_headerless_table_view: public headerless_table_view {
using super = headerless_table_view;
public:
explicit resizable_headerless_table_view (QWidget *parent = nullptr)
: super(parent)
, m_dragging(false)
{
viewport()->installEventFilter(this);
}
protected:
virtual bool eventFilter (QObject *obj, QEvent *event) override
{
if (auto *e = dynamic_cast<QMouseEvent *>(event)) {
if (event->type() == QEvent::MouseButtonPress) {
if (column_index() != -1) {
m_mouse_pos = e->pos();
m_dragging = true;
return(true);
}
} else if (event->type() == QEvent::MouseButtonRelease) {
m_dragging = false;
} else if (event->type() == QEvent::MouseMove) {
if (m_dragging) {
int delta = e->pos().x() - m_mouse_pos.x();
setColumnWidth(column_index(), columnWidth(column_index()) + delta);
m_mouse_pos = e->pos();
return(true);
}
}
}
return(super::eventFilter(obj, event));
}
/*
* Override entered_column_boundary to update the cursor sprite when
* entering/leaving a column boundary.
*/
virtual void entered_column_boundary (bool entered) override
{
if (entered) {
m_cursor = viewport()->cursor();
viewport()->setCursor(QCursor(Qt::SplitHCursor));
} else {
viewport()->setCursor(m_cursor);
}
}
private:
bool m_dragging;
QPoint m_mouse_pos;
QCursor m_cursor;
};
나는 두 개의 클래스를 통해 그것을 분할 끝났다.
어쨌든, 이전의 예제 코드에서 QTableView
을 resizable_headerless_table_view
으로 바꾸는 것만으로도 원하는 결과를 얻은 것으로 보입니다. 마우스를 열 경계 위로 이동하고 관련 경계를 끌면 커서 스프라이트가 변경됩니다.
가 필요하시면 얼마나 가까운 확실하지,하지만 ...이
아마 솔루션은 ResizeColumnsToContents''모든 컬럼의 크기를 조절하는 버튼을 추가하는 것입니다. –