QGridLayout與colspan和rowspan

Question

我不能創建一個像這樣的QGridLayout。

我試過，但我只用QGridLayout失敗

QGridLayout *layout = new QGridLayout; 
layout->addWidget(mytableview,0,0,1,3); 
layout->addWidget(b1,1,0,1,1,Qt::AlignRight); 
layout->addWidget(b2,1,1,1,1,Qt::AlignRight); 
layout->addWidget(b3,1,2,1,1); 
mainWindow->setLayout(layout); 

Answer 1

你不能做到這一點。對於底部區域，您需要使用QHBoxLayout並使用QHBoxLayout::addStretch來添加間距。

下面是一個例子：

widget.h：

#ifndef WIDGET_H 
#define WIDGET_H 

#include <QWidget> 

class QGridLayout; 
class QHBoxLayout; 
class QSpacerItem; 
class QPushButton; 
class QSpacerItem; 
class QPushButton; 
class QPushButton; 
class QTableView; 

class Widget : public QWidget 
{ 
    Q_OBJECT 

public: 
    explicit Widget(QWidget *parent = 0); 
    ~Widget(); 

private: 
    QGridLayout *gridLayout; 
    QHBoxLayout *horizontalLayout; 
    QSpacerItem *horizontalSpacerLeft; 
    QPushButton *pushButtonB1; 
    QSpacerItem *horizontalSpacerRight; 
    QPushButton *pushButtonB2; 
    QPushButton *pushButtonB3; 
    QTableView *tableView; 
}; 

#endif // WIDGET_H 

widget.cpp：

#include "widget.h" 

#include<QGridLayout> 
#include<QHBoxLayout> 
#include<QSpacerItem> 
#include<QPushButton> 
#include<QSpacerItem> 
#include<QPushButton> 
#include<QPushButton> 
#include<QTableView> 

Widget::Widget(QWidget *parent) : 
    QWidget(parent) 
{ 
    gridLayout = new QGridLayout(this); 
    horizontalLayout = new QHBoxLayout(); 

    horizontalLayout->addStretch(3); 

    pushButtonB1 = new QPushButton(this); 
    pushButtonB1->setText("B1"); 

    horizontalLayout->addWidget(pushButtonB1); 

    horizontalLayout->addStretch(1); 

    pushButtonB2 = new QPushButton(this); 
    pushButtonB2->setText("B2"); 

    horizontalLayout->addWidget(pushButtonB2); 

    pushButtonB3 = new QPushButton(this); 
    pushButtonB3->setText("B3"); 

    horizontalLayout->addWidget(pushButtonB3); 

    gridLayout->addLayout(horizontalLayout, 1, 0, 1, 1); 

    tableView = new QTableView(this); 

    gridLayout->addWidget(tableView, 0, 0, 1, 1); 
} 

Widget::~Widget() 
{ 
} 

main.cpp中：

#include "widget.h" 
#include <QApplication> 

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

    Widget w; 
    w.show(); 

    return a.exec(); 
} 

結果：