QBoxLayout composition

kirsanov

One of widgets (playground) is invisible:
@ QHBoxLayout *colLayout = new QHBoxLayout;
colLayout->addWidget(colLabel);
colLayout->addWidget(colSlider);
colLayout->addWidget(colSpinBox);

QHBoxLayout *rowLayout = new QHBoxLayout;
rowLayout->addWidget(rowLabel);
rowLayout->addWidget(rowSlider);
rowLayout->addWidget(rowSpinBox);

QHBoxLayout *genIntevalLayout = new QHBoxLayout;
genIntevalLayout->addWidget(genIntervalSlider);
genIntevalLayout->addWidget(genIntervalLineEdit);

QVBoxLayout *editLayout = new QVBoxLayout;
editLayout->addWidget(sizeLabel, 0, Qt::AlignCenter);
editLayout->addLayout(colLayout);
editLayout->addLayout(rowLayout);
editLayout->addWidget(genIntervalLabel, 0, Qt::AlignCenter);
editLayout->addLayout(genIntevalLayout);
editLayout->addStretch();
editLayout->addLayout(buttonLayout);

QHBoxLayout *mainLayout = new QHBoxLayout;
mainLayout->addWidget(playground);
mainLayout->addLayout(editLayout);

QWidget *mainWidget = new QWidget;
mainWidget->setLayout(mainLayout);

setCentralWidget(mainWidget);

@

Please tell me, where is my mistake.

ChrisW67

What is playground? Does it have a reasonable size hint and/or minimum size?

kirsanov

it's widget's son
here is the code:
@class Playground : public QWidget {
Q_OBJECT

public:
Playground();
int cols(){return colCount;}
int rows(){return rowCount;}
private:
int colCount;
int rowCount;
int interval;
bool **table;
QColor lineColor;
QColor rectColor;
QTimer *timer;

void paintEvent(QPaintEvent *);
void mousePressEvent(QMouseEvent *event);
void drawTable(QPainter &painter);
void drawWorld(QPainter &painter);

private slots:
void newGeneration();
void startGame();
void pauseGame();
void resetGame();
signals:
void gameOver();
public:
bool isActive();
};@

kirsanov

ok, i solved this problem? by adding @setMinimumSize(rowCount3, colCount3);@ into the constructor of the Playground.
Thank you)

kirsanov

but how can I fix width of the sideLayout?