Qt：标准颜色对话框类QColorDialog选择某种颜色-蒲公英云

Qt：标准颜色对话框类QColorDialog选择某种颜色

1、新建”QT GUI”，基类选择”QDialog’，取消“创建界面”

2、dialog.cpp中：

#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
#include <QPushButton>
#include <QFrame>
#include <QGridLayout>
class Dialog : public QDialog
{
    Q_OBJECT
public:
    Dialog(QWidget *parent = 0);
    ~Dialog();
private:   //私有变量声明
    QPushButton *colorBtn;
    QFrame *colorFrame;
    QGridLayout *mainLayout;
private slots:
    void showColor();
};
#endif // DIALOG_H

3、dialog.cpp中

#include "dialog.h"
#include <QGridLayout>
#include <QColorDialog>
Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
{
    colorBtn = new QPushButton;
    //控件初始化
    colorBtn->setText(tr("颜色标准对话框"));
    colorFrame = new QFrame;
    colorFrame->setFrameShape(QFrame::Box);
    colorFrame->setAutoFillBackground(true);
    //布局管理
    mainLayout = new QGridLayout(this);
    mainLayout->addWidget(colorBtn, 1, 0);
    mainLayout->addWidget(colorFrame, 1, 1);
    //
    connect(colorBtn, SIGNAL(clicked()), this, SLOT(showColor()));
}
Dialog::~Dialog()
{
}
void Dialog::showColor()
{
    QColor c = QColorDialog::getColor(Qt::blue);
    if(c.isValid()){
        colorFrame->setPalette(QPalette(c));
    }
}