Qt QPalette测试

效果：

.h

#ifndef PALETTE_H
#define PALETTE_H

#include <QDialog>
#include <QComboBox>
#include <QLabel>
#include <QTextEdit>
#include <QPushButton>
#include <QLineEdit>

QT_BEGIN_NAMESPACE
namespace Ui { class Palette; }
QT_END_NAMESPACE

class Palette : public QDialog
{
    Q_OBJECT
public:
    Palette(QWidget *parent = nullptr);
    ~Palette();
    void createCtrlFrame();
    void createContentFrame();
    void fillColorList(QComboBox *);
private slots:
    void ShowWindow();
    void ShowWindowText();
    void ShowButton();
    void ShowButtonText();
    void ShowBase()

private:
    Ui::Palette *ui;
    QFrame *ctrlFrame;
    QLabel *windowLabel;
    QComboBox *windowComboBox;
    QLabel *windowTextLabel;
    QComboBox *windowTextComBox;
    QLabel *buttonLabel;
    QComboBox *buttonComboBox;
    QLabel *buttonTextLabel;
    QComboBox *buttonTextComboBox;
    QLabel *baseLabel;
    QComboBox *baseComboBox;
    QFrame *contentFrame;
    QLabel *label1;
    QComboBox *comboBox1;
    QLabel *label2;
    QLineEdit *lineEdit2;
    QTextEdit *textEdit;
    QPushButton *okBtn;
    QPushButton *cancelBtn;
};
#endif // PALETTE_H

.cpp

#include "palette.h"
#include "ui_palette.h"
#include <QHBoxLayout>
#include <QGridLayout>

Palette::Palette(QWidget *parent)
    : QDialog(parent)
    , ui(new Ui::Palette)
{
    ui->setupUi(this);

    createCtrlFrame();
    createContentFrame();
    QHBoxLayout *mainLayout = new QHBoxLayout(this);
    mainLayout->addWidget(ctrlFrame);
    mainLayout->addWidget(contentFrame);
}

Palette::~Palette()
{
    delete ui;
}

void Palette::createCtrlFrame()
{
    ctrlFrame = new QFrame;

    windowLabel = new QLabel(tr("窗口颜色板："));
    windowComboBox = new QComboBox;
    fillColorList( windowComboBox);
    connect(windowComboBox, SIGNAL(activated(int)), this, SLOT(ShowWindow()));

    windowTextLabel = new QLabel(tr("窗口字体颜色板："));
    windowTextComBox = new QComboBox;
    fillColorList(windowTextComBox);
    connect(windowTextComBox, SIGNAL(activated(int)), this, SLOT(ShowWindowText()));

    buttonLabel = new QLabel(tr("按键颜色板： "));
    buttonComboBox = new QComboBox;
    fillColorList(buttonComboBox);
    connect(buttonComboBox, SIGNAL(activated(int)), this, SLOT(ShowButton()));

    buttonTextLabel = new QLabel(tr("按键字体颜色板： "));
    buttonTextComboBox = new QComboBox;
    fillColorList(buttonTextComboBox);
    connect(buttonTextComboBox, SIGNAL(activated(int)), this, SLOT(ShowButtonText()));

    baseLabel = new QLabel(tr("基础颜色板： "));
    baseComboBox = new QComboBox;
    fillColorList(baseComboBox);
    connect(baseComboBox, SIGNAL(activated(int)), this, SLOT(ShowBase()));

    QGridLayout *mainLayout = new QGridLayout(ctrlFrame);
    mainLayout->setSpacing(20);
    mainLayout->addWidget(windowLabel, 0, 0);
    mainLayout->addWidget(windowComboBox, 0, 1);
    mainLayout->addWidget(windowTextLabel, 1, 0);
    mainLayout->addWidget(windowTextComBox, 1, 1);
    mainLayout->addWidget(buttonLabel, 2, 0);
    mainLayout->addWidget(buttonComboBox, 2, 1);
    mainLayout->addWidget(buttonTextLabel, 3, 0);
    mainLayout->addWidget(buttonTextComboBox, 3, 1);
    mainLayout->addWidget(baseLabel, 4, 0);
    mainLayout->addWidget(baseComboBox, 4, 1);

}


void Palette::createContentFrame()
{
    contentFrame = new QFrame;
    label1 = new QLabel(tr("请选择一个值："));
    comboBox1 = new QComboBox;
    label2 = new QLabel(tr("请输入字符串："));
    lineEdit2 = new QLineEdit;
    textEdit = new QTextEdit;
    QGridLayout *topLayout = new QGridLayout;
    topLayout->addWidget(label1,0,0);
    topLayout->addWidget(comboBox1,0,1);
    topLayout->addWidget(label2,1,0);
    topLayout->addWidget(lineEdit2,1,1);
    topLayout->addWidget(textEdit,2,0,1,2);
    okBtn = new QPushButton(tr("確認"));
    cancelBtn = new QPushButton(tr("取消"));
    QHBoxLayout *bottomLayout = new QHBoxLayout;
    bottomLayout->addStretch(1);
    bottomLayout->addWidget(okBtn);
    bottomLayout->addWidget(cancelBtn);

    QVBoxLayout *mainLayout = new QVBoxLayout(contentFrame);
    mainLayout->addLayout(topLayout);
    mainLayout->addLayout(bottomLayout);
}

void Palette::ShowWindow()
{
    QStringList colorList = QColor::colorNames();
    QColor color = QColor(colorList[windowComboBox->currentIndex()]);
    QPalette p = contentFrame->palette();
    p.setColor(QPalette::Window, color);
    contentFrame->setPalette(p);
    contentFrame->update();
}

void Palette::ShowWindowText()
{
    QStringList colorList = QColor::colorNames();
    QColor color = colorList[windowTextComBox->currentIndex()];
    QPalette p = contentFrame->palette();
    p.setColor(QPalette::WindowText, color);
    contentFrame->setPalette(p);
}

void Palette::ShowButton()
{
    QStringList colorList = QColor::colorNames();
    QColor color = QColor(colorList[buttonComboBox->currentIndex()]);
    QPalette p = contentFrame->palette();
    p.setColor(QPalette::Button, color);
    contentFrame->setPalette(p);
    contentFrame->update();
}

void Palette::ShowButtonText()
{
    QStringList colorList = QColor::colorNames();
    QColor color = QColor(colorList[buttonTextComboBox->currentIndex()]);
    QPalette p = contentFrame->palette();
    p.setColor(QPalette::ButtonText, color);
    contentFrame->setPalette(p);
}

void Palette::ShowBase()
{
    QStringList colorList = QColor::colorNames();
    QColor color = QColor(colorList[baseComboBox->currentIndex()]);
    QPalette p = contentFrame->palette();
    p.setColor(QPalette::Base, color);
    contentFrame->setPalette(p);
}


void Palette::fillColorList(QComboBox * comb)
{
    QStringList colorList = QColor::colorNames();
    QString color;
    foreach (color, colorList) {
        QPixmap pix(QSize(70,20));
        pix.fill(QColor(color));
        comb->addItem(QIcon(pix), NULL);
        comb->setIconSize(QSize(70,20));
        comb->setSizeAdjustPolicy(QComboBox::AdjustToContents);
    }
}

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