Qt-QPalette-调色板学习

已经很久没有更新博客了，一是因为换了公司，完全是断网开发了，没有时间来写博客，最主要的就是温水煮青蛙，自己在舒适的环境中越来越懒了，最近打算强制自己更新一波。不知道能坚持多久。由于目前没有具体的Qt项目，智能更具书本内容来写博客。最为一种数据搬运和记录。本文内容来之Qt开发及实例第三版

 

QPalette类主要有两个基本概念，一个是ColorGroup，另一个是ColorRole。其中ColorGroup指的是一下三种不同的状态
1. QPalette::Active: 获得焦点的状态
2. QPalette::Inactive: 未获得焦点的状态
3. QPalette::Disable:不可用状态
其中Active和Inactive状态在通常情况下，颜色显示是一致的。也可以根据需求设置为不一样的颜色。

ColorRole指的是颜色的主题，即对窗体中不同部位颜色的分类。例如QPalette::Window是指背景色QPalette::WindowText指的是前景色，等等。

下面是运行代码截图

下面是源代码分享
palette.h

#ifndef PALETTE_H
#define PALETTE_H

#include <QDialog>
#include <QComboBox>
#include <QLabel>
#include <QTextEdit>
#include <QPushButton>
#include <QLineEdit>
class Palette : public QDialog
{
    Q_OBJECT

public:
    Palette(QWidget *parent = 0);
    ~Palette();
    void createCtrlFrame();			//完成窗体左半部分颜色选择区的创建
    void createContentFrame();		//完成窗体右半部分的创建
    void fillColorList(QComboBox *comboBox);
    //完成向颜色下拉列表框中插入颜色的工作
private slots:
    void ShowWindow();
    void ShowWindowText();
    void ShowButton();
    void ShowButtonText();
    void ShowBase();
private:
    QFrame *ctrlFrame;                  //颜色选择面板

    QLabel *windowLabel;
    QComboBox *windowComboBox;

    QLabel *windowTextLabel;
    QComboBox *windowTextComboBox;

    QLabel *buttonLabel;
    QComboBox *buttonComboBox;

    QLabel *buttonTextLabel;
    QComboBox *buttonTextComboBox;

    QLabel *baseLabel;
    QComboBox *baseComboBox;

    QFrame *contentFrame;              	//具体显示面板

    QLabel *label1;
    QComboBox *comboBox1;

    QLabel *label2;
    QLineEdit *lineEdit2;

    QTextEdit *textEdit;
    QPushButton *OkBtn;
    QPushButton *CancelBtn;
};

#endif // PALETTE_H

 

 

palette.cpp

#include "palette.h"
#include <QHBoxLayout>
#include <QGridLayout>
Palette::Palette(QWidget *parent)
    : QDialog(parent)
{
    createCtrlFrame();
    createContentFrame();
    QHBoxLayout *mainLayout =new QHBoxLayout(this);
    mainLayout->addWidget(ctrlFrame);
    mainLayout->addWidget(contentFrame);
}

Palette::~Palette()
{

}

void Palette::createCtrlFrame()
{
    ctrlFrame =new QFrame;                  //颜色选择面板
    windowLabel =new QLabel(tr("QPalette::Window: "));
    windowComboBox =new QComboBox;			//创建一个QComboBox对象
    fillColorList(windowComboBox);
    connect(windowComboBox,SIGNAL(activated(int)),this,SLOT(ShowWindow()));
    windowTextLabel =new QLabel(tr("QPalette::WindowText: "));
    windowTextComboBox =new QComboBox;
    fillColorList(windowTextComboBox);
    connect(windowTextComboBox,SIGNAL(activated(int)),this,SLOT(ShowWindowText()));
    buttonLabel =new QLabel(tr("QPalette::Button: "));
    buttonComboBox =new QComboBox;
    fillColorList(buttonComboBox);
    connect(buttonComboBox,SIGNAL(activated(int)),this,SLOT(ShowButton()));
    buttonTextLabel =new QLabel(tr("QPalette::ButtonText: "));
    buttonTextComboBox =new QComboBox;
    fillColorList(buttonTextComboBox);
    connect(buttonTextComboBox,SIGNAL(activated(int)),this,SLOT(ShowButtonText()));
    baseLabel =new QLabel(tr("QPalette::Base: "));
    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(windowTextComboBox,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;                	//具体显示面板
    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("确认"));
    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::fillColorList(QComboBox *comboBox)
{
    QStringList colorList = QColor::colorNames();
    QString color;
    foreach(color,colorList)
    {
        QPixmap pix(QSize(70,20));
        pix.fill(QColor(color));
        comboBox->addItem(QIcon(pix),NULL);
        comboBox->setIconSize(QSize(70,20));
        comboBox->setSizeAdjustPolicy(QComboBox::AdjustToContents);
        //(f)
    }
}
/*
 * 用于响应对背景颜色的选择
 */
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();
}
/*
 * 用于响应对应文字颜色的选择
 */
void Palette::ShowWindowText()
{

    QStringList colorList = QColor::colorNames();
    QColor color = colorList[windowTextComboBox->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);
}

工程连接：https://gitee.com/DreamLife-Technology_DreamLife/Palette