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
