Qt5开发及实例-CH404.rar,Qt5利用QPalette改变控件颜色的方法代码

#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); } 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); //(a) connect(windowComboBox,SIGNAL(activated(int)),this,SLOT(ShowWindow()));//(b) 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::ShowWindow() { //获得当前选择的颜色值 QStringList colorList = QColor::colorNames(); QColor color = QColor(colorList[windowComboBox->currentIndex()]); QPalette p = contentFrame->palette(); //(a) p.setColor(QPalette::Window,color); //(b) //把修改后的调色板信息应用到contentFrame窗体中，更新显示 contentFrame->setPalette(p); contentFrame->update(); } 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); } void Palette::fillColorList(QComboBox *comboBox) { QStringList colorList = QColor::colorNames(); //(a) QString color; //(b) foreach(color,colorList) //对颜色名列表进行遍历 { QPixmap pix(QSize(70,20)); //(c) pix.fill(QColor(color)); //为pix填充当前遍历的颜色 comboBox->addItem(QIcon(pix),NULL); //(d) comboBox->setIconSize(QSize(70,20)); //(e) comboBox->setSizeAdjustPolicy(QComboBox::AdjustToContents); //(f) } } Palette::~Palette() { }