QPalette调色板类
QT提供的调色板类QPalette专门用于管理部件外观显示，相当于部件或对话框的调色板，管理他们所有的颜色信息。每个部件都包含一个QPalette对象，在显示时，按照它的QPalette对象中对各部分各状态下的颜色的描述进行绘制。
dialog.cpp
#include "dialog.h"
Dialog::Dialog(QWidget *parent)
: QDialog(parent)
{
createCtrlFrame();
createContentFrame();
QHBoxLayout *mainLayout = new QHBoxLayout(this);
mainLayout->addWidget(m_ctrlFrame);
mainLayout->addWidget(m_contentFrame);
}
Dialog::~Dialog()
{
}
void Dialog::createCtrlFrame()
{
m_ctrlFrame = new QFrame;
m_ctrlFrame->setFrameStyle(QFrame::Sunken | QFrame::Box);
m_windowLabel = new QLabel("QPalette::Window:");
m_windowComboBox = new QComboBox;
fillColorList(m_windowComboBox);
connect(m_windowComboBox,SIGNAL(activated(int)),this,SLOT(ShowWindow(int)));//根据选择颜色给窗体设置颜色
m_windowTextLabel = new QLabel("QPalette::WindowText");
m_windowTextComboBox = new QComboBox;
fillColorList(m_windowTextComboBox);
//选中时发送信号
connect(m_windowTextComboBox,SIGNAL(activated(int)),this,SLOT(ShowWindowText(int)));
m_buttonLabel = new QLabel("QPalette::Button");
m_buttonCombox = new QComboBox;
fillColorList(m_buttonCombox);
connect(m_buttonCombox,SIGNAL(activated(int)),this,SLOT(ShowButton(int)));
m_buttonTextLabel = new QLabel("QPalette::ButtonText");
m_buttonTextComboBox = new QComboBox;
fillColorList(m_buttonTextComboBox);
connect(m_buttonTextComboBox,SIGNAL(activated(int)),this,SLOT(ShowButtonText(int)));
m_baseLabel = new QLabel("QPalette::Base");
m_baseComboBox = new QComboBox;
fillColorList(m_baseComboBox);
connect(m_baseComboBox,SIGNAL(activated(int)),this,SLOT(ShowBase(int)));
//布局
QGridLayout *mainLayout = new QGridLayout(m_ctrlFrame);
mainLayout->setSpacing(20);
mainLayout->addWidget(m_windowLabel,0,0);
mainLayout->addWidget(m_windowComboBox,0,1);
mainLayout->addWidget(m_windowTextLabel,1,0);
mainLayout->addWidget(m_windowTextComboBox,1,1);
mainLayout->addWidget(m_buttonLabel,2,0);
mainLayout->addWidget(m_buttonCombox,2,1);
mainLayout->addWidget(m_buttonTextLabel,3,0);
mainLayout->addWidget(m_buttonTextComboBox,3,1);
mainLayout->addWidget(m_baseLabel,4,0);
mainLayout->addWidget(m_baseComboBox,4,1);
}
void Dialog::createContentFrame()
{
m_contentFrame = new QFrame;
m_contentFrame->setAutoFillBackground(true);
m_label1 = new QLabel("请输入一个值");
m_label2 = new QLabel("请输入字符串");
m_comboBox1 = new QComboBox;
m_lineEdit = new QLineEdit;
m_textEdit = new QTextEdit;
m_okBtn = new QPushButton(QString("确认"));
m_cancelBtn = new QPushButton(QString("取消"));
m_okBtn->setAutoFillBackground(true);
QGridLayout *topLayout = new QGridLayout;
topLayout->addWidget(m_label1,0,0);
topLayout->addWidget(m_comboBox1,0,1);
topLayout->addWidget(m_label2,1,0);
topLayout->addWidget(m_lineEdit,1,1);
topLayout->addWidget(m_textEdit,2,0,1,2);
QHBoxLayout *bottomLayout = new QHBoxLayout;
bottomLayout->addWidget(m_okBtn);
bottomLayout->addWidget(m_cancelBtn);
QVBoxLayout *mainLayout = new QVBoxLayout(m_contentFrame);
mainLayout->addLayout(topLayout);
mainLayout->addLayout(bottomLayout);
}
void Dialog::fillColorList(QComboBox *comboBox)
{
QStringList colorList = QColor::colorNames();//获取所有颜色
QString color;
foreach (color, colorList)
{
QPixmap pix(QSize(70,20));//下拉框尺寸
pix.fill(QColor(color));
comboBox->addItem(QIcon(pix),NULL);//下拉菜单添加选项
comboBox->setIconSize(QSize(70,20));
comboBox->setSizeAdjustPolicy(QComboBox::AdjustToContents);//根据内容适应尺寸
}
}
void Dialog::ShowWindow(int index)
{
QStringList colorList = QColor::colorNames();
QColor color = QColor(colorList[index]);//获取用户选择的颜色
QPalette p = m_contentFrame->palette();//获取调色板
p.setColor(QPalette::Window,color);
m_contentFrame->setPalette(p);//设置调色板
m_contentFrame->update();//刷新
}
void Dialog::ShowWindowText(int index)
{
//找到颜色，获取调色板，设置调色板对指定位置颜色进行修改，刷新。
QStringList colorList = QColor::colorNames();
QColor color = QColor(colorList[index]);
QPalette p = m_contentFrame->palette();
p.setColor(QPalette::WindowText,color);
m_contentFrame->setPalette(p);
m_contentFrame->update();
}
void Dialog::ShowButton(int index)
{
QStringList colorList = QColor::colorNames();
QColor color = QColor(colorList[index]);
QPalette p = m_contentFrame->palette();
p.setColor(QPalette::Button,color);
m_contentFrame->setPalette(p);
m_contentFrame->update();
}
void Dialog::ShowButtonText(int index)
{
QStringList colorList = QColor::colorNames();
QColor color = QColor(colorList[index]);
QPalette p = m_contentFrame->palette();
p.setColor(QPalette::ButtonText,color);
m_contentFrame->setPalette(p);
m_contentFrame->update();
}
void Dialog::ShowBase(int index)
{
QStringList colorList = QColor::colorNames();
QColor color = QColor(colorList[index]);
QPalette p = m_contentFrame->palette();
p.setColor(QPalette::Base,color);
m_contentFrame->setPalette(p);
m_contentFrame->update();
}
dialog.h
#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
#include<QFrame>
#include<QLabel>
#include<QComboBox>
#include<QTextEdit>
#include<QGridLayout>
#include<QLineEdit>
#include<QPushButton>
class Dialog : public QDialog
{
Q_OBJECT
public:
Dialog(QWidget *parent = 0);
~Dialog();
void createCtrlFrame();
void createContentFrame();
void fillColorList(QComboBox* comboBox);//给组合框添加颜色列表
public slots:
void ShowWindow(int index);
void ShowWindowText(int index);
void ShowButton(int index);
void ShowButtonText(int index);
void ShowBase(int index);
private:
QFrame *m_ctrlFrame;
QLabel *m_windowLabel;
QComboBox*m_windowComboBox;
QLabel *m_windowTextLabel;
QComboBox *m_windowTextComboBox;
QLabel *m_buttonLabel;
QComboBox * m_buttonCombox;
QLabel* m_buttonTextLabel;
QComboBox* m_buttonTextComboBox;
QLabel* m_baseLabel;
QComboBox *m_baseComboBox;
QFrame* m_contentFrame;
QLabel* m_label1;
QLabel* m_label2;
QComboBox* m_comboBox1;
QLineEdit* m_lineEdit;
QTextEdit* m_textEdit;
QPushButton* m_okBtn;
QPushButton* m_cancelBtn;
};
#endif // DIALOG_H
上述代码中调色板是如何知道指定位置代表的是什么内容？
WindowText,Button…等已经在QT内声明好了。
enum ColorRole { WindowText, Button, Light, Midlight, Dark, Mid,
Text, BrightText, ButtonText, Base,Window, Shadow,
Highlight, HighlightedText,
Link, LinkVisited,
AlternateBase,
NoRole,
ToolTipBase, ToolTipText,
NColorRoles = ToolTipText + 1,
Foreground = WindowText, Background = Window
};
相比较起来样式表功能更加强大，如果要实现的颜色效果不是很复杂，可以使用调色板。
