Qt设置另一个类的按钮颜色

我已经花了几天的时间来完成这个任务，但是我尝试过的每个解决方案都不起作用。Qt设置另一个类的按钮颜色

我有colorPicker选择颜色。 ColorPicker是一个类。我在另一个叫做ToolWindow的类中有按钮。在类ColorPicker中选择颜色后，我想在类ToolWindow中更改按钮的颜色。

下面是一些代码：

toolWindow.h

#ifndef TOOLWINDOW_H 
#define TOOLWINDOW_H 

#include <QDialog> 
#include "colorpicker.h" 
//#include "mainwindow.h" 

namespace Ui { 
class ToolWindow; 
} 

class ToolWindow : public QDialog 
{ 
    Q_OBJECT 

public: 
    explicit ToolWindow(QWidget *parent = 0); 
    ~ToolWindow(); 
void setColor(QColor color); 


private slots: 
    void on_penTool_clicked(); 
    void on_rectTool_clicked(); 
    void on_selectTool_clicked(); 
    void on_circleTool_clicked(); 
    void on_lineTool_clicked(); 
    void on_colorButton_clicked(); 

private: 
    Ui::ToolWindow *ui; 
    ColorPicker colorPicker; 
    QColor nColor; 

}; 

#endif // TOOLWINDOW_H

toolWindow.cpp

#include "toolwindow.h" 
#include "ui_toolwindow.h" 
#include "colorpicker.h" 
#include "mainwindow.h" 

#include <QMouseEvent> 

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

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

void ToolWindow::on_penTool_clicked() 
{ 
    mSelection = 1; 
} 

void ToolWindow::on_rectTool_clicked() 
{ 
    mSelection = 2; 
} 

void ToolWindow::on_selectTool_clicked() 
{ 
    mSelection = 0; 
} 

void ToolWindow::on_circleTool_clicked() 
{ 
    mSelection = 3; 
} 

void ToolWindow::on_lineTool_clicked() 
{ 
    mSelection = 4; 
} 

void ToolWindow::on_colorButton_clicked() 
{ 
    colorPicker.show(); 
} 

void ToolWindow::setColor(QColor color) 
{ 
    //ui->colorButton->setPalette(color); 
    //nColor = color; 
}

colorPicker.h

#ifndef COLORPICKER_H 
#define COLORPICKER_H 

#include <QDialog> 
#include <QColor> 
//#include "mainwindow.h" 

namespace Ui { 
class ColorPicker; 
} 

class ColorPicker : public QDialog 
{ 
    Q_OBJECT 
public: 
    explicit ColorPicker(QWidget *parent = 0); 
    ~ColorPicker(); 

    QPalette palete; 

private slots: 
    void on_buttonBox_rejected(); 
    void onColorChanged(); 
    void onCMYKChanged(); 

    void on_buttonBox_accepted(); 

private: 
    Ui::ColorPicker *ui; 
    double min(double a,double b,double c); 

    QColor mColor; 
    double k,c,m,y; 
    int r,g,b; 

signals: 
    void colorChanged(QColor arg); 

}; 

#endif // COLORPICKER_H

colorPicker.cpp

#include "colorpicker.h" 
#include "ui_colorpicker.h" 
#include "toolwindow.h" 
#include "mainwindow.h" 

#include <QPalette> 

ColorPicker::ColorPicker(QWidget *parent) : 
    QDialog(parent), 
    ui(new Ui::ColorPicker) 
{ 
    ui->setupUi(this); 
    connect(ui->redSlider,SIGNAL(valueChanged(int)),SLOT(onColorChanged())); 
    connect(ui->greenSlider,SIGNAL(valueChanged(int)),SLOT(onColorChanged())); 
    connect(ui->blueSlider,SIGNAL(valueChanged(int)),SLOT(onColorChanged())); 
    connect(ui->blackSlider,SIGNAL(valueChanged(int)),SLOT(onCMYKChanged())); 
    connect(ui->yellowSlider,SIGNAL(valueChanged(int)),SLOT(onCMYKChanged())); 
    connect(ui->magentaSlider,SIGNAL(valueChanged(int)),SLOT(onCMYKChanged())); 
    connect(ui->cyanSlider,SIGNAL(valueChanged(int)),SLOT(onCMYKChanged())); 
    //connect(this,SIGNAL(colorChanged(QColor)),toolWindow,SLOT(setColor(QColor))); 
    onColorChanged(); 

} 

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

void ColorPicker::on_buttonBox_rejected() 
{ 
    this->close(); 
} 

double ColorPicker::min(double a,double b,double c) 
{ 
    double tmp; 
    if(a>b) 
    { 
     if(a>c) 
      tmp = a; 
     else 
      tmp = c; 
    } 
    else 
    { 
     if(b>c) 
      tmp = b; 
     else 
      tmp = c; 
    } 
    return tmp; 
} 

void ColorPicker::onColorChanged() 
{ 
    int q1,q2,q3; 
    mColor.setRgb(ui->redSlider->value(),ui->greenSlider->value(),ui->blueSlider->value()); 
    q1=ui->redSlider->value(); 
    q2=ui->greenSlider->value(); 
    q3=ui->blueSlider->value(); 
    palete = ui->widget->palette(); 
    palete.setColor(QPalette::Window, mColor); 
    ui->widget->setPalette(palete); 
    emit colorChanged(mColor); 
    k=min(q1,q2,q3); 
    c=(1-ui->redSlider->value()-k)/(1-k); 
    m=(1-ui->greenSlider->value()-k)/(1-k); 
    y=(1-ui->blueSlider->value()-k)/(1-k); 
    ui->blackSlider->setValue(k); 
    ui->cyanSlider->setValue(c); 
    ui->magentaSlider->setValue(m); 
    ui->yellowSlider->setValue(y); 

} 
void ColorPicker::onCMYKChanged() 
{ 
    mColor.setRgb(ui->redSlider->value(),ui->greenSlider->value(),ui->blueSlider->value()); 
    palete = ui->widget->palette(); 
    palete.setColor(QPalette::Window, mColor); 
    ui->widget->setPalette(palete); 
    emit colorChanged(mColor); 
} 

void ColorPicker::on_buttonBox_accepted() 
{ 
    //QPalette pal = ui->widget->palette(); 
    //pal.setColor(QPalette::Window, mColor); 
    //Ui::ToolWindow 
    //MainWindow::MainWindow().mColor.setRgb(ui->redSlider->value(),ui->greenSlider->value(),ui->blueSlider->value()); 
      //mColor.setRgb(ui->redSlider->value(),ui->greenSlider->value(),ui->blueSlider->value()); 
}

mainWindow.h

#ifndef MAINWINDOW_H 
#define MAINWINDOW_H 

#include <QMainWindow> 
#include "toolwindow.h" 

namespace Ui { 
class MainWindow; 
} 

class QPainter; 
class QImage; 
extern int mSelection; 


class MainWindow : public QMainWindow 
{ 
    Q_OBJECT 

public: 
    explicit MainWindow(QWidget *parent = 0); 
    ~MainWindow(); 
    ToolWindow toolWindow; 
    QColor mColor; 

protected: 
    void paintEvent(QPaintEvent *event) override; 
    void mousePressEvent(QMouseEvent *event) override; 
    void mouseMoveEvent(QMouseEvent *event) override; 
    void mouseReleaseEvent(QMouseEvent *event) override; 

private: 
    Ui::MainWindow *ui; 
    QPainter *mPainter; 
    QImage *mImage; 
    QPixmap mPix; 
    QPoint mBegin; 
    QPoint mEnd; 

    QRect mRect; 
    QLine mLine; 
    bool drawStarted; 
    bool mPressed; 
    int mSize; 

}; 

#endif // MAINWINDOW_H

mainWindow.cpp

#include "mainwindow.h" 
#include "ui_mainwindow.h" 
#include <QDesktopWidget> 
#include <QMouseEvent> 
#include <QPaintEvent> 
#include <QPainter> 
#include <QImage> 

int mSelection = 0; 

MainWindow::MainWindow(QWidget *parent) : 
    QMainWindow(parent), 
    ui(new Ui::MainWindow) 
{ 
    ui->setupUi(this); 
    mPix = QPixmap(400,400); 
    mPix.fill(Qt::white); 
    mPressed = false; 
    drawStarted = false; 
    mColor = QColor(Qt::black); 
    mSize = 2; 


    toolWindow.setWindowFlags(Qt::SubWindow | Qt::WindowDoesNotAcceptFocus); 
    toolWindow.show(); 

} 

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

void MainWindow::paintEvent(QPaintEvent *event) 
{ 
    QPainter painter(this); 
    painter.drawPixmap(0,0,mPix); 

    QPen pen(mColor); 
    pen.setCapStyle(Qt::RoundCap); 
    pen.setWidth(mSize); 
    painter.setPen(pen); 

    if(mPressed) 
    { 
     if(mSelection == 2) 
      painter.drawRect(mRect); 
     else if(mSelection == 4) { 
      painter.drawLine(mLine); 
     } 
     drawStarted = true; 
    } else if (drawStarted){ 
     QPainter tempPainter(&mPix); 
     tempPainter.setPen(pen); 
     if(mSelection == 2) 
      tempPainter.drawRect(mRect); 
     else if(mSelection == 4) { 
      tempPainter.drawLine(mLine); 
     } 
     painter.drawPixmap(0,0,mPix); 
    } 
    painter.end(); 
} 

void MainWindow::mousePressEvent(QMouseEvent *event) 
{ 
    mPressed = true; 
    mBegin = event->pos(); 
    if(mSelection == 2){ 
     mRect.setTopLeft(event->pos()); 
     mRect.setBottomRight(event->pos()); 
    } 
    else if(mSelection == 4){ 
     mLine.setP1(event->pos()); 
     mLine.setP2(event->pos()); 
    } 
} 

void MainWindow::mouseMoveEvent(QMouseEvent *event) 
{ 
    QPen pen(mColor); 
    pen.setCapStyle(Qt::RoundCap); 
    pen.setWidth(mSize); 
    switch(mSelection) 
    { 
    case 1: 
     { 
      QPainter penPainter(&mPix); 
      penPainter.setPen(pen); 
      mEnd = event->pos(); 
      penPainter.drawLine(mBegin, mEnd); 
      mBegin = mEnd; 
      update(); 
      break; 
     } 
    case 2: 
     { 
      mRect.setBottomRight(event->pos()); 
      update(); 
      break; 
     } 
    case 4: 
     { 
      mLine.setP2(event->pos()); 
      update(); 
      break; 
     } 
    } 
} 

void MainWindow::mouseReleaseEvent(QMouseEvent *event) 
{ 

    mPressed = false; 
    update(); 
}

的main.cpp

#include "mainwindow.h" 
#include <QApplication> 

int main(int argc, char *argv[]) 
{ 
    QApplication a(argc, argv); 
    a.setStyle("fusion"); 

    MainWindow w; 
    w.show(); 


    return a.exec(); 
}

colorPicker.ui

<?xml version="1.0" encoding="UTF-8"?> 
<ui version="4.0"> 
<class>ColorPicker</class> 
<widget class="QDialog" name="ColorPicker"> 
    <property name="geometry"> 
    <rect> 
    <x>0</x> 
    <y>0</y> 
    <width>355</width> 
    <height>293</height> 
    </rect> 
    </property> 
    <property name="windowTitle"> 
    <string>Dialog</string> 
    </property> 
    <widget class="QLabel" name="label"> 
    <property name="geometry"> 
    <rect> 
    <x>9</x> 
    <y>9</y> 
    <width>16</width> 
    <height>16</height> 
    </rect> 
    </property> 
    <property name="text"> 
    <string>R</string> 
    </property> 
    </widget> 
    <widget class="QLabel" name="label_2"> 
    <property name="geometry"> 
    <rect> 
    <x>10</x> 
    <y>40</y> 
    <width>16</width> 
    <height>16</height> 
    </rect> 
    </property> 
    <property name="text"> 
    <string>G</string> 
    </property> 
    </widget> 
    <widget class="QLabel" name="label_3"> 
    <property name="geometry"> 
    <rect> 
    <x>10</x> 
    <y>70</y> 
    <width>16</width> 
    <height>16</height> 
    </rect> 
    </property> 
    <property name="text"> 
    <string>B</string> 
    </property> 
    </widget> 
    <widget class="QSlider" name="redSlider"> 
    <property name="geometry"> 
    <rect> 
    <x>30</x> 
    <y>10</y> 
    <width>131</width> 
    <height>22</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    <property name="orientation"> 
    <enum>Qt::Horizontal</enum> 
    </property> 
    </widget> 
    <widget class="QSlider" name="greenSlider"> 
    <property name="geometry"> 
    <rect> 
    <x>30</x> 
    <y>40</y> 
    <width>131</width> 
    <height>22</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    <property name="orientation"> 
    <enum>Qt::Horizontal</enum> 
    </property> 
    </widget> 
    <widget class="QSlider" name="blueSlider"> 
    <property name="geometry"> 
    <rect> 
    <x>30</x> 
    <y>70</y> 
    <width>131</width> 
    <height>22</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    <property name="orientation"> 
    <enum>Qt::Horizontal</enum> 
    </property> 
    </widget> 
    <widget class="QSpinBox" name="redSpinbox"> 
    <property name="geometry"> 
    <rect> 
    <x>170</x> 
    <y>8</y> 
    <width>51</width> 
    <height>20</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    </widget> 
    <widget class="QSpinBox" name="greenSpinbox"> 
    <property name="geometry"> 
    <rect> 
    <x>170</x> 
    <y>40</y> 
    <width>51</width> 
    <height>20</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    </widget> 
    <widget class="QSpinBox" name="blueSpinbox"> 
    <property name="geometry"> 
    <rect> 
    <x>170</x> 
    <y>70</y> 
    <width>51</width> 
    <height>20</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    </widget> 
    <widget class="QLabel" name="label_4"> 
    <property name="geometry"> 
    <rect> 
    <x>10</x> 
    <y>130</y> 
    <width>16</width> 
    <height>16</height> 
    </rect> 
    </property> 
    <property name="text"> 
    <string>K</string> 
    </property> 
    </widget> 
    <widget class="QLabel" name="label_5"> 
    <property name="geometry"> 
    <rect> 
    <x>10</x> 
    <y>160</y> 
    <width>16</width> 
    <height>16</height> 
    </rect> 
    </property> 
    <property name="text"> 
    <string>Y</string> 
    </property> 
    </widget> 
    <widget class="QLabel" name="label_6"> 
    <property name="geometry"> 
    <rect> 
    <x>10</x> 
    <y>190</y> 
    <width>16</width> 
    <height>16</height> 
    </rect> 
    </property> 
    <property name="text"> 
    <string>M</string> 
    </property> 
    </widget> 
    <widget class="QSlider" name="blackSlider"> 
    <property name="geometry"> 
    <rect> 
    <x>30</x> 
    <y>130</y> 
    <width>131</width> 
    <height>22</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    <property name="orientation"> 
    <enum>Qt::Horizontal</enum> 
    </property> 
    </widget> 
    <widget class="QSlider" name="yellowSlider"> 
    <property name="geometry"> 
    <rect> 
    <x>30</x> 
    <y>160</y> 
    <width>131</width> 
    <height>22</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    <property name="orientation"> 
    <enum>Qt::Horizontal</enum> 
    </property> 
    </widget> 
    <widget class="QSlider" name="magentaSlider"> 
    <property name="geometry"> 
    <rect> 
    <x>30</x> 
    <y>190</y> 
    <width>131</width> 
    <height>22</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    <property name="orientation"> 
    <enum>Qt::Horizontal</enum> 
    </property> 
    </widget> 
    <widget class="QDialogButtonBox" name="buttonBox"> 
    <property name="geometry"> 
    <rect> 
    <x>30</x> 
    <y>260</y> 
    <width>156</width> 
    <height>23</height> 
    </rect> 
    </property> 
    <property name="orientation"> 
    <enum>Qt::Horizontal</enum> 
    </property> 
    <property name="standardButtons"> 
    <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set> 
    </property> 
    </widget> 
    <widget class="QWidget" name="widget" native="true"> 
    <property name="geometry"> 
    <rect> 
    <x>230</x> 
    <y>10</y> 
    <width>101</width> 
    <height>271</height> 
    </rect> 
    </property> 
    <property name="minimumSize"> 
    <size> 
    <width>0</width> 
    <height>76</height> 
    </size> 
    </property> 
    <property name="baseSize"> 
    <size> 
    <width>0</width> 
    <height>0</height> 
    </size> 
    </property> 
    <property name="autoFillBackground"> 
    <bool>true</bool> 
    </property> 
    </widget> 
    <widget class="QLabel" name="label_7"> 
    <property name="geometry"> 
    <rect> 
    <x>10</x> 
    <y>220</y> 
    <width>16</width> 
    <height>16</height> 
    </rect> 
    </property> 
    <property name="text"> 
    <string>C</string> 
    </property> 
    </widget> 
    <widget class="QSlider" name="cyanSlider"> 
    <property name="geometry"> 
    <rect> 
    <x>30</x> 
    <y>220</y> 
    <width>131</width> 
    <height>22</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    <property name="singleStep"> 
    <number>1</number> 
    </property> 
    <property name="orientation"> 
    <enum>Qt::Horizontal</enum> 
    </property> 
    </widget> 
    <widget class="QSpinBox" name="blackSpinbox"> 
    <property name="geometry"> 
    <rect> 
    <x>170</x> 
    <y>130</y> 
    <width>51</width> 
    <height>22</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    </widget> 
    <widget class="QSpinBox" name="yellowSpinbox"> 
    <property name="geometry"> 
    <rect> 
    <x>170</x> 
    <y>160</y> 
    <width>51</width> 
    <height>22</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    </widget> 
    <widget class="QSpinBox" name="magentaSpinbox"> 
    <property name="geometry"> 
    <rect> 
    <x>170</x> 
    <y>190</y> 
    <width>51</width> 
    <height>22</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    </widget> 
    <widget class="QSpinBox" name="cyanSpinbox"> 
    <property name="geometry"> 
    <rect> 
    <x>170</x> 
    <y>220</y> 
    <width>51</width> 
    <height>22</height> 
    </rect> 
    </property> 
    <property name="maximum"> 
    <number>255</number> 
    </property> 
    </widget> 
</widget> 
<resources/> 
<connections> 
    <connection> 
    <sender>buttonBox</sender> 
    <signal>accepted()</signal> 
    <receiver>ColorPicker</receiver> 
    <slot>accept()</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>185</x> 
    <y>291</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>157</x> 
    <y>274</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>buttonBox</sender> 
    <signal>rejected()</signal> 
    <receiver>ColorPicker</receiver> 
    <slot>reject()</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>185</x> 
    <y>290</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>286</x> 
    <y>274</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>redSlider</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>redSpinbox</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>163</x> 
    <y>23</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>193</x> 
    <y>22</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>redSpinbox</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>redSlider</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>185</x> 
    <y>11</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>163</x> 
    <y>16</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>greenSlider</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>greenSpinbox</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>163</x> 
    <y>52</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>187</x> 
    <y>53</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>greenSpinbox</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>greenSlider</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>182</x> 
    <y>46</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>163</x> 
    <y>46</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>blueSlider</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>blueSpinbox</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>163</x> 
    <y>80</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>187</x> 
    <y>79</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>blueSpinbox</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>blueSlider</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>179</x> 
    <y>81</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>163</x> 
    <y>78</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>cyanSpinbox</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>cyanSlider</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>178</x> 
    <y>227</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>144</x> 
    <y>225</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>cyanSlider</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>cyanSpinbox</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>143</x> 
    <y>236</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>193</x> 
    <y>241</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>magentaSlider</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>magentaSpinbox</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>144</x> 
    <y>202</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>170</x> 
    <y>202</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>magentaSpinbox</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>magentaSlider</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>191</x> 
    <y>191</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>143</x> 
    <y>195</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>yellowSlider</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>yellowSpinbox</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>146</x> 
    <y>171</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>185</x> 
    <y>175</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>yellowSpinbox</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>yellowSlider</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>181</x> 
    <y>168</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>122</x> 
    <y>170</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>blackSlider</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>blackSpinbox</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>148</x> 
    <y>142</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>183</x> 
    <y>143</y> 
    </hint> 
    </hints> 
    </connection> 
    <connection> 
    <sender>blackSpinbox</sender> 
    <signal>valueChanged(int)</signal> 
    <receiver>blackSlider</receiver> 
    <slot>setValue(int)</slot> 
    <hints> 
    <hint type="sourcelabel"> 
    <x>185</x> 
    <y>136</y> 
    </hint> 
    <hint type="destinationlabel"> 
    <x>143</x> 
    <y>136</y> 
    </hint> 
    </hints> 
    </connection> 
</connections> 
</ui>

我在这篇文章中使用的字符数达到了极限。

这里是链接整个项目：http://uploadfile.pl/pokaz/1252644---svem.html

我试着用信号和槽的解决方案，但它不是为我工作 - 我想我做了错事。

来源

2017-10-28 Lizard_Paszczyk

股份的.ui和主要被发现。 cpp – eyllanesc

我已添加链接以下载我的项目。 –

当ColorPicker颜色改变或按下ColorPicker OK按钮时，是否要更改按钮的颜色？ – eyllanesc

在按下接受对话框的按钮后，要获得QDialog某些属性的值，则不需要使用信号。你必须做的是执行exec()函数，该函数生成一个主循环，所以后面没有执行任何行，该函数返回分别接受和拒绝的接受和拒绝状态。

但对于这一点，你必须创建getter方法将在ColorPicker中被称为颜色：

的* .h

public: 
    QColor color() const;

*。CPP

QColor ColorPicker::color() const 
{ 
    return mColor; 
}

然后我们重写插槽on_colorButton_clicked和功能的ToolWindowsetColor：

void ToolWindow::on_colorButton_clicked() 
{ 
    if(colorPicker.exec() == ColorPicker::Accepted){ 
     setColor(colorPicker.color()); 
    } 
} 

void ToolWindow::setColor(QColor color) 
{ 
    ui->colorButton->setPalette(color); 
}

完整的代码可以在以下link

来源

2017-10-28 13:03:41 eyllanesc

完美的作品！非常感谢你！但我有更多的问题： - 是否有可能返回多个值？ - 我如何将该颜色应用于mColor，它是类mainWindow中的一个变量？ –

没有必要返回多个值，只需为要返回的每个值创建一个getter方法：'if（colorPicker.exec（）== ColorPicker :: Accepted）{setColor（colorPicker.color（）） ; someType someVariable = colorPicker.getSomeValue（）; someAnotherType someAnotherVariable = colorPicker.getAnotherValue（）; ... }' – eyllanesc

对于第二个问题，请为这些属性创建方法和变量（与ColorPicker的颜色相似），然后可以访问它们。阅读有关getters和setter方法的信息。：P – eyllanesc

Qt设置另一个类的按钮颜色

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