QtQSliderEx
Update QtQSliderEx
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touwoyimuli@gmail.com
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52
QtQSliderEx/ExQSlider.cpp
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52
QtQSliderEx/ExQSlider.cpp
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#include "ExQSlider.h"
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#include "ui_ExQSlider.h"
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#include <QPalette>
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ExQSlider::ExQSlider(QWidget *parent) :
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QWidget(parent),
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ui(new Ui::ExQSlider)
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{
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ui->setupUi(this);
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//设置QSlider的最大值为255 (默认范围为0~100)
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ui->sliderRed->setMaximum(255);
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ui->sliderGreen->setMaximum(255);
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ui->sliderBlue->setMaximum(255);
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ui->sliderAlpha->setMaximum(255);
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//初始化QTextEdit的颜色 (否则默认就是白灰色)
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QColor color;
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color.setRgb(145, 190, 251, 255);
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QPalette palette = ui->textColour->palette();
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palette.setColor(QPalette::Base, color);
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ui->textColour->setPalette(palette);
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//连接信号与槽，多个信号，对应一个槽函数
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connect(ui->sliderRed, SIGNAL(valueChanged(int)), this, SLOT(onSetClolor(int)));
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connect(ui->sliderGreen, SIGNAL(valueChanged(int)), this, SLOT(onSetClolor(int)));
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connect(ui->sliderBlue, SIGNAL(valueChanged(int)), this, SLOT(onSetClolor(int)));
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connect(ui->sliderAlpha, SIGNAL(valueChanged(int)), this, SLOT(onSetClolor(int)));
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}
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ExQSlider::~ExQSlider()
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{
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delete ui;
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}
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void ExQSlider::onSetClolor(int val)
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{
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Q_UNUSED(val)
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int nRed = ui->sliderRed->value(); //获取红绿蓝(RGB)的Slider的数值
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int nGreen = ui->sliderGreen->value();
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int nBlue = ui->sliderBlue->value();
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int nAlpha = ui->sliderAlpha->value();
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QColor color;
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color.setRgb(nRed, nGreen, nBlue, nAlpha);
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QPalette palette = ui->textColour->palette(); //获取textColour控件的所有颜色值(调色板)
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palette.setColor(QPalette::Base, color); //设置textColou的某一角色(即控件)的颜色
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ui->textColour->setPalette(palette);
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ui->labRgbVal->setText(QString("RGB(%1, %2, %3, %4)").arg(nRed).arg(nGreen).arg(nBlue).arg(nAlpha)); //时刻显示RGBa的具体值
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}
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25
QtQSliderEx/ExQSlider.h
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QtQSliderEx/ExQSlider.h
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#ifndef EXQSLIDER_H
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#define EXQSLIDER_H
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#include <QWidget>
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namespace Ui {
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class ExQSlider;
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}
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class ExQSlider : public QWidget
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{
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Q_OBJECT
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public:
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explicit ExQSlider(QWidget *parent = nullptr);
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~ExQSlider();
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public slots:
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void onSetClolor(int val);
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private:
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Ui::ExQSlider *ui;
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};
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#endif // EXQSLIDER_H
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QtQSliderEx/ExQSlider.ui
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QtQSliderEx/ExQSlider.ui
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<?xml version="1.0" encoding="UTF-8"?>
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<ui version="4.0">
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<class>ExQSlider</class>
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<widget class="QWidget" name="ExQSlider">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>644</width>
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<height>284</height>
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</rect>
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</property>
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<property name="windowTitle">
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<string>ExQSlider</string>
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</property>
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<layout class="QGridLayout" name="gridLayout_2">
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<item row="0" column="1">
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<layout class="QVBoxLayout" name="verticalLayout">
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<item>
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<widget class="QTextEdit" name="textColour">
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<property name="enabled">
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<bool>false</bool>
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</property>
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<property name="minimumSize">
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<size>
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<width>200</width>
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<height>0</height>
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</size>
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</property>
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</widget>
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</item>
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<item>
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<widget class="QLabel" name="labRgbVal">
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<property name="enabled">
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<bool>false</bool>
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</property>
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<property name="text">
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<string>RGB(145, 190, 251, 255)</string>
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</property>
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<property name="scaledContents">
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<bool>false</bool>
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</property>
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<property name="alignment">
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<set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
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</property>
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</widget>
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</item>
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</layout>
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</item>
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<item row="0" column="0">
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<layout class="QGridLayout" name="gridLayout">
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<item row="0" column="1">
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<widget class="QSlider" name="sliderRed">
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<property name="minimumSize">
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<size>
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<width>320</width>
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<height>0</height>
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</size>
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</property>
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<property name="maximum">
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<number>255</number>
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</property>
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<property name="value">
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<number>145</number>
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</property>
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<property name="orientation">
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<enum>Qt::Horizontal</enum>
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</property>
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</widget>
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</item>
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<item row="2" column="1">
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<widget class="QSlider" name="sliderBlue">
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<property name="maximum">
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<number>255</number>
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</property>
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<property name="value">
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<number>251</number>
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</property>
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<property name="orientation">
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<enum>Qt::Horizontal</enum>
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</property>
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</widget>
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</item>
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<item row="3" column="0">
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<widget class="QLabel" name="labAlpha">
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<property name="text">
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<string>Alpha</string>
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</property>
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<property name="alignment">
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<set>Qt::AlignCenter</set>
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</property>
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</widget>
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</item>
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<item row="2" column="0">
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<widget class="QLabel" name="labBlue">
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<property name="text">
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<string>Blue</string>
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</property>
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<property name="alignment">
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<set>Qt::AlignCenter</set>
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</property>
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</widget>
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</item>
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<item row="0" column="0">
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<widget class="QLabel" name="labRed">
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<property name="text">
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<string>Red</string>
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</property>
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<property name="alignment">
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<set>Qt::AlignCenter</set>
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</property>
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</widget>
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</item>
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<item row="1" column="0">
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<widget class="QLabel" name="labGreen">
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<property name="text">
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<string>Green</string>
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</property>
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<property name="alignment">
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<set>Qt::AlignCenter</set>
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</property>
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</widget>
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</item>
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<item row="1" column="1">
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<widget class="QSlider" name="sliderGreen">
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<property name="maximum">
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<number>255</number>
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</property>
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<property name="value">
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<number>190</number>
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</property>
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<property name="orientation">
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<enum>Qt::Horizontal</enum>
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</property>
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</widget>
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</item>
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<item row="3" column="1">
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<widget class="QSlider" name="sliderAlpha">
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<property name="maximum">
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<number>255</number>
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</property>
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<property name="value">
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<number>255</number>
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</property>
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<property name="orientation">
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<enum>Qt::Horizontal</enum>
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</property>
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</widget>
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</item>
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</layout>
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</item>
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</layout>
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</widget>
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<layoutdefault spacing="6" margin="11"/>
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<resources/>
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<connections/>
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</ui>
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40
QtQSliderEx/QtQSliderEx.pro
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#-------------------------------------------------
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#
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# Project created by QtCreator 2019-08-20T23:59:16
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#
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#-------------------------------------------------
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QT += core gui
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greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
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TARGET = QtQSliderEx
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TEMPLATE = app
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# The following define makes your compiler emit warnings if you use
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# any feature of Qt which has been marked as deprecated (the exact warnings
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# depend on your compiler). Please consult the documentation of the
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# deprecated API in order to know how to port your code away from it.
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DEFINES += QT_DEPRECATED_WARNINGS
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# You can also make your code fail to compile if you use deprecated APIs.
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# In order to do so, uncomment the following line.
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# You can also select to disable deprecated APIs only up to a certain version of Qt.
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#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
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CONFIG += c++11
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SOURCES += \
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main.cpp \
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ExQSlider.cpp
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HEADERS += \
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ExQSlider.h
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FORMS += \
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ExQSlider.ui
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# Default rules for deployment.
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qnx: target.path = /tmp/$${TARGET}/bin
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else: unix:!android: target.path = /opt/$${TARGET}/bin
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!isEmpty(target.path): INSTALLS += target
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11
QtQSliderEx/main.cpp
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11
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#include "ExQSlider.h"
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#include <QApplication>
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int main(int argc, char *argv[])
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{
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QApplication a(argc, argv);
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ExQSlider w;
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w.show();
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return a.exec();
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}
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