Qt学习笔记（四）

Qt学习笔记（四） P16

spinBox

P17

sample4_4.h

#pragma once

#include 
#include "ui_sample4_4.h"

class sample4_4 : public QWidget
{
	Q_OBJECT

public:
	sample4_4(QWidget *parent = Q_NULLPTR);
public slots:
	virtual void on_sliderRed_valueChanged(int value);
	virtual void on_sliderH_valueChanged(int value);
	virtual void on_dial_valueChanged(int value);

private:
	Ui::sample4_4Class ui;
};

sample4_4.cpp

#include "sample4_4.h"

sample4_4::sample4_4(QWidget *parent)
	: QWidget(parent)
{
	ui.setupUi(this);
	connect(ui.sliderRed, SIGNAL(valueChanged()), this, SLOT(on_sliderRed_valueChanged()));

}

void sample4_4::on_sliderRed_valueChanged(int value)
{
	Q_UNUSED(value);
	QPalette pal = ui.textEdit->palette();
	QColor color;
	color.setRgb(ui.sliderRed->value(), ui.sliderGreen->value(),
		99, 55);
	pal.setColor(QPalette::base,color);
	ui.textEdit->setPalette(pal);

}

void sample4_4::on_sliderH_valueChanged(int value)
{
	ui.progressBar->setValue(value);
	ui.horizontalScrollBar->setValue(value);
}

void sample4_4::on_dial_valueChanged(int value)
{
	ui.lcdNumber->display(value);
}

插入图标

P18

P19

sample4_6.h

#pragma once

#include 
#include "ui_sample4_6.h"
#include"qmap.h"

class sample4_6 : public QWidget
{
	Q_OBJECT

public:
	sample4_6(QWidget *parent = Q_NULLPTR);
public slots:
	virtual void on_btnIniItems_clicked();
	virtual void on_btnClear_clicked();
	virtual void on_btnIniIt_2_clicked();

private:
	Ui::sample4_6Class ui;
};

sample4_6.cpp

#include "sample4_6.h"

sample4_6::sample4_6(QWidget *parent)
	: QWidget(parent)
{
	ui.setupUi(this);
}

void sample4_6::on_btnIniItems_clicked()
{
	ui.comboBox->clear();
	for (int i = 0; i < 20; i++)
	{
		ui.comboBox->addItem(QString::asprintf("Item %d", i));
	}
}

void sample4_6::on_btnClear_clicked()
{
	ui.comboBox->clear();
}

void sample4_6::on_btnIniIt_2_clicked()
{
	ui.comboBox_2->clear();
	QMap City_Zone;
	City_Zone.insert("beijing", 10);
	City_Zone.insert("上海", 20);
	City_Zone.insert("北京", 30);
	foreach (auto str, City_Zone.keys())
	{
		ui.comboBox_2->addItem(str, City_Zone.value(str));
	}
}