Qt 模仿企业微信图标实现按钮图片文字上下结构

news2024/11/15 17:40:03

简述

实现类似企业微信左侧导航栏的上下结构的按钮

效果图

可以用2种方案实现，2种最终效果图如下：

方案1 QToolButton 实现

	ui.toolButton->setFixedSize(50, 50);
	ui.toolButton->setCheckable(true);
	ui.toolButton->setAutoExclusive(true);
	ui.toolButton->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
	ui.toolButton_2->setFixedSize(50, 50);
	ui.toolButton_2->setCheckable(true);
	ui.toolButton_2->setAutoExclusive(true);
	ui.toolButton_2->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);

	connect(ui.toolButton, &QToolButton::toggled, this, [=]() {
		ui.toolButton->setIcon(ui.toolButton->isChecked() ? QIcon(":/pafeyDemo/Resources/bar/nav_app_select.png") : QIcon(":/pafeyDemo/Resources/bar/nav_app_normal.png"));
	});
	connect(ui.toolButton_2, &QToolButton::toggled, this, [=]() {
		ui.toolButton_2->setIcon(ui.toolButton_2->isChecked() ? QIcon(":/pafeyDemo/Resources/bar/nav_app_select.png") : QIcon(":/pafeyDemo/Resources/bar/nav_app_normal.png"));
	});

qss

QToolButton
{
	border:none;
	background-color: rgba(255,255,255,0);
	color: #CADFFF;
}
QToolButton:hover
{
	border-radius:5px;
	background-color: rgba(255,255,255,15);
	color: #CADFFF;
}
QToolButton:checked
{
	border-radius:5px;
	background-color: rgba(255,255,255,20);
	color: #FFFFFF;
}
QToolButton:checked:hover
{ 
	background-color: rgba(255,255,255,30);
	color: #FFFFFF; 
}

用 QToolButton 实现有个按下效果，按下之后图标会往右偏一点点。

UI像素眼表示不服，重做！

方案2 继承 QPushButton 重写 paintEvent 实现

新建一个继承自QPushButton的子类 QUpdownButton

QUpdownButton.h

#pragma once

#include <QPushButton>
#include "ui_QUpdownButton.h"

class QUpdownButton : public QPushButton
{
	Q_OBJECT
public:
	QUpdownButton(const QString &text, QString iconNormal, QString iconSelect, QWidget *parent = Q_NULLPTR);
	~QUpdownButton();
	void paintEvent(QPaintEvent *event);

private:
	Ui::QUpdownButton ui;
	QString m_text;
	QString m_iconNormal;
	QString m_iconSelect;
};

QUpdownButton.cpp

#include "QUpdownButton.h"
#include <QPainter>  
#include <QPixmap>  

QUpdownButton::QUpdownButton(const QString &text, QString iconNormal, QString iconSelect, QWidget *parent)
	: QPushButton(parent),
	m_text(text)
	, m_iconNormal(iconNormal)
	, m_iconSelect(iconSelect)
{
	ui.setupUi(this);
	setFixedSize(50, 50);
	setText(text);
	setStyleSheet(QString::fromLocal8Bit("\
QPushButton{ border-radius:6px; background-color: rgba(255,255,255,0); color: #CADFFF; font: 9pt \"微软雅黑\"; text-align: bottom; padding-bottom: 6px; }\
QPushButton:hover{ background-color: rgba(255,255,255,15); color: #CADFFF; }\
QPushButton:pressed{ background-color: rgba(255,255,255,20); color: #CADFFF; }\
QPushButton:checked{ background-color: rgba(255,255,255,20); color: #FFFFFF; }\
QPushButton:checked:hover{ background-color: rgba(255,255,255,30); color: #FFFFFF; }\
		"));
}

QUpdownButton::~QUpdownButton()
{
}

void QUpdownButton::paintEvent(QPaintEvent *event)
{
	QPushButton::paintEvent(event); // 调用基类的 paintEvent  

	QPainter painter(this);
	QRect buttonRect = this->rect();

	// 加载图片  
	QString btIcon = this->isChecked() ? m_iconSelect : m_iconNormal;
	QPixmap pixmap(btIcon);

	// 图标区域高度占按钮高度的2/3，文字占1/3  
	int iconAreaHeight = buttonRect.height() - (buttonRect.height() / 3); 

	// 按钮图标尺寸20*20 
	int newWidth = 20;
	int newHeight = 20;

	// 计算图标位置  
	int x = (buttonRect.width() - newWidth) / 2;
	int y = (iconAreaHeight - newHeight) / 2;

	// 绘制缩放后的图片  
	QPixmap scaledPixmap = pixmap.scaled(newWidth, newHeight, Qt::KeepAspectRatio, Qt::SmoothTransformation);
	painter.drawPixmap(x, y, scaledPixmap);

	// 绘制文字  
	//QString text = this->text();
	//QRect textRect = QRect(0, scaledHeight-RATIO_X(6), buttonRect.width(), buttonRect.height() - scaledHeight);
	//painter.drawText(textRect, Qt::AlignCenter, m_text);
}

使用：

	ui.toolButton->setFixedSize(50, 50);
	ui.toolButton->setCheckable(true);
	ui.toolButton->setAutoExclusive(true);
	ui.toolButton->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);
	ui.toolButton_2->setFixedSize(50, 50);
	ui.toolButton_2->setCheckable(true);
	ui.toolButton_2->setAutoExclusive(true);
	ui.toolButton_2->setToolButtonStyle(Qt::ToolButtonTextUnderIcon);

	connect(ui.toolButton, &QToolButton::toggled, this, [=]() {
		ui.toolButton->setIcon(ui.toolButton->isChecked() ? QIcon(":/pafeyDemo/Resources/bar/nav_app_select.png") : QIcon(":/pafeyDemo/Resources/bar/nav_app_normal.png"));
	});
	connect(ui.toolButton_2, &QToolButton::toggled, this, [=]() {
		ui.toolButton_2->setIcon(ui.toolButton_2->isChecked() ? QIcon(":/pafeyDemo/Resources/bar/nav_app_select.png") : QIcon(":/pafeyDemo/Resources/bar/nav_app_normal.png"));
	});

	m_updownButton = new QUpdownButton(QString::fromLocal8Bit("应用"), QString(":/pafeyDemo/Resources/bar/nav_app_normal.png"), QString(":/pafeyDemo/Resources/bar/nav_app_select.png"));
	m_updownButton2 = new QUpdownButton(QString::fromLocal8Bit("应用2"), QString(":/pafeyDemo/Resources/bar/nav_app_normal.png"), QString(":/pafeyDemo/Resources/bar/nav_app_select.png"));
	ui.verticalLayout_2->insertWidget(2, m_updownButton);
	ui.verticalLayout_2->insertWidget(3, m_updownButton2);
	m_updownButton->setCheckable(true);
	m_updownButton->setAutoExclusive(true);
	m_updownButton2->setCheckable(true);
	m_updownButton2->setAutoExclusive(true);

最终效果如下：