touchGFX综合学习二、ClickListener

一、ClickListener介绍

ClickListener就是点击监听器事件，当控件接收到单击事件时调用该事件。

二、touchGFX工程搭建

工程中添加image控件

勾选ClickListener选项

三、工程源码修改

1、Screen1View.hpp

添加事件处理函数

    Callback<Screen1View, const touchgfx::Image & , const touchgfx::ClickEvent &> imageClickHandler;void image_click_handler(const touchgfx::Image &image , const touchgfx::ClickEvent &event);

注意格式要一样哦

2、Screen1View.cpp

首先初始化imageClickHandler

imageClickHandler(this,&Screen1View::image_click_handler)

然后为image控件添加点击处理回调函数

 image1.setClickAction(imageClickHandler);

实现回调函数

#include "rtthread.h"
void Screen1View::image_click_handler(const touchgfx::Image &image , const touchgfx::ClickEvent &event)
{if(&image == &this->image1){if(event.getType() == ClickEvent::PRESSED){rt_kprintf("PRESSED\r\n");}else if(event.getType() == ClickEvent::RELEASED){rt_kprintf("RELEASED\r\n");}}
}