kuikly-expand-view

import com.tencent.kuikly.core.base.DeclarativeBaseView

class MyImageView : DeclarativeBaseView<MyImageAttr, MyImageEvent>() {

    override fun createAttr(): MyImageAttr {
        return MyImageAttr()
    }

    override fun createEvent(): MyImageEvent {
        return MyImageEvent()
    }

    // 返回 Native 侧注册的组件名
    override fun viewName(): String {
        return "HRImageView"
    }
    
    // 组件方法（可选），实际实现在 Native 侧
    fun test() {
        performTaskWhenRenderViewDidLoad {
            renderView?.callMethod("test", "params")
        }
    }
}

import com.tencent.kuikly.core.base.Attr

class MyImageAttr : Attr() {

    /**
     * 设置图片数据源
     * @param src 图片 URL
     * @return this（支持链式调用）
     */
    fun src(src: String): MyImageAttr {
        "src" with src  // 将属性透传给原生组件
        return this
    }

    /**
     * 设置占位图
     */
    fun placeholder(url: String): MyImageAttr {
        "placeholder" with url
        return this
    }

    /**
     * 设置缩放模式
     */
    fun scaleType(type: String): MyImageAttr {
        "scaleType" with type
        return this
    }
}

import com.tencent.kuikly.core.base.event.Event
import com.tencent.kuikly.core.nvi.serialization.json.JSONObject

class MyImageEvent : Event() {

    /**
     * 图片加载成功回调
     */
    fun loadSuccess(handler: (LoadSuccessParams) -> Unit) {
        register(LOAD_SUCCESS) {
            handler(LoadSuccessParams.decode(it))
        }
    }

    /**
     * 图片加载失败回调
     */
    fun loadError(handler: (LoadErrorParams) -> Unit) {
        register(LOAD_ERROR) {
            handler(LoadErrorParams.decode(it))
        }
    }

    companion object {
        const val LOAD_SUCCESS = "loadSuccess"
        const val LOAD_ERROR = "loadError"
    }
}

// 事件参数解析类
data class LoadSuccessParams(
    val src: String,
    val width: Int,
    val height: Int
) {
    companion object {
        fun decode(params: Any?): LoadSuccessParams {
            val tempParams = params as? JSONObject ?: JSONObject()
            return LoadSuccessParams(
                src = tempParams.optString("src", ""),
                width = tempParams.optInt("width", 0),
                height = tempParams.optInt("height", 0)
            )
        }
    }
}

data class LoadErrorParams(
    val src: String,
    val errorCode: Int
) {
    companion object {
        fun decode(params: Any?): LoadErrorParams {
            val tempParams = params as? JSONObject ?: JSONObject()
            return LoadErrorParams(
                src = tempParams.optString("src", ""),
                errorCode = tempParams.optInt("errorCode", 0)
            )
        }
    }
}

class MyImageView : DeclarativeBaseView<MyImageAttr, MyImageEvent>() {
    // ...
    
    /**
     * 重新加载图片（无返回值）
     */
    fun reload() {
        performTaskWhenRenderViewDidLoad {
            renderView?.callMethod("reload", null)
        }
    }
    
    /**
     * 获取图片信息（异步回调）
     */
    fun getImageInfo(callback: (width: Int, height: Int) -> Unit) {
        performTaskWhenRenderViewDidLoad {
            renderView?.callMethod("getImageInfo", null) { result ->
                val json = result as? JSONObject
                callback(json?.optInt("width") ?: 0, json?.optInt("height") ?: 0)
            }
        }
    }
}

import com.tencent.kuikly.core.base.ViewContainer

fun ViewContainer<*, *>.MyImage(init: MyImageView.() -> Unit) {
    addChild(MyImageView(), init)
}

override fun body(): ViewBuilder {
    val ctx = this
    return {
        MyImage {
            attr {
                size(176f, 132f)
                src("https://example.com/image.png")
                placeholder("https://example.com/placeholder.png")
            }
            event {
                loadSuccess { params ->
                    println("图片加载成功: ${params.src}, 尺寸: ${params.width}x${params.height}")
                }
                loadError { params ->
                    println("图片加载失败: ${params.errorCode}")
                }
            }
        }
    }
}

@Page("MyPage")
class MyPage : Pager() {
    
    // 声明 ViewRef
    private val imageRef = ViewRef<MyImageView>()
    
    override fun body(): ViewBuilder {
        return {
            MyImage {
                // 绑定 ref
                ref(imageRef)
                attr {
                    src("https://example.com/image.png")
                }
            }
            
            Button {
                attr { title("重新加载") }
                event {
                    click {
                        // 通过 ref 调用方法
                        imageRef.view?.reload()
                    }
                }
            }
        }
    }
}

// 保存回调
private var loadSuccessCallback: KuiklyRenderCallback? = null

override fun setProp(propKey: String, propValue: Any): Boolean {
    return when (propKey) {
        "loadSuccess" -> {
            loadSuccessCallback = propValue as KuiklyRenderCallback
            true
        }
        else -> super.setProp(propKey, propValue)
    }
}

// 触发回调
private fun onImageLoaded(src: String, width: Int, height: Int) {
    loadSuccessCallback?.invoke(mapOf(
        "src" to src,
        "width" to width,
        "height" to height
    ))
}