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iOrchid
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109 changes: 109 additions & 0 deletions
109
compose/src/main/java/org/zhiwei/compose/screen/gesture/TapDragGestures.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| package org.zhiwei.compose.screen.gesture | ||
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| import androidx.compose.foundation.background | ||
| import androidx.compose.foundation.gestures.detectTapGestures | ||
| import androidx.compose.foundation.layout.Box | ||
| import androidx.compose.foundation.layout.Column | ||
| import androidx.compose.foundation.layout.fillMaxSize | ||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.layout.height | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.foundation.rememberScrollState | ||
| import androidx.compose.foundation.shape.RoundedCornerShape | ||
| import androidx.compose.foundation.verticalScroll | ||
| import androidx.compose.material3.Text | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.mutableStateOf | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.runtime.setValue | ||
| import androidx.compose.ui.Alignment | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.draw.shadow | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.input.pointer.pointerInput | ||
| import androidx.compose.ui.tooling.preview.Preview | ||
| import androidx.compose.ui.unit.dp | ||
| import androidx.compose.ui.unit.sp | ||
| import org.zhiwei.compose.ui.widget.Title_Desc_Text | ||
| import org.zhiwei.compose.ui.widget.Title_Sub_Text | ||
| import org.zhiwei.compose.ui.widget.Title_Text | ||
|
|
||
| /** | ||
| * 点击，拖拽手势 | ||
| */ | ||
| @Composable | ||
| internal fun TapDragGestures_Screen(modifier: Modifier = Modifier) { | ||
| Column( | ||
| modifier | ||
| .fillMaxSize() | ||
| .verticalScroll(rememberScrollState()) | ||
| ) { | ||
| Title_Text(title = "Tap和Drag手势") | ||
| Title_Sub_Text(title = "1. 使用pointerInput的detectTapGestures来感知触摸事件") | ||
| Title_Desc_Text(desc = "感知Press、Tap单击、DoubleClick双击、LongClick双击。") | ||
| var gestureText by remember { mutableStateOf("Press,Tap,Drag,DoubleClick,LongClick") } | ||
| var gestureColor by remember { mutableStateOf(Color(0xFFFCA104)) } | ||
| val gestureModifier = commonModifier | ||
| .background(gestureColor) | ||
| .pointerInput(Unit) { | ||
| detectTapGestures(onDoubleTap = { | ||
| gestureText = "双击DoubleClick" | ||
| gestureColor = Color(0xFF41B349) | ||
| }, onLongPress = { | ||
| gestureText = "长按LongPress" | ||
| gestureColor = Color(0xFFF43E06) | ||
| }, onPress = { | ||
| gestureText = "按下Press" | ||
| gestureColor = Color(0xFFCADDD5) | ||
| }, onTap = { | ||
| gestureText = "点击Tap" | ||
| gestureColor = Color(0xFF3EEDE7) | ||
| }) | ||
| } | ||
| GestureDetectButton(modifier = gestureModifier, text = gestureText) | ||
| Title_Desc_Text(desc = "通过tryAwaitRelease来等待⌛️释放按压事件。") | ||
| //如上可值，默认的触摸事件，会分为按压，单击，双击，长按，是通过触摸down，up，等事件判断的。 | ||
| var gestureText2 by remember { mutableStateOf("Press,Tap,Drag,DoubleClick,LongClick") } | ||
| var gestureColor2 by remember { mutableStateOf(Color(0xFFFCA104)) } | ||
| // 这里可以单独处理按压down，而后等待up，而不去触发其他事件类型分析。 | ||
| val awaitModifier = commonModifier | ||
| .background(gestureColor2) | ||
| .pointerInput(Unit) { | ||
| detectTapGestures(onPress = { | ||
| gestureText2 = "按下Press" | ||
| gestureColor2 = Color(0xFFCADDD5) | ||
| val released = runCatching { tryAwaitRelease() }.getOrElse { false } | ||
| if (released) { | ||
| gestureText2 = "Release释放了" | ||
| gestureColor2 = Color(0xFF41B349) | ||
| } else { | ||
| gestureText2 = "Cancel取消了" | ||
| gestureColor2 = Color(0xFFF43E06) | ||
| } | ||
| }) | ||
| } | ||
| GestureDetectButton(modifier = awaitModifier, text = gestureText2) | ||
| } | ||
| } | ||
|
|
||
| //本页面内通用的部分modifier | ||
| private val commonModifier = Modifier | ||
| .padding(8.dp) | ||
| .fillMaxWidth() | ||
| .height(50.dp) | ||
| .shadow(elevation = 2.dp, shape = RoundedCornerShape(8.dp), clip = true) | ||
|
|
||
| @Composable | ||
| private fun GestureDetectButton(modifier: Modifier, text: String) { | ||
| Box(modifier = modifier, contentAlignment = Alignment.Center) { | ||
| Text(text = text, color = Color.White, fontSize = 12.sp) | ||
| } | ||
| } | ||
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| @Preview | ||
| @Composable | ||
| private fun PreviewTapDrag() { | ||
| TapDragGestures_Screen() | ||
| } |