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Simple game example (#224)

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Nikolay Igotti 4 years ago committed by GitHub
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  1. 1
      README.md
  2. 35
      examples/falling_balls/build.gradle.kts
  3. 1
      examples/falling_balls/gradle.properties
  4. BIN
      examples/falling_balls/gradle/wrapper/gradle-wrapper.jar
  5. 5
      examples/falling_balls/gradle/wrapper/gradle-wrapper.properties
  6. 185
      examples/falling_balls/gradlew
  7. 89
      examples/falling_balls/gradlew.bat
  8. 10
      examples/falling_balls/settings.gradle.kts
  9. 133
      examples/falling_balls/src/main/kotlin/Game.kt
  10. 54
      examples/falling_balls/src/main/kotlin/Piece.kt
  11. 10
      examples/falling_balls/src/main/kotlin/main.kt

1
README.md
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@ -14,6 +14,7 @@ at https://android.googlesource.com/platform/frameworks/support.
* [codeviewer](examples/codeviewer) - File Browser and Code Viewer application for Android and Desktop * [codeviewer](examples/codeviewer) - File Browser and Code Viewer application for Android and Desktop
* [imageviewer](examples/imageviewer) - Image Viewer application for Android and Desktop * [imageviewer](examples/imageviewer) - Image Viewer application for Android and Desktop
* [issues](examples/issues) - GitHub issue tracker with an adaptive UI and ktor-client * [issues](examples/issues) - GitHub issue tracker with an adaptive UI and ktor-client
* [game](examples/falling_balls) - Simple game
* [todoapp](examples/todoapp) - TODO items tracker with persistence and multiple screens * [todoapp](examples/todoapp) - TODO items tracker with persistence and multiple screens
* [gradle-plugins](gradle-plugins) - a plugin, simplifying usage of Compose with Gradle * [gradle-plugins](gradle-plugins) - a plugin, simplifying usage of Compose with Gradle
* [templates](templates) - new application templates (see `desktop-template/build_and_run_from_cli_example.sh` for using without Gradle) * [templates](templates) - new application templates (see `desktop-template/build_and_run_from_cli_example.sh` for using without Gradle)

35
examples/falling_balls/build.gradle.kts
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import org.jetbrains.compose.compose
import org.jetbrains.compose.desktop.application.dsl.TargetFormat
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
plugins {
kotlin("jvm") version "1.4.21"
id("org.jetbrains.compose") version "0.3.0-build136"
}
group = "me.user"
version = "1.0"
repositories {
jcenter()
mavenCentral()
maven { url = uri("https://maven.pkg.jetbrains.space/public/p/compose/dev") }
}
dependencies {
implementation(compose.desktop.currentOs)
}
tasks.withType<KotlinCompile>() {
kotlinOptions.jvmTarget = "11"
}
compose.desktop {
application {
mainClass = "org.jetbrains.compose.demo.falling.MainKt"
nativeDistributions {
targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
packageName = "falling_balls"
}
}
}

1
examples/falling_balls/gradle.properties
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kotlin.code.style=official

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examples/falling_balls/gradle/wrapper/gradle-wrapper.jar vendored
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5
examples/falling_balls/gradle/wrapper/gradle-wrapper.properties vendored
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distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

185
examples/falling_balls/gradlew vendored
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#!/usr/bin/env sh
#
# Copyright 2015 the original author or authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
##############################################################################
##
## Gradle start up script for UN*X
##
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
PRG="$0"
# Need this for relative symlinks.
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`"/$link"
fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >/dev/null
APP_HOME="`pwd -P`"
cd "$SAVED" >/dev/null
APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"
warn () {
echo "$*"
}
die () {
echo
echo "$*"
echo
exit 1
}
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "`uname`" in
CYGWIN* )
cygwin=true
;;
Darwin* )
darwin=true
;;
MINGW* )
msys=true
;;
NONSTOP* )
nonstop=true
;;
esac
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD="$JAVA_HOME/jre/sh/java"
else
JAVACMD="$JAVA_HOME/bin/java"
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD="java"
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
# Increase the maximum file descriptors if we can.
if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
MAX_FD_LIMIT=`ulimit -H -n`
if [ $? -eq 0 ] ; then
if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
MAX_FD="$MAX_FD_LIMIT"
fi
ulimit -n $MAX_FD
if [ $? -ne 0 ] ; then
warn "Could not set maximum file descriptor limit: $MAX_FD"
fi
else
warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
fi
fi
# For Darwin, add options to specify how the application appears in the dock
if $darwin; then
GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi
# For Cygwin or MSYS, switch paths to Windows format before running java
if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
APP_HOME=`cygpath --path --mixed "$APP_HOME"`
CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
JAVACMD=`cygpath --unix "$JAVACMD"`
# We build the pattern for arguments to be converted via cygpath
ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
SEP=""
for dir in $ROOTDIRSRAW ; do
ROOTDIRS="$ROOTDIRS$SEP$dir"
SEP="|"
done
OURCYGPATTERN="(^($ROOTDIRS))"
# Add a user-defined pattern to the cygpath arguments
if [ "$GRADLE_CYGPATTERN" != "" ] ; then
OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
fi
# Now convert the arguments - kludge to limit ourselves to /bin/sh
i=0
for arg in "$@" ; do
CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
else
eval `echo args$i`="\"$arg\""
fi
i=`expr $i + 1`
done
case $i in
0) set -- ;;
1) set -- "$args0" ;;
2) set -- "$args0" "$args1" ;;
3) set -- "$args0" "$args1" "$args2" ;;
4) set -- "$args0" "$args1" "$args2" "$args3" ;;
5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
esac
fi
# Escape application args
save () {
for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
echo " "
}
APP_ARGS=`save "$@"`
# Collect all arguments for the java command, following the shell quoting and substitution rules
eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
exec "$JAVACMD" "$@"

89
examples/falling_balls/gradlew.bat vendored
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@ -0,0 +1,89 @@
@rem
@rem Copyright 2015 the original author or authors.
@rem
@rem Licensed under the Apache License, Version 2.0 (the "License");
@rem you may not use this file except in compliance with the License.
@rem You may obtain a copy of the License at
@rem
@rem https://www.apache.org/licenses/LICENSE-2.0
@rem
@rem Unless required by applicable law or agreed to in writing, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem
@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto execute
echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto execute
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

10
examples/falling_balls/settings.gradle.kts
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@ -0,0 +1,10 @@
pluginManagement {
repositories {
gradlePluginPortal()
mavenCentral()
maven { url = uri("https://maven.pkg.jetbrains.space/public/p/compose/dev") }
}
}
rootProject.name = "falling_balls"

133
examples/falling_balls/src/main/kotlin/Game.kt
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package org.jetbrains.compose.demo.falling
import androidx.compose.foundation.layout.*
import androidx.compose.material.Button
import androidx.compose.material.Slider
import androidx.compose.material.Text
import androidx.compose.runtime.*
import androidx.compose.runtime.dispatch.withFrameNanos
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.layout.onSizeChanged
import androidx.compose.ui.unit.IntSize
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import kotlin.random.Random
class Game {
private var previousTimeNanos: Long = Long.MAX_VALUE
private val colors = arrayOf(
Color.Red, Color.Blue, Color.Cyan,
Color.Magenta, Color.Yellow, Color.Black
)
private var startTime = 0L
var size by mutableStateOf(IntSize(0, 0))
var pieces = mutableStateListOf<PieceData>()
private set
var elapsed by mutableStateOf(0L)
var score by mutableStateOf(0)
var clicked by mutableStateOf(0)
var started by mutableStateOf(false)
var paused by mutableStateOf(false)
var finished by mutableStateOf(false)
var numBlocks by mutableStateOf(5)
fun start() {
previousTimeNanos = System.nanoTime()
startTime = previousTimeNanos
clicked = 0
started = true
finished = false
paused = false
pieces.clear()
repeat(numBlocks) { index ->
pieces.add(PieceData(this, index * 1.5f + 5f, colors[index % colors.size]).also { piece ->
piece.position = Random.nextDouble(0.0, 100.0).toFloat()
})
}
}
fun togglePause() {
paused = !paused
previousTimeNanos = System.nanoTime()
}
fun update(nanos: Long) {
val dt = (nanos - previousTimeNanos).coerceAtLeast(0)
previousTimeNanos = nanos
elapsed = nanos - startTime
pieces.forEach { it.update(dt) }
}
fun clicked(piece: PieceData) {
score += piece.velocity.toInt()
clicked++
if (clicked == numBlocks) {
finished = true
}
}
}
@Composable
fun FallingBallsGame() {
val game = remember { Game() }
Column {
Text(
"Catch balls!${if (game.finished) " Game over!" else ""}",
fontSize = 50.sp,
color = Color(218, 120, 91)
)
Text("Score ${game.score} Time ${game.elapsed / 1_000_000} Blocks ${game.numBlocks}", fontSize = 35.sp)
Row {
if (!game.started) {
Slider(
value = game.numBlocks / 20f,
onValueChange = { game.numBlocks = (it * 20f).toInt().coerceAtLeast(1) },
modifier = Modifier.width(100.dp)
)
}
Button(onClick = {
game.started = !game.started
if (game.started) {
game.start()
}
}) {
Text(if (game.started) "Stop" else "Start", fontSize = 40.sp)
}
if (game.started) {
Spacer(Modifier.padding(5.dp))
Button(onClick = {
game.togglePause()
}) {
Text(if (game.paused) "Resume" else "Pause", fontSize = 40.sp)
}
}
}
if (game.started) {
Box(modifier = Modifier
.fillMaxWidth()
.fillMaxHeight(0.5f)
.onSizeChanged {
game.size = it
}
) {
game.pieces.forEachIndexed { index, piece -> Piece(index, piece) }
}
}
LaunchedEffect(Unit) {
while (true) {
withFrameNanos {
if (game.started && !game.paused && !game.finished)
game.update(it)
}
}
}
}
}

54
examples/falling_balls/src/main/kotlin/Piece.kt
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@ -0,0 +1,54 @@
package org.jetbrains.compose.demo.falling
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.offset
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.shadow
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp
@Composable
fun Piece(index: Int, piece: PieceData) {
val boxSize = 40.dp
Box(
Modifier
.offset(boxSize * index * 5 / 3, piece.position.dp)
.shadow(30.dp)
.clip(CircleShape)
) {
Box(
Modifier
.size(boxSize, boxSize)
.background(if (piece.clicked) Color.Gray else piece.color)
.clickable(onClick = { piece.click() })
)
}
}
data class PieceData(val game: Game, val velocity: Float, val color: Color) {
var clicked by mutableStateOf(false)
var position by mutableStateOf(0f)
fun update(dt: Long) {
if (clicked) return
val delta = (dt / 1E8 * velocity).toFloat()
position = if (position < game.size.height) position + delta else 0f
}
fun click() {
if (!clicked && !game.paused) {
clicked = true
game.clicked(this)
}
}
}

10
examples/falling_balls/src/main/kotlin/main.kt
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package org.jetbrains.compose.demo.falling
import androidx.compose.desktop.Window
import androidx.compose.ui.unit.IntSize
fun main() =
Window(title = "Falling Balls", size = IntSize(800, 800)) {
FallingBallsGame()
}
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