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| @@ -0,0 +1,4 @@ | ||
| root = true | ||
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| [*.{kt,kts}] | ||
| ktlint_function_naming_ignore_when_annotated_with=Composable |
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@@ -106,6 +106,7 @@ kotlin { | |
| } | ||
| } | ||
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| android { | ||
| namespace = "com.wojciechosak.calendar" | ||
| compileSdk = 34 | ||
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86 changes: 86 additions & 0 deletions
86
calendar/src/commonMain/kotlin/io/wojciechosak/calendar/animation/CalendarAnimator.kt
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| @@ -0,0 +1,86 @@ | ||
| package io.wojciechosak.calendar.animation | ||
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| import androidx.compose.animation.core.AnimationSpec | ||
| import androidx.compose.animation.core.Spring | ||
| import androidx.compose.animation.core.spring | ||
| import androidx.compose.foundation.ExperimentalFoundationApi | ||
| import androidx.compose.foundation.pager.PagerState | ||
| import io.wojciechosak.calendar.config.CalendarConstants.INITIAL_PAGE_INDEX | ||
| import io.wojciechosak.calendar.utils.copy | ||
| import kotlinx.datetime.DateTimeUnit | ||
| import kotlinx.datetime.LocalDate | ||
| import kotlinx.datetime.daysUntil | ||
| import kotlinx.datetime.periodUntil | ||
| import kotlinx.datetime.plus | ||
| import kotlin.math.floor | ||
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| @OptIn(ExperimentalFoundationApi::class) | ||
| class CalendarAnimator(private val startDate: LocalDate) { | ||
| enum class AnimationMode { | ||
| MONTH, | ||
| DAY, | ||
| WEEK, | ||
| } | ||
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| private var pagerState: PagerState? = null | ||
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| private var mode: AnimationMode = AnimationMode.MONTH | ||
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| fun updatePagerState(pagerState: PagerState) { | ||
| this.pagerState = pagerState | ||
| } | ||
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| internal fun setAnimationMode(mode: AnimationMode) { | ||
| this.mode = mode | ||
| } | ||
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| suspend fun animateTo( | ||
| target: LocalDate, | ||
| pageOffsetFraction: Float = 0f, | ||
| animationSpec: AnimationSpec<Float> = spring(stiffness = Spring.StiffnessMediumLow), | ||
| ) { | ||
| val initialPage = pagerState?.initialPage ?: INITIAL_PAGE_INDEX | ||
| val currentDate = | ||
| when (mode) { | ||
| AnimationMode.MONTH -> | ||
| startDate.plus( | ||
| (pagerState?.targetPage ?: 0) - initialPage, | ||
| DateTimeUnit.MONTH, | ||
| ) | ||
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| AnimationMode.DAY -> | ||
| startDate.plus( | ||
| (pagerState?.targetPage ?: 0) - initialPage, | ||
| DateTimeUnit.DAY, | ||
| ) | ||
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| AnimationMode.WEEK -> | ||
| startDate.plus( | ||
| (pagerState?.targetPage ?: 0) - initialPage, | ||
| DateTimeUnit.WEEK, | ||
| ) | ||
| } | ||
| val targetDate = | ||
| target.run { | ||
| if (mode == AnimationMode.MONTH) { | ||
| copy(day = currentDate.dayOfMonth) | ||
| } else { | ||
| this | ||
| } | ||
| } | ||
| val diff = currentDate.periodUntil(targetDate) | ||
| val offset = | ||
| when (mode) { | ||
| AnimationMode.MONTH -> diff.months + diff.years * 12 | ||
| AnimationMode.DAY -> currentDate.daysUntil(targetDate) | ||
| AnimationMode.WEEK -> floor(currentDate.daysUntil(targetDate) / 7f).toInt() | ||
| } | ||
| if (initialPage + offset > 0) { | ||
| pagerState?.animateScrollToPage( | ||
| page = (pagerState?.settledPage ?: initialPage) + offset, | ||
| pageOffsetFraction = pageOffsetFraction, | ||
| animationSpec = animationSpec, | ||
| ) | ||
| } | ||
| } | ||
| } |
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5 changes: 5 additions & 0 deletions
5
calendar/src/commonMain/kotlin/io/wojciechosak/calendar/config/CalendarConstants.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| package io.wojciechosak.calendar.config | ||
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| object CalendarConstants { | ||
| internal const val INITIAL_PAGE_INDEX = Int.MAX_VALUE / 2 | ||
| } |
17 changes: 17 additions & 0 deletions
17
calendar/src/commonMain/kotlin/io/wojciechosak/calendar/config/MonthYear.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,17 @@ | ||
| package io.wojciechosak.calendar.config | ||
|
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| import io.wojciechosak.calendar.utils.toMonthYear | ||
| import kotlinx.datetime.DateTimeUnit | ||
| import kotlinx.datetime.LocalDate | ||
| import kotlinx.datetime.Month | ||
| import kotlinx.datetime.plus | ||
|
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| data class MonthYear(val month: Month, val year: Int) | ||
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| fun MonthYear.toLocalDate() = LocalDate(year, month, 1) | ||
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| fun MonthYear.monthOffset(monthOffset: Int) = | ||
| this | ||
| .toLocalDate() | ||
| .plus(monthOffset, DateTimeUnit.MONTH) | ||
| .toMonthYear() |
5 changes: 0 additions & 5 deletions
5
calendar/src/commonMain/kotlin/io/wojciechosak/calendar/config/YearMonth.kt
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32 changes: 22 additions & 10 deletions
32
calendar/src/commonMain/kotlin/io/wojciechosak/calendar/view/VerticalCalendarView.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,34 +1,46 @@ | ||
| package io.wojciechosak.calendar.view | ||
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| import androidx.compose.foundation.ExperimentalFoundationApi | ||
| import androidx.compose.foundation.layout.Column | ||
| import androidx.compose.foundation.layout.PaddingValues | ||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.pager.PageSize | ||
| import androidx.compose.foundation.pager.VerticalPager | ||
| import androidx.compose.foundation.pager.rememberPagerState | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.LaunchedEffect | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.unit.dp | ||
| import io.wojciechosak.calendar.animation.CalendarAnimator | ||
| import io.wojciechosak.calendar.config.CalendarConstants.INITIAL_PAGE_INDEX | ||
| import kotlinx.datetime.LocalDate | ||
|
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| @OptIn(ExperimentalFoundationApi::class) | ||
| @Composable | ||
| fun VerticalCalendarView( | ||
| startDate: LocalDate, | ||
| calendarAnimator: CalendarAnimator = CalendarAnimator(startDate), | ||
| modifier: Modifier = Modifier, | ||
| pageSize: PageSize = PageSize.Fill, | ||
| contentPadding: PaddingValues = PaddingValues(0.dp), | ||
| calendarView: @Composable (monthOffset: Int) -> Unit, | ||
| ) { | ||
| val pagerState = | ||
| rememberPagerState( | ||
| initialPage = INITIAL_PAGE_INDEX, | ||
| pageCount = { Int.MAX_VALUE }, | ||
| ) | ||
| LaunchedEffect(pagerState) { | ||
| calendarAnimator.setAnimationMode(CalendarAnimator.AnimationMode.MONTH) | ||
| calendarAnimator.updatePagerState(pagerState) | ||
| } | ||
| VerticalPager( | ||
| state = | ||
| rememberPagerState( | ||
| initialPage = Int.MAX_VALUE / 2, | ||
| pageCount = { Int.MAX_VALUE }, | ||
| ), | ||
| state = pagerState, | ||
| modifier = modifier.fillMaxWidth(), | ||
| pageSize = pageSize, | ||
| beyondBoundsPageCount = 0, | ||
| contentPadding = contentPadding, | ||
| ) { | ||
| val index = it - Int.MAX_VALUE / 2 | ||
| Column { | ||
| calendarView(index) | ||
| } | ||
| val index = it - INITIAL_PAGE_INDEX | ||
| calendarView(index) | ||
| } | ||
| } |
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