commonMain.com.kizitonwose.calendar.compose.weekcalendar.WeekCalendar.kt Maven / Gradle / Ivy

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A highly customizable calendar library for Compose Multiplatform, backed by LazyRow/LazyColumn.

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package com.kizitonwose.calendar.compose.weekcalendar

import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxScope
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.IntrinsicSize
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.lazy.LazyRow
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clipToBounds
import com.kizitonwose.calendar.compose.CalendarDefaults.flingBehavior
import com.kizitonwose.calendar.core.Week
import com.kizitonwose.calendar.core.WeekDay
import com.kizitonwose.calendar.core.format.toIso8601String

@Composable
internal fun WeekCalendarImpl(
    modifier: Modifier,
    state: WeekCalendarState,
    calendarScrollPaged: Boolean,
    userScrollEnabled: Boolean,
    reverseLayout: Boolean,
    contentPadding: PaddingValues,
    dayContent: @Composable BoxScope.(WeekDay) -> Unit,
    weekHeader: (@Composable ColumnScope.(Week) -> Unit)? = null,
    weekFooter: (@Composable ColumnScope.(Week) -> Unit)? = null,
) {
    LazyRow(
        modifier = modifier,
        state = state.listState,
        flingBehavior = flingBehavior(calendarScrollPaged, state.listState),
        userScrollEnabled = userScrollEnabled,
        reverseLayout = reverseLayout,
        contentPadding = contentPadding,
    ) {
        items(
            count = state.weekIndexCount,
            key = { offset -> state.store[offset].days.first().date.toIso8601String() },
        ) { offset ->
            val week = state.store[offset]
            Column(
                modifier = Modifier
                    .then(
                        if (calendarScrollPaged) {
                            Modifier.fillParentMaxWidth()
                        } else {
                            Modifier.width(IntrinsicSize.Max)
                        },
                    ),
            ) {
                weekHeader?.invoke(this, week)
                Row {
                    for (date in week.days) {
                        Box(
                            modifier = Modifier
                                .then(if (calendarScrollPaged) Modifier.weight(1f) else Modifier)
                                .clipToBounds(),
                        ) {
                            dayContent(date)
                        }
                    }
                }
                weekFooter?.invoke(this, week)
            }
        }
    }
}