Quick add widget: 1×1 shaped + opening the editor on today (#435)

app/src/main/AndroidManifest.xml

@@ -352,6 +352,18 @@
                 android:resource="@xml/appwidget_info_month" />
         </receiver>
 
+        <receiver
+            android:name=".widget.quickadd.QuickAddWidgetReceiver"
+            android:label="@string/widget_quick_add_label"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/appwidget_info_quick_add" />
+        </receiver>
+
         <!-- Keeps both widgets fresh: the calendar provider broadcasts
              PROVIDER_CHANGED on any data change (external sync; the app's own
              writes redraw directly). The day boundary arrives as the app's own

app/src/main/java/de/jeanlucmakiola/calendula/widget/WidgetData.kt

@@ -256,3 +256,7 @@ private suspend fun Context.queryMonthSource(
         months = months,
     )
 }
+
+/** Today and the app theme, for a widget that draws no events. */
+internal suspend fun Context.loadToday(): Themed<LocalDate> =
+    Themed(today(systemZone()), widgetEntryPoint().settingsPrefs().widgetSettings.first().themeMode)

app/src/main/java/de/jeanlucmakiola/calendula/widget/WidgetKind.kt

@@ -10,6 +10,8 @@ import de.jeanlucmakiola.calendula.widget.agenda.AgendaWidget
 import de.jeanlucmakiola.calendula.widget.agenda.AgendaWidgetReceiver
 import de.jeanlucmakiola.calendula.widget.month.MonthWidget
 import de.jeanlucmakiola.calendula.widget.month.MonthWidgetReceiver
+import de.jeanlucmakiola.calendula.widget.quickadd.QuickAddWidget
+import de.jeanlucmakiola.calendula.widget.quickadd.QuickAddWidgetReceiver
 
 /** A content option a widget's config screen offers, besides background and theme. */
 enum class WidgetOption { RANGE, TEXT_SIZE, PAST_DISPLAY, SHOW_TODAY, CALENDARS }
@@ -37,11 +39,18 @@ enum class WidgetKind(
         setOf(WidgetOption.CALENDARS),
         DpSize(320.dp, 340.dp),
     ),
+    QUICK_ADD(
+        QuickAddWidgetReceiver::class.java,
+        R.string.widget_quick_add_label,
+        emptySet(),
+        DpSize(76.dp, 76.dp),
+    ),
     ;
 
     fun widget(): GlanceAppWidget = when (this) {
         AGENDA -> AgendaWidget()
         MONTH -> MonthWidget()
+        QUICK_ADD -> QuickAddWidget()
     }
 
     /** Whether this kind stores [AgendaWidgetOptions] of its own. */

app/src/main/java/de/jeanlucmakiola/calendula/widget/config/WidgetConfigScreen.kt

@@ -48,6 +48,7 @@ import de.jeanlucmakiola.calendula.widget.WidgetTheme
 import de.jeanlucmakiola.calendula.widget.agenda.AgendaWidgetContent
 import de.jeanlucmakiola.calendula.widget.agenda.metricsFor
 import de.jeanlucmakiola.calendula.widget.month.MonthWidgetContent
+import de.jeanlucmakiola.calendula.widget.quickadd.QuickAddWidgetContent
 import de.jeanlucmakiola.floret.components.GroupedChoiceRow
 import de.jeanlucmakiola.floret.components.GroupedHint
 import de.jeanlucmakiola.floret.components.GroupedRow
@@ -146,6 +147,8 @@ internal fun WidgetConfigScreen(
                                     AgendaWidgetContent(preview.data, state.appearance, state.appTheme, preview = true)
                                 is WidgetPreviewData.Month ->
                                     MonthWidgetContent(preview.source, preview.index, state.appearance, state.appTheme)
+                                is WidgetPreviewData.Today ->
+                                    QuickAddWidgetContent(preview.today, state.appearance, state.appTheme)
                             }
                         }
                     }

app/src/main/java/de/jeanlucmakiola/calendula/widget/config/WidgetConfigViewModel.kt

@@ -50,12 +50,14 @@ import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import kotlinx.datetime.DayOfWeek
+import kotlinx.datetime.LocalDate
 import java.util.Locale
 
 /** What the preview draws, loaded with the draft's options. */
 sealed interface WidgetPreviewData {
     data class Agenda(val data: AgendaWidgetData) : WidgetPreviewData
     data class Month(val source: MonthWidgetSource, val index: Int) : WidgetPreviewData
+    data class Today(val today: LocalDate) : WidgetPreviewData
 }
 
 /** The options being edited, applied to the preview as they change and written on save. */
@@ -226,6 +228,7 @@ class WidgetConfigViewModel @Inject constructor(
                 val source = context.loadThemedMonthSource(monthWindowCenter(index), draft.hiddenCalendars)
                 WidgetPreviewData.Month(source.content, index)
             }
+            WidgetKind.QUICK_ADD -> WidgetPreviewData.Today(today(systemZone()))
         }
     }
 

app/src/main/java/de/jeanlucmakiola/calendula/widget/quickadd/QuickAddWidget.kt

@@ -0,0 +1,84 @@
+package de.jeanlucmakiola.calendula.widget.quickadd
+
+import android.content.Context
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.unit.dp
+import androidx.datastore.preferences.core.Preferences
+import androidx.glance.GlanceId
+import androidx.glance.GlanceModifier
+import androidx.glance.GlanceTheme
+import androidx.glance.ImageProvider
+import androidx.glance.LocalContext
+import androidx.glance.LocalSize
+import androidx.glance.action.clickable
+import androidx.glance.appwidget.GlanceAppWidget
+import androidx.glance.appwidget.SizeMode
+import androidx.glance.appwidget.action.actionStartActivity
+import androidx.glance.appwidget.provideContent
+import androidx.glance.currentState
+import androidx.glance.layout.Alignment
+import androidx.glance.layout.Box
+import androidx.glance.layout.fillMaxSize
+import androidx.glance.state.PreferencesGlanceStateDefinition
+import de.jeanlucmakiola.calendula.MainActivity
+import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.widget.CalendulaWidgetRoot
+import de.jeanlucmakiola.calendula.widget.WidgetAppearance
+import de.jeanlucmakiola.calendula.widget.CalendulaWidgetReceiver
+import de.jeanlucmakiola.calendula.widget.loadToday
+import de.jeanlucmakiola.calendula.widget.widgetAppearance
+import de.jeanlucmakiola.floret.glance.WidgetData
+import de.jeanlucmakiola.floret.glance.WidgetShape
+import de.jeanlucmakiola.floret.glance.WidgetShapedIconButton
+import de.jeanlucmakiola.floret.glance.currentRefreshStamp
+import de.jeanlucmakiola.floret.glance.refreshStamp
+import de.jeanlucmakiola.floret.prefs.ThemeMode
+import kotlinx.datetime.LocalDate
+
+/**
+ * 1×1 quick add (#435): one shaped "+" that opens the new-event editor on
+ * today, with the same defaults as the app's own new-event button.
+ */
+class QuickAddWidget : GlanceAppWidget() {
+
+    override val stateDefinition = PreferencesGlanceStateDefinition
+
+    // Exact: the shape fills whatever square the launcher gives it.
+    override val sizeMode = SizeMode.Exact
+
+    override suspend fun provideGlance(context: Context, id: GlanceId) {
+        val widgetData = WidgetData(context.loadToday(), refreshStamp(context, id))
+        provideContent {
+            // The rollover moves the stamp, so the editor opens on the new day.
+            val loaded = widgetData.current(currentRefreshStamp()) { context.loadToday() }
+            QuickAddWidgetContent(loaded.content, currentState<Preferences>().widgetAppearance, loaded.appTheme)
+        }
+    }
+}
+
+class QuickAddWidgetReceiver : CalendulaWidgetReceiver() {
+    override val glanceAppWidget: GlanceAppWidget = QuickAddWidget()
+}
+
+@Composable
+internal fun QuickAddWidgetContent(today: LocalDate, appearance: WidgetAppearance, appTheme: ThemeMode) {
+    CalendulaWidgetRoot(appearance, appTheme) {
+        val context = LocalContext.current
+        val size = LocalSize.current
+        val action = actionStartActivity(MainActivity.openCreateIntent(context, today))
+        Box(
+            modifier = GlanceModifier.fillMaxSize().clickable(action),
+            contentAlignment = Alignment.Center,
+        ) {
+            WidgetShapedIconButton(
+                shape = WidgetShape.SUNNY,
+                icon = ImageProvider(R.drawable.ic_widget_add),
+                contentDescription = context.getString(R.string.widget_new_event),
+                action = action,
+                color = GlanceTheme.colors.primary,
+                iconTint = GlanceTheme.colors.onPrimary,
+                size = (minOf(size.width, size.height) - 12.dp).coerceIn(36.dp, 120.dp),
+            )
+        }
+    }
+}

app/src/main/res/layout/widget_preview_quick_add.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Static mock shown in the widget picker (android:previewLayout). -->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/preview_widget_bg"
+    android:padding="6dp">
+
+    <ImageView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:importantForAccessibility="no"
+        android:src="@drawable/floret_widget_shape_sunny"
+        android:tint="@color/widget_preview_primary"
+        tools:ignore="UseAppTint" />
+
+    <ImageView
+        android:layout_width="24dp"
+        android:layout_height="24dp"
+        android:layout_gravity="center"
+        android:importantForAccessibility="no"
+        android:src="@drawable/ic_widget_add"
+        android:tint="@color/widget_preview_on_primary"
+        tools:ignore="UseAppTint" />
+</FrameLayout>

app/src/main/res/values/strings.xml

@@ -435,6 +435,7 @@
     <string name="widget_agenda_title">Upcoming</string>
     <string name="widget_agenda_label">Calendula agenda</string>
     <string name="widget_month_label">Calendula month</string>
+    <string name="widget_quick_add_label">Calendula quick add</string>
     <string name="widget_refresh">Refresh</string>
     <string name="widget_new_event">New event</string>
     <string name="widget_needs_permission">Open Calendula to grant calendar access</string>

app/src/main/res/xml/appwidget_info_quick_add.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    android:minWidth="40dp"
+    android:minHeight="40dp"
+    android:targetCellWidth="1"
+    android:targetCellHeight="1"
+    android:resizeMode="horizontal|vertical"
+    android:widgetCategory="home_screen"
+    android:configure="de.jeanlucmakiola.calendula.widget.config.WidgetConfigActivity"
+    android:widgetFeatures="reconfigurable"
+    android:description="@string/widget_quick_add_label"
+    android:updatePeriodMillis="1800000"
+    android:previewLayout="@layout/widget_preview_quick_add"
+    android:initialLayout="@layout/glance_default_loading_layout" />