Starting to impl hotbar screen for #37

api/src/main/kotlin/com/mattmx/ktgui/components/screen/InventoryHotbarScreen.kt

@@ -0,0 +1,43 @@
+package com.mattmx.ktgui.components.screen
+
+import com.mattmx.ktgui.components.button.GuiButton
+import com.mattmx.ktgui.event.EventCallback
+import com.mattmx.ktgui.event.ScrollHotbarEvent
+import net.kyori.adventure.text.Component
+import net.kyori.adventure.title.Title
+import org.bukkit.entity.Player
+import org.bukkit.event.inventory.InventoryType
+import org.bukkit.event.player.PlayerDropItemEvent
+import java.util.*
+
+open class InventoryHotbarScreen : GuiScreen(Component.empty(), type = InventoryType.PLAYER) {
+    val holding = hashMapOf<Int, (Player) -> Unit>()
+    val dropItem = EventCallback<PlayerDropItemEvent>()
+    val scroll = EventCallback<ScrollHotbarEvent>()
+    var startingHeldSlot = Optional.empty<Int>()
+        private set
+
+    override fun open(player: Player) {
+        TODO()
+    }
+
+    infix fun startingHeldSlot(slot: Int) = apply {
+        this.startingHeldSlot = Optional.of(slot)
+    }
+
+    infix fun GuiButton<*>.holding(block: Player.() -> Unit) = apply {
+        slots().forEach { slot -> holding[slot] = block }
+    }
+
+    infix fun GuiButton<*>.holdingSendActionBar(component: Component) = holding {
+        sendActionBar(component)
+    }
+
+    infix fun GuiButton<*>.holdingSendTitle(title: Title) = holding { showTitle(title) }
+
+    fun hotbarMiddle() = 4
+    fun hotbarLast() = 8
+}
+
+fun hotbar(block: InventoryHotbarScreen.() -> Unit) =
+    InventoryHotbarScreen().apply(block)

api/src/main/kotlin/com/mattmx/ktgui/event/ScrollHotbarEvent.kt

@@ -0,0 +1,10 @@
+package com.mattmx.ktgui.event
+
+import org.bukkit.entity.Player
+import org.bukkit.event.player.PlayerItemHeldEvent
+
+class ScrollHotbarEvent(
+    val player: Player,
+    val difference: Int,
+    val event: PlayerItemHeldEvent
+)

plugin/src/main/kotlin/com/mattmx/ktgui/KotlinGui.kt

@@ -66,7 +66,8 @@ class KotlinGui : JavaPlugin() {
             "config-gui" to { GuiConfigExample() },
             "refresh-scoreboard" to { signalScoreboardExample },
             "new-multi-screen-cram" to { NewCramMultiPageExample() },
-            "new-multi-screen" to { NewMultiPageExample() }
+            "new-multi-screen" to { NewMultiPageExample() },
+            "player-inventory" to { HotbarExample() }
         )
         GuiHookExample.registerListener(this)
 

plugin/src/main/kotlin/com/mattmx/ktgui/examples/HotbarExample.kt

@@ -0,0 +1,37 @@
+package com.mattmx.ktgui.examples
+
+import com.mattmx.ktgui.components.screen.hotbar
+import com.mattmx.ktgui.dsl.button
+import com.mattmx.ktgui.utils.not
+import org.bukkit.Material
+import org.bukkit.entity.Player
+import kotlin.math.abs
+
+class HotbarExample : Example {
+    val gui = hotbar {
+        var counter = 0
+        scroll {
+            event.isCancelled = false
+            counter += difference
+            player.sendActionBar(!"&fScrolled: $counter ${if (difference > 0) "&a+" else "&c-"}${abs(difference)}")
+
+            if (counter > 100) {
+                open(player)
+            }
+        }
+
+        button(Material.NETHER_STAR) {
+            named(!"&aServer Selector")
+            click.left { player.sendMessage(!"&7<Clicked>") }
+        } slot hotbarMiddle() holdingSendActionBar !"&7Click to change servers."
+
+        if (counter > 100) {
+            button(Material.PLAYER_HEAD) {
+                named(!"&aYou found a secret!")
+            } slot hotbarLast()
+        }
+
+    }
+
+    override fun run(player: Player) = gui.open(player)
+}