City construction picking now done through a scroll on the city screen, like in the original =D

Also resolved #417 on the way

core/src/com/unciv/models/gamebasics/Building.kt

@@ -156,6 +156,7 @@ class Building : NamedStats(), IConstruction{
     }
 
     override fun getGoldCost(adoptedPolicies: HashSet<String>): Int {
+        // https://forums.civfanatics.com/threads/rush-buying-formula.393892/
         var cost = Math.pow((30 * getProductionCost(adoptedPolicies)).toDouble(), 0.75) * (1 + hurryCostModifier / 100)
         if (adoptedPolicies.contains("Mercantilism")) cost *= 0.75
         if (adoptedPolicies.contains("Patronage")) cost *= 0.5

core/src/com/unciv/ui/cityscreen/CityScreen.kt

@@ -38,7 +38,7 @@ class CityScreen(internal val city: CityInfo) : CameraStageBaseScreen() {
         tileTable.background = ImageGetter.getBackground(tableBackgroundColor)
 
         var buildingsTableContainer = Table()
-        buildingsTableContainer.pad(20f)
+        buildingsTableContainer.pad(3f)
         buildingsTableContainer.background = ImageGetter.getBackground(tableBackgroundColor)
         cityInfoTable.update()
         val buildingsScroll = ScrollPane(cityInfoTable)
@@ -46,8 +46,8 @@ class CityScreen(internal val city: CityInfo) : CameraStageBaseScreen() {
                 .height(stage.height / 2)
 
         buildingsTableContainer = buildingsTableContainer.addBorder(2f, Color.WHITE)
-        buildingsTableContainer.setPosition(stage.width - buildingsTableContainer.width-20,
+        buildingsTableContainer.setPosition(stage.width - buildingsTableContainer.width-5,
-                stage.height - buildingsTableContainer.height-20)
+                stage.height - buildingsTableContainer.height-5)
 
         //constructionsTable.background = ImageGetter.getBackground(tableBackgroundColor)
         //val constructionsTableWithBorder = con
@@ -70,7 +70,7 @@ class CityScreen(internal val city: CityInfo) : CameraStageBaseScreen() {
 
         topCityStatsTable.remove()
         topCityStatsTable = getCityStatsTable()
-        topCityStatsTable.setPosition(20f, stage.height-20-topCityStatsTable.height)
+        topCityStatsTable.setPosition(5f, stage.height-5-topCityStatsTable.height)
         stage.addActor(topCityStatsTable)
 
         if (city.getCenterTile().getTilesAtDistance(4).isNotEmpty()){
@@ -315,7 +315,7 @@ class CityScreen(internal val city: CityInfo) : CameraStageBaseScreen() {
         }
 
         tileTable=tileTable.addBorder(2f, Color.WHITE)
-        tileTable.setPosition(stage.width - 10f - tileTable.width, 10f)
+        tileTable.setPosition(stage.width - 5f - tileTable.width, 5f)
     }
 
     companion object {

core/src/com/unciv/ui/cityscreen/ConstructionsTable.kt

@@ -1,112 +1,171 @@
 package com.unciv.ui.cityscreen
 
 import com.badlogic.gdx.graphics.Color
-import com.badlogic.gdx.scenes.scene2d.ui.*
+import com.badlogic.gdx.scenes.scene2d.Touchable
-import com.unciv.UnCivGame
+import com.badlogic.gdx.scenes.scene2d.ui.Label
+import com.badlogic.gdx.scenes.scene2d.ui.ScrollPane
+import com.badlogic.gdx.scenes.scene2d.ui.Table
+import com.badlogic.gdx.scenes.scene2d.ui.TextButton
+import com.badlogic.gdx.utils.Align
+import com.unciv.logic.city.CityInfo
 import com.unciv.logic.city.SpecialConstruction
 import com.unciv.models.gamebasics.Building
 import com.unciv.models.gamebasics.GameBasics
 import com.unciv.models.gamebasics.tr
-import com.unciv.ui.pickerscreens.ConstructionPickerScreen
+import com.unciv.models.gamebasics.unit.BaseUnit
 import com.unciv.ui.utils.*
 
 class ConstructionsTable(val cityScreen: CityScreen) : Table(CameraStageBaseScreen.skin){
 
-    private fun getProductionButton(production: String, buttonText: String,
+    var constructionScrollPane:ScrollPane?=null
-                                    description: String?, rightSideButtonText: String): Button {
+
-        val productionTextButton = Button(CameraStageBaseScreen.skin)
+    private fun getProductionButton(construction: String, buttonText: String): Table {
-        productionTextButton.add(ImageGetter.getConstructionImage(production)).size(40f).padRight(5f)
+        val pickProductionButton = Table()
-        productionTextButton.add(Label(buttonText, CameraStageBaseScreen.skin).setFontColor(Color.WHITE))
+        pickProductionButton.touchable = Touchable.enabled
-        productionTextButton.onClick {
+        pickProductionButton.align(Align.left)
-            cityScreen.city.cityConstructions.currentConstruction = production
+        pickProductionButton.pad(5f)
+
+        if(cityScreen.city.cityConstructions.currentConstruction==construction)
+            pickProductionButton.background = ImageGetter.getBackground(Color.GREEN.cpy().lerp(Color.BLACK,0.5f))
+        else
+            pickProductionButton.background = ImageGetter.getBackground(Color.BLACK)
+
+        pickProductionButton.add(ImageGetter.getConstructionImage(construction).surroundWithCircle(40f)).padRight(10f)
+        pickProductionButton.add(Label(buttonText, CameraStageBaseScreen.skin).setFontColor(Color.WHITE))
+        pickProductionButton.onClick {
+            cityScreen.city.cityConstructions.currentConstruction = construction
             update()
         }
-        if(production==cityScreen.city.cityConstructions.currentConstruction)
+        if(construction==cityScreen.city.cityConstructions.currentConstruction)
-            productionTextButton.color= Color.GREEN
+            pickProductionButton.color= Color.GREEN
-        return productionTextButton
+        return pickProductionButton
     }
 
-
     fun update() {
         val city = cityScreen.city
-        val buttonScale = 0.9f
+        pad(10f)
-        pad(20f)
         columnDefaults(0).padRight(10f)
         clear()
 
-        val cityConstructions = city.cityConstructions
+        addConstructionPickerScrollpane(city)
-        val regularBuildings = VerticalGroup().space(10f)
+        addCurrentConstructionTable(city)
-        val wonders = VerticalGroup().space(10f)
-        val units = VerticalGroup().space(10f)
-        val specials = VerticalGroup().space(10f)
 
-        for (unit in GameBasics.Units.values.filter { it.isBuildable(cityConstructions)}) {
+        pack()
-            units.addActor(getProductionButton(unit.name,
-                    unit.name + "\r\n" + cityConstructions.turnsToConstruction(unit.name) + " {turns}".tr(),
-                    unit.getDescription(true), "Train [${unit.name}]".tr()))
     }
 
+    private fun Table.addCategory(title:String,list:ArrayList<Table>){
+        if(list.isEmpty()) return
+        val titleTable = Table()
+        titleTable.background = ImageGetter.getBackground(ImageGetter.getBlue())
+        titleTable.add(Label(title.tr(),CameraStageBaseScreen.skin))
+
+        addSeparator()
+        add(titleTable).fill().row()
+        addSeparator()
+
+        for(table in list) {
+            add(table).fill().row()
+            if(table != list.last()) addSeparator()
+        }
+    }
+
+    private fun addConstructionPickerScrollpane(city: CityInfo) {
+        val cityConstructions = city.cityConstructions
+
+        val constructionPickerTable = Table()
+        constructionPickerTable.background = ImageGetter.getBackground(Color.BLACK)
+
+        val units = ArrayList<Table>()
+        for (unit in GameBasics.Units.values.filter { it.isBuildable(cityConstructions) })
+            units += getProductionButton(unit.name,
+                    unit.name + "\r\n" + cityConstructions.turnsToConstruction(unit.name) + " {turns}".tr())
+
+        constructionPickerTable.addCategory("Units",units)
+
+        val buildableWonders = ArrayList<Table>()
+        val buildableBuildings = ArrayList<Table>()
         for (building in GameBasics.Buildings.values) {
             if (!building.isBuildable(cityConstructions) && building.name != cityConstructions.currentConstruction) continue
             val productionTextButton = getProductionButton(building.name,
-                    building.name + "\r\n" + cityConstructions.turnsToConstruction(building.name) + " {turns}".tr(),
+                    building.name + "\r\n" + cityConstructions.turnsToConstruction(building.name) + " {turns}".tr())
-                    building.getDescription(true, city.civInfo.policies.getAdoptedPolicies()),
-                    "Build [${building.name}]".tr())
             if (building.isWonder)
-                wonders.addActor(productionTextButton)
+                buildableWonders += productionTextButton
             else
-                regularBuildings.addActor(productionTextButton)
+                buildableBuildings += productionTextButton
         }
 
+        constructionPickerTable.addCategory("Wonders",buildableWonders)
+        constructionPickerTable.addCategory("Buildings",buildableBuildings)
 
+        val specialConstructions = ArrayList<Table>()
         for (specialConstruction in SpecialConstruction.getSpecialConstructions().filter { it.isBuildable(cityConstructions) }) {
-            specials.addActor(getProductionButton(specialConstruction.name, "Produce [${specialConstruction.name}]".tr(),
+            specialConstructions += getProductionButton(specialConstruction.name,
-                    specialConstruction.description, "Produce [${specialConstruction.name}]".tr()))
+                    "Produce [${specialConstruction.name}]".tr())
         }
-
+        constructionPickerTable.addCategory("Other",specialConstructions)
-        val constructionPickerTable = Table()
-        constructionPickerTable.add(ExpanderTab("Units".tr(),skin).apply { this.innerTable.add(units) }).row()
-        constructionPickerTable.add(ExpanderTab("Buildings".tr(),skin).apply { this.innerTable.add(regularBuildings) }).row()
-        constructionPickerTable.add(ExpanderTab("Wonders".tr(),skin).apply { this.innerTable.add(wonders) }).row()
-        constructionPickerTable.add(ExpanderTab("Special".tr(),skin).apply { this.innerTable.add(specials) }).row()
 
         val scrollPane = ScrollPane(constructionPickerTable, skin)
-        add(scrollPane).height(cityScreen.stage.height/2).row()
 
-        val buildingPickButton = Button(CameraStageBaseScreen.skin)
+        // This is to keep the same amount of scrolling on the construction picker scroll between refresh()es
-        val buildingText = city.cityConstructions.getCityProductionTextForCityButton()
+        if(constructionScrollPane!=null){
-        buildingPickButton.add(ImageGetter.getConstructionImage(city.cityConstructions.currentConstruction))
+            scrollPane.layout()
-                .size(30f).pad(5f)
+            scrollPane.scrollY = constructionScrollPane!!.scrollY
-        buildingPickButton.add(Label(buildingText , CameraStageBaseScreen.skin).setFontColor(Color.WHITE))
+            scrollPane.updateVisualScroll()
-        buildingPickButton.onClick {
-            UnCivGame.Current.screen = ConstructionPickerScreen(city)
-            cityScreen.dispose()
         }
-        buildingPickButton.pack()
+        constructionScrollPane = scrollPane
 
-        add(buildingPickButton).colspan(2).pad(10f)
+        add(scrollPane).height(stage.height / 3).minWidth(stage.width/4).row()
-                .size(buildingPickButton.width * buttonScale, buildingPickButton.height * buttonScale)
+    }
 
-
+    private fun addCurrentConstructionTable(city: CityInfo) {
-        // https://forums.civfanatics.com/threads/rush-buying-formula.393892/
         val construction = city.cityConstructions.getCurrentConstruction()
+
+        row()
+        val purchaseConstructionButton: TextButton
         if (construction !is SpecialConstruction &&
                 !(construction is Building && construction.isWonder)) {
-            row()
+
             val buildingGoldCost = construction.getGoldCost(city.civInfo.policies.getAdoptedPolicies())
-            val buildingBuyButton = TextButton("Buy for [$buildingGoldCost] gold".tr(), CameraStageBaseScreen.skin)
+            purchaseConstructionButton = TextButton("Buy for [$buildingGoldCost] gold".tr(), CameraStageBaseScreen.skin)
-            buildingBuyButton.onClick("coin") {
+            purchaseConstructionButton.onClick("coin") {
                 city.cityConstructions.purchaseBuilding(city.cityConstructions.currentConstruction)
                 update()
             }
             if (buildingGoldCost > city.civInfo.gold) {
-                buildingBuyButton.disable()
+                purchaseConstructionButton.disable()
             }
-            add(buildingBuyButton).colspan(2).pad(10f)
+        } else {
-                    .size(buildingBuyButton.width * buttonScale, buildingBuyButton.height * buttonScale)
+            purchaseConstructionButton = TextButton("Buy", CameraStageBaseScreen.skin)
+            purchaseConstructionButton.disable()
+        }
+        add(purchaseConstructionButton).pad(10f).row()
+
+
+        val currentConstructionTable = Table()
+        currentConstructionTable.background = ImageGetter.getBackground(ImageGetter.getBlue().lerp(Color.BLACK,0.5f))
+        currentConstructionTable.pad(10f)
+
+        currentConstructionTable.add(ImageGetter.getConstructionImage(city.cityConstructions.currentConstruction))
+                .size(30f).pad(5f)
+
+        val buildingText = city.cityConstructions.getCityProductionTextForCityButton()
+        currentConstructionTable.add(Label(buildingText, CameraStageBaseScreen.skin).setFontColor(Color.WHITE)).row()
+
+        val currentConstruction = city.cityConstructions.getCurrentConstruction()
+        val description: String
+        if (currentConstruction is BaseUnit)
+            description = currentConstruction.getDescription(true)
+        else if (currentConstruction is Building)
+            description = currentConstruction.getDescription(true, city.civInfo.policies.adoptedPolicies)
+        else description = currentConstruction.description
+
+        val descriptionLabel = Label(description, CameraStageBaseScreen.skin)
+        descriptionLabel.setWrap(true)
+        descriptionLabel.width = stage.width / 4
+        val descriptionScroll = ScrollPane(descriptionLabel)
+        currentConstructionTable.add(descriptionScroll).colspan(2).width(stage.width / 4).height(stage.height / 8)
+
+        add(currentConstructionTable.addBorder(2f, Color.WHITE))
     }
 
-        setPosition(10f, 10f)
-        pack()
-    }
 }

core/src/com/unciv/ui/cityscreen/ExpanderTab.kt

@@ -22,7 +22,7 @@ class ExpanderTab(private val title:String,skin: Skin): Table(skin){
             if(isOpen) close()
             else open()
         }
-        add(toggle).row()
+        add(toggle).fill().row()
         tab.add(innerTable).pad(10f)
         add(tab)
     }

core/src/com/unciv/ui/utils/CameraStageBaseScreen.kt

@@ -147,7 +147,7 @@ fun Actor.addBorder(size:Float,color:Color):Table{
     val table = Table()
     table.pad(size)
     table.background = ImageGetter.getBackground(color)
-    table.add(this)
+    table.add(this).fill()
     table.pack()
     return table
 }