add ui/List

1 files changed, 90 insertions, 0 deletions

diff --git a/core/src/ch/asynk/rustanddust/ui/List.java b/core/src/ch/asynk/rustanddust/ui/List.java
new file mode 100644
index 0000000..ad1d786
--- /dev/null
+++ b/core/src/ch/asynk/rustanddust/ui/List.java
@@ -0,0 +1,90 @@
+package ch.asynk.rustanddust.ui;
+
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.graphics.GL20;
+import com.badlogic.gdx.graphics.glutils.HdpiUtils;
+import com.badlogic.gdx.graphics.g2d.Batch;
+import com.badlogic.gdx.graphics.g2d.BitmapFont;
+import com.badlogic.gdx.graphics.g2d.GlyphLayout;
+
+import ch.asynk.rustanddust.RustAndDust;
+import ch.asynk.rustanddust.engine.util.Collection;
+
+public class List extends Widget
+{
+    public interface ListElement
+    {
+        public String s();
+    }
+
+    private BitmapFont font;
+    private GlyphLayout layout;
+    private float itemHeight;
+    private Integer idx;
+    private Bg selected;
+    private Collection<ListElement> items;
+
+    public List(RustAndDust game)
+    {
+        this(game, 15f);
+    }
+
+    public List(RustAndDust game, float padding)
+    {
+        super();
+        this.font = game.font;
+        this.padding = padding;
+        this.layout = new GlyphLayout();
+        this.idx = null;
+        this.selected = new Bg(game.getUiRegion(game.UI_SELECT));
+    }
+
+    @Override
+    public boolean hit(float x, float y)
+    {
+        float t = (getTop() - (int) padding);
+        idx = (int) Math.floor((t - y) / itemHeight);
+        if ((idx >= 0) && (idx < items.size()))
+            selected.setPosition(rect.x, (t - itemHeight - (idx * itemHeight)), rect.width, (itemHeight + padding));
+        return true;
+    }
+
+    public void setItems(int clipN, Collection<ListElement> items)
+    {
+        this.items = items;
+        compute();
+    }
+
+    private void compute()
+    {
+        float w = 0f;
+        for (ListElement e: items) {
+            layout.setText(font, e.s());
+            if (layout.width > w) w = layout.width;
+        }
+        itemHeight = (layout.height + padding);
+
+        rect.width = w + (2 * padding);
+        rect.height = padding + (itemHeight * items.size());
+    }
+
+    @Override
+    public void dispose()
+    {
+    }
+
+    @Override
+    public void draw(Batch batch)
+    {
+        if (!visible) return;
+
+        if (idx != null)
+            selected.draw(batch);
+        float x = rect.x + padding;
+        float y = rect.y + rect.height - padding;
+        for (ListElement e : items) {
+            font.draw(batch, e.s(), x, y);
+            y -= itemHeight;
+        }
+    }
+}