Feature/countdown (#54)

* v1

* fixes #20

* code review comments

* update version

* fix aliases

1 files changed, 102 insertions, 0 deletions

diff --git a/src/main/java/de/torui/coflsky/minecraft_integration/CountdownTimer.java b/src/main/java/de/torui/coflsky/minecraft_integration/CountdownTimer.java
new file mode 100644
index 0000000..9c63627
--- /dev/null
+++ b/src/main/java/de/torui/coflsky/minecraft_integration/CountdownTimer.java
@@ -0,0 +1,102 @@
+package de.torui.coflsky;
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.FontRenderer;
+import net.minecraft.client.gui.GuiChat;
+import net.minecraft.client.gui.ScaledResolution;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.client.settings.KeyBinding;
+import net.minecraftforge.fml.client.registry.ClientRegistry;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import net.minecraftforge.fml.common.gameevent.InputEvent;
+import net.minecraftforge.fml.common.gameevent.TickEvent;
+import de.torui.coflsky.commands.models.TimerData;
+import org.lwjgl.input.Keyboard;
+
+import java.util.Locale;
+
+public class CountdownTimer {
+    private static Minecraft mc = Minecraft.getMinecraft();
+    private static FontRenderer fr = mc.fontRendererObj;
+
+    private static long currentEndTime;
+    private static int currentWidth;
+    private static int currentHeight;
+    private static double currentScale;
+    private static String currentPrefix;
+    private static int currentPrecision;
+
+    public CountdownTimer() {
+    }
+
+    public static void onRenderTick(TickEvent.RenderTickEvent event) {
+        if (mc.currentScreen == null || mc.currentScreen instanceof GuiChat) // will only draw the Timer while no GUI or the Chat is open
+            if (currentEndTime - System.currentTimeMillis() > 0)
+                drawTimer();
+    }
+
+    /**
+     * @param seconds          will start a timer starting at seconds
+     * @param widthPercentage  width in correlation to the window size
+     * @param heightPercentage height in correlation to the window size
+     * @param fontScale        scales the text size by factor (1 = no change)
+     */
+    public static void startCountdown(double seconds, int widthPercentage, int heightPercentage, double fontScale) {
+        startCountdown(seconds, widthPercentage, heightPercentage, fontScale, "", 4);
+    }
+
+    /**
+     * @param seconds          will start a timer starting at seconds
+     * @param widthPercentage  width in correlation to the window size
+     * @param heightPercentage height in correlation to the window size
+     * @param fontScale        scales the text size by factor (1 = no change)
+     * @param prefix           will put that text infront of the seconds (supports color codes using §)
+     * @param maxPrecision     length of the seconds in the timer
+     */
+    public static void startCountdown(double seconds, int widthPercentage, int heightPercentage, double fontScale, String prefix, int maxPrecision) {
+		System.out.println("###Starting countdown " + seconds);
+        currentEndTime = (long) (System.currentTimeMillis() + (seconds * 1000));
+        currentWidth = widthPercentage;
+        currentHeight = heightPercentage;
+        currentScale = fontScale;
+        currentPrefix = prefix;
+        currentPrecision = maxPrecision;
+    }
+
+    public static void startCountdown(TimerData data) {
+        startCountdown(data.seconds, data.width, data.height, data.scale, data.prefix, data.maxPrecision );
+    }
+
+    private static void drawTimer() {
+        long curMillis = currentEndTime - System.currentTimeMillis();
+        String render = getStringFromDouble(curMillis / 1000D);
+
+        ScaledResolution scaled = new ScaledResolution(mc);
+
+        GlStateManager.pushMatrix();
+        GlStateManager.scale(currentScale, currentScale, currentScale);
+        int scaledX = (int) (scaled.getScaledWidth() * (currentWidth / 100D)  / currentScale);
+        int scaledY = (int) (scaled.getScaledHeight() * (currentHeight / 100D)  / currentScale);
+        drawHVCenteredString(currentPrefix + render, scaledX, scaledY);
+        GlStateManager.popMatrix();
+    }
+
+    private static String getStringFromDouble(double seconds) {
+        String render;
+
+        if (seconds > 100) {
+            render = String.valueOf((int) seconds);
+        } else {
+            render = String.format(Locale.US, "%.3f", seconds).substring(0, currentPrecision);
+            if(render.charAt(render.length() - 1) == '.')
+                render = render.substring(0, currentPrecision -1);
+        }
+
+        return render + "s";
+    }
+
+    public static void drawHVCenteredString(String text, int x, int y) {
+        text = text.replaceAll("§", "" + ((char) 167));
+        fr.drawString(text, x - (fr.getStringWidth(text) >> 1), y - (fr.FONT_HEIGHT >> 1), 0xFFFFFFFF, true);
+    }
+}
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