From 9c208a008d4f336f1bdc095af0a50754311092d1 Mon Sep 17 00:00:00 2001
From: Sola <42537573+solawc@users.noreply.github.com>
Date: Thu, 23 Sep 2021 15:53:48 +0800
Subject: [PATCH] =?UTF-8?q?=E2=9A=A1=EF=B8=8F=20Improve=20LVGL=20touch=20d?=
 =?UTF-8?q?river=20(#22817)?=
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---
 .../extui/mks_ui/tft_lvgl_configuration.cpp   | 46 ++++++++-----------
 buildroot/tests/mks_robin_maple               |  1 +
 2 files changed, 19 insertions(+), 28 deletions(-)

diff --git a/Marlin/src/lcd/extui/mks_ui/tft_lvgl_configuration.cpp b/Marlin/src/lcd/extui/mks_ui/tft_lvgl_configuration.cpp
index 9a742e1f3b..837d7470d6 100644
--- a/Marlin/src/lcd/extui/mks_ui/tft_lvgl_configuration.cpp
+++ b/Marlin/src/lcd/extui/mks_ui/tft_lvgl_configuration.cpp
@@ -264,9 +264,7 @@ unsigned int getTickDiff(unsigned int curTick, unsigned int lastTick) {
 }
 
 static bool get_point(int16_t *x, int16_t *y) {
-  bool is_touched = touch.getRawPoint(x, y);
-
-  if (!is_touched) return false;
+  if (!touch.getRawPoint(x, y)) return false;
 
   #if ENABLED(TOUCH_SCREEN_CALIBRATION)
     const calibrationState state = touch_calibration.get_calibration_state();
@@ -286,34 +284,26 @@ static bool get_point(int16_t *x, int16_t *y) {
 
 bool my_touchpad_read(lv_indev_drv_t * indev_driver, lv_indev_data_t * data) {
   static int16_t last_x = 0, last_y = 0;
-  static uint8_t last_touch_state = LV_INDEV_STATE_REL;
-  static int32_t touch_time1 = 0;
-  uint32_t tmpTime, diffTime = 0;
-
-  tmpTime = millis();
-  diffTime = getTickDiff(tmpTime, touch_time1);
-  if (diffTime > 20) {
-    if (get_point(&last_x, &last_y)) {
-
-      if (last_touch_state == LV_INDEV_STATE_PR) return false;
-      data->state = LV_INDEV_STATE_PR;
-
-      // Set the coordinates (if released use the last-pressed coordinates)
+  if (get_point(&last_x, &last_y)) {
+    #if TFT_ROTATION == TFT_ROTATE_180
+      data->point.x = TFT_WIDTH - last_x;
+      data->point.y = TFT_HEIGHT - last_y;
+    #else
       data->point.x = last_x;
       data->point.y = last_y;
-
-      last_x = last_y = 0;
-      last_touch_state = LV_INDEV_STATE_PR;
-    }
-    else {
-      if (last_touch_state == LV_INDEV_STATE_PR)
-        data->state = LV_INDEV_STATE_REL;
-      last_touch_state = LV_INDEV_STATE_REL;
-    }
-
-    touch_time1 = tmpTime;
+    #endif
+    data->state = LV_INDEV_STATE_PR;
+  }
+  else {
+    #if TFT_ROTATION == TFT_ROTATE_180
+      data->point.x = TFT_WIDTH - last_x;
+      data->point.y = TFT_HEIGHT - last_y;
+    #else
+      data->point.x = last_x;
+      data->point.y = last_y;
+    #endif
+    data->state = LV_INDEV_STATE_REL;
   }
-
   return false; // Return `false` since no data is buffering or left to read
 }
 
diff --git a/buildroot/tests/mks_robin_maple b/buildroot/tests/mks_robin_maple
index fcb5118307..ab4e6d7118 100755
--- a/buildroot/tests/mks_robin_maple
+++ b/buildroot/tests/mks_robin_maple
@@ -16,6 +16,7 @@ exec_test $1 $2 "MKS Robin config (FSMC Color UI)" "$3"
 use_example_configs Mks/Robin
 opt_disable TFT_CLASSIC_UI TFT_COLOR_UI TOUCH_SCREEN TFT_RES_320x240
 opt_enable TFT_LVGL_UI TFT_RES_480x320
+opt_set TFT_ROTATION TFT_ROTATE_180
 exec_test $1 $2 "MKS Robin nano v1.2 LVGL FSMC" "$3"
 
 # cleanup