1 files changed, 92 insertions, 0 deletions
diff --git a/Marlin/src/lcd/touch/touch_buttons.cpp b/Marlin/src/lcd/touch/touch_buttons.cpp
new file mode 100644
index 0000000..975de58
--- /dev/null
+++ b/Marlin/src/lcd/touch/touch_buttons.cpp
@@ -0,0 +1,92 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "../../inc/MarlinConfig.h"
+
+#if HAS_TOUCH_BUTTONS
+
+#include "touch_buttons.h"
+#include "../scaled_tft.h"
+
+#include HAL_PATH(../../HAL, tft/xpt2046.h)
+XPT2046 touchIO;
+
+#if ENABLED(TOUCH_SCREEN_CALIBRATION)
+  #include "../tft_io/touch_calibration.h"
+#endif
+
+#include "../buttons.h" // For EN_C bit mask
+#include "../marlinui.h" // For ui.refresh
+#include "../tft_io/tft_io.h"
+
+#define DOGM_AREA_LEFT   TFT_PIXEL_OFFSET_X
+#define DOGM_AREA_TOP    TFT_PIXEL_OFFSET_Y
+#define DOGM_AREA_WIDTH  (GRAPHICAL_TFT_UPSCALE) * (LCD_PIXEL_WIDTH)
+#define DOGM_AREA_HEIGHT (GRAPHICAL_TFT_UPSCALE) * (LCD_PIXEL_HEIGHT)
+
+#define BUTTON_AREA_TOP BUTTON_Y_LO
+#define BUTTON_AREA_BOT BUTTON_Y_HI
+
+TouchButtons touch;
+
+void TouchButtons::init() { touchIO.Init(); }
+
+uint8_t TouchButtons::read_buttons() {
+  #ifdef HAS_WIRED_LCD
+    int16_t x, y;
+
+    const bool is_touched = (TERN(TOUCH_SCREEN_CALIBRATION, touch_calibration.calibration.orientation, TOUCH_ORIENTATION) == TOUCH_PORTRAIT ? touchIO.getRawPoint(&y, &x) : touchIO.getRawPoint(&x, &y));
+    if (!is_touched) return 0;
+
+    #if ENABLED(TOUCH_SCREEN_CALIBRATION)
+      const calibrationState state = touch_calibration.get_calibration_state();
+      if (state >= CALIBRATION_TOP_LEFT && state <= CALIBRATION_BOTTOM_RIGHT) {
+        if (touch_calibration.handleTouch(x, y)) ui.refresh();
+        return 0;
+      }
+      x = int16_t((int32_t(x) * touch_calibration.calibration.x) >> 16) + touch_calibration.calibration.offset_x;
+      y = int16_t((int32_t(y) * touch_calibration.calibration.y) >> 16) + touch_calibration.calibration.offset_y;
+    #else
+      x = uint16_t((uint32_t(x) * TOUCH_CALIBRATION_X) >> 16) + TOUCH_OFFSET_X;
+      y = uint16_t((uint32_t(y) * TOUCH_CALIBRATION_Y) >> 16) + TOUCH_OFFSET_Y;
+    #endif
+
+    // Touch within the button area simulates an encoder button
+    if (y > BUTTON_AREA_TOP && y < BUTTON_AREA_BOT)
+      return WITHIN(x, BUTTOND_X_LO, BUTTOND_X_HI) ? EN_D
+           : WITHIN(x, BUTTONA_X_LO, BUTTONA_X_HI) ? EN_A
+           : WITHIN(x, BUTTONB_X_LO, BUTTONB_X_HI) ? EN_B
+           : WITHIN(x, BUTTONC_X_LO, BUTTONC_X_HI) ? EN_C
+           : 0;
+
+    if ( !WITHIN(x, DOGM_AREA_LEFT, DOGM_AREA_LEFT + DOGM_AREA_WIDTH)
+      || !WITHIN(y, DOGM_AREA_TOP,  DOGM_AREA_TOP  + DOGM_AREA_HEIGHT)
+    ) return 0;
+
+    // Column and row above BUTTON_AREA_TOP
+    int8_t col = (x - (DOGM_AREA_LEFT)) * (LCD_WIDTH)  / (DOGM_AREA_WIDTH),
+           row = (y - (DOGM_AREA_TOP))  * (LCD_HEIGHT) / (DOGM_AREA_HEIGHT);
+
+    // Send the touch to the UI (which will simulate the encoder wheel)
+    MarlinUI::screen_click(row, col, x, y);
+  #endif
+  return 0;
+}
+
+#endif // HAS_TOUCH_BUTTONS