Display alerts (#4170)

* Move static functions into Screen.h, show compass during calibration

* Move to _fontHeight macro to avoid collision

* Move some alert functions to new alert handler

* Catch missed reboot code

* ESP32 fixes

* Bump esp8266-oled-ssd1306

* Fixes for when a device has no screen

* Use new startAlert(char*) helper class

* Add EINK bits back to alert handling

* Add noop class for no-display devices

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/graphics/Screen.h

@@ -21,11 +21,9 @@ class Screen
     void print(const char *) {}
     void doDeepSleep() {}
     void forceDisplay(bool forceUiUpdate = false) {}
-    void startBluetoothPinScreen(uint32_t pin) {}
-    void stopBluetoothPinScreen() {}
-    void startRebootScreen() {}
-    void startShutdownScreen() {}
     void startFirmwareUpdateScreen() {}
+    void startAlert(const char *) {}
+    void endAlert() {}
 };
 } // namespace graphics
 #else
@@ -34,6 +32,8 @@ class Screen
 #include <OLEDDisplayUi.h>
 
 #include "../configuration.h"
+#include "gps/GeoCoord.h"
+#include "graphics/ScreenFonts.h"
 
 #ifdef USE_ST7567
 #include <ST7567Wire.h>
@@ -173,15 +173,29 @@ class Screen : public concurrency::OSThread
     void showPrevFrame() { enqueueCmd(ScreenCmd{.cmd = Cmd::SHOW_PREV_FRAME}); }
     void showNextFrame() { enqueueCmd(ScreenCmd{.cmd = Cmd::SHOW_NEXT_FRAME}); }
 
-    /// Starts showing the Bluetooth PIN screen.
-    //
-    // Switches over to a static frame showing the Bluetooth pairing screen
-    // with the PIN.
-    void startBluetoothPinScreen(uint32_t pin)
+    // generic alert start
+    void startAlert(FrameCallback _alertFrame)
+    {
+        alertFrame = _alertFrame;
+        ScreenCmd cmd;
+        cmd.cmd = Cmd::START_ALERT_FRAME;
+        enqueueCmd(cmd);
+    }
+
+    void startAlert(const char *_alertMessage)
+    {
+        startAlert([_alertMessage](OLEDDisplay *display, OLEDDisplayUiState *state, int16_t x, int16_t y) -> void {
+            uint16_t x_offset = display->width() / 2;
+            display->setTextAlignment(TEXT_ALIGN_CENTER);
+            display->setFont(FONT_MEDIUM);
+            display->drawString(x_offset + x, 26 + y, _alertMessage);
+        });
+    }
+
+    void endAlert()
     {
         ScreenCmd cmd;
-        cmd.cmd = Cmd::START_BLUETOOTH_PIN_SCREEN;
-        cmd.bluetooth_pin = pin;
+        cmd.cmd = Cmd::STOP_ALERT_FRAME;
         enqueueCmd(cmd);
     }
 
@@ -192,20 +206,6 @@ class Screen : public concurrency::OSThread
         enqueueCmd(cmd);
     }
 
-    void startShutdownScreen()
-    {
-        ScreenCmd cmd;
-        cmd.cmd = Cmd::START_SHUTDOWN_SCREEN;
-        enqueueCmd(cmd);
-    }
-
-    void startRebootScreen()
-    {
-        ScreenCmd cmd;
-        cmd.cmd = Cmd::START_REBOOT_SCREEN;
-        enqueueCmd(cmd);
-    }
-
     // Function to allow the AccelerometerThread to set the heading if a sensor provides it
     // Mutex needed?
     void setHeading(long _heading)
@@ -224,9 +224,6 @@ class Screen : public concurrency::OSThread
     void setFunctionSymbal(std::string sym);
     void removeFunctionSymbal(std::string sym);
 
-    /// Stops showing the bluetooth PIN screen.
-    void stopBluetoothPinScreen() { enqueueCmd(ScreenCmd{.cmd = Cmd::STOP_BLUETOOTH_PIN_SCREEN}); }
-
     /// Stops showing the boot screen.
     void stopBootScreen() { enqueueCmd(ScreenCmd{.cmd = Cmd::STOP_BOOT_SCREEN}); }
 
@@ -362,6 +359,7 @@ class Screen : public concurrency::OSThread
     bool isAUTOOled = false;
 
   private:
+    FrameCallback alertFrames[1];
     struct ScreenCmd {
         Cmd cmd;
         union {
@@ -387,11 +385,8 @@ class Screen : public concurrency::OSThread
     void handleOnPress();
     void handleShowNextFrame();
     void handleShowPrevFrame();
-    void handleStartBluetoothPinScreen(uint32_t pin);
     void handlePrint(const char *text);
     void handleStartFirmwareUpdateScreen();
-    void handleShutdownScreen();
-    void handleRebootScreen();
     /// Rebuilds our list of frames (screens) to default ones.
     void setFrames();
 
@@ -429,6 +424,9 @@ class Screen : public concurrency::OSThread
     bool digitalWatchFace = true;
 #endif
 
+    /// callback for current alert frame
+    FrameCallback alertFrame;
+
     /// Queue of commands to execute in doTask.
     TypedQueue<ScreenCmd> cmdQueue;
     /// Whether we are using a display
@@ -455,4 +453,92 @@ class Screen : public concurrency::OSThread
 };
 
 } // namespace graphics
+namespace
+{
+/// A basic 2D point class for drawing
+class Point
+{
+  public:
+    float x, y;
+
+    Point(float _x, float _y) : x(_x), y(_y) {}
+
+    /// Apply a rotation around zero (standard rotation matrix math)
+    void rotate(float radian)
+    {
+        float cos = cosf(radian), sin = sinf(radian);
+        float rx = x * cos + y * sin, ry = -x * sin + y * cos;
+
+        x = rx;
+        y = ry;
+    }
+
+    void translate(int16_t dx, int dy)
+    {
+        x += dx;
+        y += dy;
+    }
+
+    void scale(float f)
+    {
+        // We use -f here to counter the flip that happens
+        // on the y axis when drawing and rotating on screen
+        x *= f;
+        y *= -f;
+    }
+};
+
+} // namespace
+
+static void drawLine(OLEDDisplay *d, const Point &p1, const Point &p2)
+{
+    d->drawLine(p1.x, p1.y, p2.x, p2.y);
+}
+
+static uint16_t getCompassDiam(OLEDDisplay *display)
+{
+    uint16_t diam = 0;
+    uint16_t offset = 0;
+
+    if (config.display.displaymode != meshtastic_Config_DisplayConfig_DisplayMode_DEFAULT)
+        offset = FONT_HEIGHT_SMALL;
+
+    // get the smaller of the 2 dimensions and subtract 20
+    if (display->getWidth() > (display->getHeight() - offset)) {
+        diam = display->getHeight() - offset;
+        // if 2/3 of the other size would be smaller, use that
+        if (diam > (display->getWidth() * 2 / 3)) {
+            diam = display->getWidth() * 2 / 3;
+        }
+    } else {
+        diam = display->getWidth();
+        if (diam > ((display->getHeight() - offset) * 2 / 3)) {
+            diam = (display->getHeight() - offset) * 2 / 3;
+        }
+    }
+
+    return diam - 20;
+};
+
+// Draw north
+static void drawCompassNorth(OLEDDisplay *display, int16_t compassX, int16_t compassY, float myHeading)
+{
+    // If north is supposed to be at the top of the compass we want rotation to be +0
+    if (config.display.compass_north_top)
+        myHeading = -0;
+
+    Point N1(-0.04f, 0.65f), N2(0.04f, 0.65f);
+    Point N3(-0.04f, 0.55f), N4(0.04f, 0.55f);
+    Point *rosePoints[] = {&N1, &N2, &N3, &N4};
+
+    for (int i = 0; i < 4; i++) {
+        // North on compass will be negative of heading
+        rosePoints[i]->rotate(-myHeading);
+        rosePoints[i]->scale(getCompassDiam(display));
+        rosePoints[i]->translate(compassX, compassY);
+    }
+    drawLine(display, N1, N3);
+    drawLine(display, N2, N4);
+    drawLine(display, N1, N4);
+}
 #endif