z_tilt: expose an 'applied' status to allow macros to skip QGL/Z_TILT_ADJUST (#4313)

This is useful for macros that'd like to skip QGL if already leveled,
e.g.:

```
    {% if not printer.quad_gantry_level.applied %}
        QUAD_GANTRY_LEVEL
    {% endif %}
```

Signed-off-by: Michael Rose <elementation@gmail.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/klippy/extras/quad_gantry_level.py b/klippy/extras/quad_gantry_level.py
index 43173e15..8b10918f 100644
--- a/klippy/extras/quad_gantry_level.py
+++ b/klippy/extras/quad_gantry_level.py
@@ -33,6 +33,7 @@ class QuadGantryLevel:
         if len(self.probe_helper.probe_points) != 4:
             raise config.error(
                 "Need exactly 4 probe points for quad_gantry_level")
+        self.z_status = z_tilt.ZAdjustStatus(self.printer)
         self.z_helper = z_tilt.ZAdjustHelper(config, 4)
         gantry_corners = config.get('gantry_corners').split('\n')
         try:
@@ -54,6 +55,7 @@ class QuadGantryLevel:
     cmd_QUAD_GANTRY_LEVEL_help = (
         "Conform a moving, twistable gantry to the shape of a stationary bed")
     def cmd_QUAD_GANTRY_LEVEL(self, gcmd):
+        self.z_status.reset()
         self.retry_helper.start(gcmd)
         self.probe_helper.start_probe(gcmd)
     def probe_finalize(self, offsets, positions):
@@ -114,7 +116,9 @@ class QuadGantryLevel:
 
         speed = self.probe_helper.get_lift_speed()
         self.z_helper.adjust_steppers(z_adjust, speed)
-        return self.retry_helper.check_retry(z_positions)
+        return self.z_status.check_retry_result(
+            self.retry_helper.check_retry(z_positions))
+
     def linefit(self,p1,p2):
         if p1[1] == p2[1]:
             # Straight line
@@ -124,6 +128,8 @@ class QuadGantryLevel:
         return m,b
     def plot(self,f,x):
         return f[0]*x + f[1]
+    def get_status(self, eventtime):
+        return self.z_status.get_status(eventtime)
 
 def load_config(config):
     return QuadGantryLevel(config)