Add screenmode and scrollgroup examples.

Co-authored-by: Phil Howard <[email protected]>

examples/screenmodes.py

@@ -0,0 +1,177 @@
+import gc
+import time
+import machine
+from picographics import PicoGraphics, PEN_RGB555, WIDESCREEN
+
+DISPLAY_WIDTH = 320
+DISPLAY_HEIGHT = 240
+
+FRAME_WIDTH=1280
+FRAME_HEIGHT=720
+
+# number of modes listed in array
+numModes = 16
+# current mode being dispalyed 
+currentMode = 0
+# mode which will be selected with the Y button
+modeSelect = 0
+modes = [
+   (320,240,0),
+   (360,240,0),
+   (360,288,0),
+   (400,225,1),
+   (400,240,1),
+   (400,300,1),
+   (480,270,1),
+   (960,270,1),
+   (640,480,0),
+   (720,480,0),
+   (720,576,0),
+   (800,450,1),
+   (800,480,1),
+   (800,600,1),
+   (960,540,1),
+   (1280,720,1)
+]
+
+display = PicoGraphics(PEN_RGB555, DISPLAY_WIDTH, DISPLAY_HEIGHT, FRAME_WIDTH, FRAME_HEIGHT)
+
+modeChange = 0
+button_y = machine.Pin(9, machine.Pin.IN, machine.Pin.PULL_UP)
+
+BLACK    = display.create_pen(0, 0, 0)
+WHITE    = display.create_pen(250, 250, 250)
+DARKGREY = display.create_pen(32,32,32)
+GREY     = display.create_pen(96,96,96)
+SKYBLUE  = display.create_pen(32,32,192)
+RED    = display.create_pen(192,32,32)
+GREEN    = display.create_pen(32,192,32)
+
+display.set_font("bitmap8")
+
+modechange =0
+
+while True:
+
+   for p in range (2):
+      if modeChange == 0: 
+         display.set_pen(0)
+         display.clear()
+
+      for f in range (720):
+         display.set_pen(display.create_pen(0, 0, int(f/3)))
+         display.line(0,f,FRAME_WIDTH,f)  
+
+      display.set_pen(WHITE)
+      display.text("Pimoroni Screen Mode Selector",0,0,300,1)
+
+      if modeChange ==0 or modeChange >2:
+         display.update()
+   if modeChange >4:
+      modeChange =0
+
+   elif modeChange >2:
+      modeChange -=2
+
+
+   while True:
+      if modeChange>2:
+          break
+      if display.is_button_a_pressed():
+         print("X is pressed")
+         modeSelect -=1
+         if modeSelect <0:
+            modeSelect = numModes -1
+         while display.is_button_a_pressed():
+            m=0
+      if display.is_button_x_pressed():
+         print("A is pressed")
+         modeSelect +=1
+         if modeSelect > numModes-1:
+            modeSelect = 0
+         while display.is_button_x_pressed():
+            m=0
+
+      for p in range (2):
+
+         display.set_pen(DARKGREY)
+         display.rectangle(14, 22, 137, numModes*10+14)
+         for f in range(numModes):
+            display.set_pen(GREY)
+            if  f == modeSelect:
+               display.set_pen(SKYBLUE)
+               if button_y.value() == 0:
+                  if modeSelect != currentMode:
+                     if modes[f][2] and WIDESCREEN == 0:
+                        display.set_pen(RED)
+                        modeChange = -1
+                     else:
+                        modeChange = 3
+                        display.set_pen(GREEN)
+
+            display.rectangle(20,f*10+29,125,10)
+            display.set_pen(WHITE)
+            modeText ="{width:} x {height:}".format(width=modes[f][0],height=modes[f][1])
+            display.text(modeText,30,f*10+30,300,1)
+
+            if  currentMode == f:
+               display.text(">",22,f*10+30,300,1)
+               display.text("<",137,f*10+30,300,1)
+
+         display.update()
+
+
+      if modeChange == 2:
+         for f in range(100):
+            display.set_pen(GREEN)
+            display.rectangle(20,modeSelect*10+29,125,10)
+            display.set_pen(WHITE)
+            display.text("OK - Hit Y {timeout:}".format(timeout=int((99-f)/10)),30,modeSelect*10+30,300,1)
+            display.update()
+            time.sleep(0.15)
+
+            if button_y.value() == 0:
+               break
+               modechange =0
+         if f >98:
+            #this is a workaround for screenmode change crash between 400x??? modes or @ 800x???
+            #del display
+            #gc.collect()
+            #display = PicoGraphics(PEN_RGB555,modes[0][0],modes[0][1], FRAME_WIDTH, FRAME_HEIGHT)
+
+            del display
+            gc.collect()
+            display = PicoGraphics(PEN_RGB555,modes[currentMode][0],modes[currentMode][1], FRAME_WIDTH, FRAME_HEIGHT)
+         else:
+            currentMode = modeSelect
+         modeChange=5
+
+      if modeChange ==-1:
+         display.set_pen(RED)
+         display.rectangle(20,modeSelect*10+29,125,10)
+         display.set_pen(WHITE)
+         display.text("Unsuported - Wide Only",30,modeSelect*10+30,300,1)
+         display.update()
+         modeChange =0
+         time.sleep(0.25)
+
+      if modeChange ==1:
+         display.set_pen(GREEN)
+         display.rectangle(20,modeSelect*10+29,125,10)
+         display.set_pen(WHITE)
+         display.text("Mode Change",30,modeSelect*10+30,300,1)
+         display.update()
+         time.sleep(0.9)
+
+         #this is a workaround for screenmode change crash between 400x??? modes or @ 800x???
+         #del display
+         #gc.collect()
+         #display = PicoGraphics(PEN_RGB555,modes[0][0],modes[0][1], FRAME_WIDTH, FRAME_HEIGHT)
+
+         del display
+         gc.collect()
+         display = PicoGraphics(PEN_RGB555,modes[modeSelect][0],modes[modeSelect][1], FRAME_WIDTH, FRAME_HEIGHT)
+
+         modeChange=4
+
+