show aspect ratio of resolutions

diff --git a/external_screen.py b/external_screen.py
index 6d47ec725962fdc1a713a1b7f756fba9cb7ce07a..895405e20d4a2fd01217ce306f64b596809b1bc6 100755 (executable)
--- a/external_screen.py
+++ b/external_screen.py
@@ -25,10 +25,22 @@ def getXrandrInformation():
        if p.returncode != 0: raise Exception("Querying xrandr for data failed")
        return connectors
 
-def res2str(res):
+def res2xrandr(res):
        (w, h) = res
        return str(w)+'x'+str(h)
 
+def res2user(res):
+       (w, h) = res
+       # get ratio
+       ratio = int(round(16.0*h/w))
+       if ratio == 12: # 16:12 = 4:3
+               strRatio = '4:3'
+       elif ratio == 13: # 16:12.8 = 5:4
+               strRatio = '5:4'
+       else: # let's just hope this will never be 14 or more...
+               strRatio = '16:%d' % ratio
+       return '%dx%d (%s)' %(w, h, strRatio)
+
 # Check screen setup
 internalName = "LVDS"
 externalName = "CRT1"
@@ -38,11 +50,11 @@ externalResolutions = connectors.get(externalName)
 
 # Check what to do
 if externalResolutions is not None: # we need to ask what to do
-       extPosition = PositionSelection(map(res2str, internalResolutions), map(res2str, externalResolutions))
+       extPosition = PositionSelection(map(res2user, internalResolutions), map(res2user, externalResolutions))
        extPosition.exec_()
        if not extPosition.result(): sys.exit(1) # the user canceled
-       extResolution = res2str(externalResolutions[extPosition.extResolutions.currentIndex()])
-       intResolution = res2str(internalResolutions[extPosition.intResolutions.currentIndex()])
+       extResolution = res2xrandr(externalResolutions[extPosition.extResolutions.currentIndex()])
+       intResolution = res2xrandr(internalResolutions[extPosition.intResolutions.currentIndex()])
        # build command-line
        externalArgs = ["--mode", extResolution] # we definitely want an external screen
        if extPosition.extOnly.isChecked():
@@ -60,7 +72,7 @@ if externalResolutions is not None: # we need to ask what to do
                else:
                        internalArgs += ["--primary"]
 else:
-       internalArgs = ["--mode", res2str(internalResolutions[0]), "--primary"] # there must be a resolution for the internal screen
+       internalArgs = ["--mode", res2str(internalResolutions[0]), "--primary"]
        externalArgs = ["--off"]
 # and do it
 call = ["xrandr", "--output", internalName] + internalArgs + ["--output", externalName] + externalArgs