Always refresh preview on showEvent and add tooltip and statustip to …

…explain clicking will force a refresh Colorbleed#33

capture_gui/app.py

@@ -42,13 +42,16 @@ def __init__(self, options_getter, validator, parent=None):
         QtWidgets.QWidget.__init__(self, parent=parent)
 
         # Add attributes
-        self.initialized = False
         self.options_getter = options_getter
         self.validator = validator
         self.preview = ClickLabel()
         self.preview.setFixedWidth(self.preview_width)
         self.preview.setFixedHeight(self.preview_height)
 
+        tip = "Click to force a refresh"
+        self.preview.setToolTip(tip)
+        self.preview.setStatusTip(tip)
+
         # region Build
         self.layout = QtWidgets.QVBoxLayout()
         self.layout.setAlignment(QtCore.Qt.AlignHCenter)
@@ -104,10 +107,7 @@ def refresh(self):
 
     def showEvent(self, event):
         """Initialize when shown"""
-        if not self.initialized:
-            self.refresh()
-
-        self.initialized = True
+        self.refresh()
         event.accept()