- remade the functions into a Tool framework

- renamed the other current files that holds 'Tools' to start with Tool
like Tcl commands start with TclCommand

ToolMeasurement.py

@@ -0,0 +1,74 @@
+from PyQt4 import QtGui
+from FlatCAMTool import FlatCAMTool
+from copy import copy
+from math import sqrt
+
+
+class Measurement(FlatCAMTool):
+
+    toolName = "Measurement Tool"
+
+    def __init__(self, app):
+        FlatCAMTool.__init__(self, app)
+
+        # self.setContentsMargins(0, 0, 0, 0)
+        self.layout.setMargin(0)
+        self.layout.setContentsMargins(0, 0, 3, 0)
+
+        self.setSizePolicy(QtGui.QSizePolicy.Ignored, QtGui.QSizePolicy.Maximum)
+
+        self.point1 = None
+        self.point2 = None
+        self.label = QtGui.QLabel("Click on a reference point ...")
+        self.label.setFrameStyle(QtGui.QFrame.StyledPanel | QtGui.QFrame.Plain)
+        self.label.setMargin(3)
+        self.layout.addWidget(self.label)
+        # self.layout.setMargin(0)
+        self.setVisible(False)
+
+        self.click_subscription = None
+        self.move_subscription = None
+
+    def install(self, icon=None, separator=None, **kwargs):
+        FlatCAMTool.install(self, icon, separator, **kwargs)
+        self.app.ui.right_layout.addWidget(self)
+        self.app.plotcanvas.mpl_connect('key_press_event', self.on_key_press)
+
+    def run(self):
+        self.toggle()
+
+    def on_click(self, event):
+        if self.point1 is None:
+            self.point1 = (event.xdata, event.ydata)
+        else:
+            self.point2 = copy(self.point1)
+            self.point1 = (event.xdata, event.ydata)
+        self.on_move(event)
+
+    def on_key_press(self, event):
+        if event.key == 'r':
+            self.toggle()
+
+    def toggle(self):
+        if self.isVisible():
+            self.setVisible(False)
+            self.app.plotcanvas.mpl_disconnect(self.move_subscription)
+            self.app.plotcanvas.mpl_disconnect(self.click_subscription)
+        else:
+            self.setVisible(True)
+            self.move_subscription = self.app.plotcanvas.mpl_connect('motion_notify_event', self.on_move)
+            self.click_subscription = self.app.plotcanvas.mpl_connect('button_press_event', self.on_click)
+
+    def on_move(self, event):
+        if self.point1 is None:
+            self.label.setText("Click on a reference point...")
+        else:
+            try:
+                dx = event.xdata - self.point1[0]
+                dy = event.ydata - self.point1[1]
+                d = sqrt(dx**2 + dy**2)
+                self.label.setText("D = %.4f  D(x) = %.4f  D(y) = %.4f" % (d, dx, dy))
+            except TypeError:
+                pass
+        if self.update is not None:
+            self.update()