From b7fb1aac27f441be5947bb8b2157b63fe055db29 Mon Sep 17 00:00:00 2001
From: jh777916 <juba.hamma@cea.fr>
Date: Wed, 25 Oct 2023 15:07:02 +0200
Subject: [PATCH] new feature : QStatusBar added to the PlotWidget.ui,
 containing the hovered X,Y coordinates in the canvas

---
 tools/CurvePlot/src/python/ui/PlotWidget.py |  1 +
 tools/CurvePlot/src/python/ui/PlotWidget.ui |  6 ++++++
 tools/CurvePlot/src/python/views/XYView.py  | 17 +++++++++++++++++
 3 files changed, 24 insertions(+)

diff --git a/tools/CurvePlot/src/python/ui/PlotWidget.py b/tools/CurvePlot/src/python/ui/PlotWidget.py
index 2e3eea5f1..fd5c29fe9 100644
--- a/tools/CurvePlot/src/python/ui/PlotWidget.py
+++ b/tools/CurvePlot/src/python/ui/PlotWidget.py
@@ -32,4 +32,5 @@ class PlotWidget(QtWidgets.QMainWindow):
     So clean up manually. 
     """
     self.toolBar = None
+    self.statusBar = None
     self.setCentralWidget(None)
diff --git a/tools/CurvePlot/src/python/ui/PlotWidget.ui b/tools/CurvePlot/src/python/ui/PlotWidget.ui
index d4bbfe16c..2a60ed391 100644
--- a/tools/CurvePlot/src/python/ui/PlotWidget.ui
+++ b/tools/CurvePlot/src/python/ui/PlotWidget.ui
@@ -25,6 +25,12 @@
     <bool>false</bool>
    </attribute>
   </widget>
+  <widget class="QStatusBar" name="statusBar">
+   <property name="windowTitle">
+    <string>statusBar</string>
+   </property>
+  </widget>
+
  </widget>
  <resources/>
  <connections/>
diff --git a/tools/CurvePlot/src/python/views/XYView.py b/tools/CurvePlot/src/python/views/XYView.py
index 6b0bdedf2..bb8083192 100644
--- a/tools/CurvePlot/src/python/views/XYView.py
+++ b/tools/CurvePlot/src/python/views/XYView.py
@@ -86,6 +86,7 @@ class XYView(View):
     self._plotWidget = None
     self._sgPyQt = self._controller._sgPyQt
     self._toolbar = None
+    self._statusbar = None
     self._mplNavigationActions = {}
     self._toobarMPL = None
     self._grid = None
@@ -189,6 +190,19 @@ class XYView(View):
       self._lastMarkerID = -1      
       self.update()
 
+  def onMove(self,event):
+    """ get the x and y pixel coords """
+
+    fmtXcoord = ".4f"
+    fmtYcoord = ".4f"
+
+    if self._axisXSciNotation : fmtXcoord = ".4e"
+    if self._axisYSciNotation : fmtYcoord = ".4e"
+
+    if event.inaxes:
+        self._statusbar.showMessage(
+          f"x, y = {event.xdata:{fmtXcoord}}, {event.ydata:{fmtYcoord}}")
+
   def onPick(self, event):
     """ MPL callback when picking
     """
@@ -271,6 +285,7 @@ class XYView(View):
       self._mplNavigationActions[actionName] = act
     self._plotWidget.setCentralWidget(self._mplCanvas)
     self._toolbar = self._plotWidget.toolBar
+    self._statusbar = self._plotWidget.statusBar
     self.populateToolbar()
 
     self._popupMenu = QtWidgets.QMenu()
@@ -287,6 +302,8 @@ class XYView(View):
     self._mplCanvas.customContextMenuRequested.connect(self.onContextMenu)
     self._mplCanvas.mpl_connect('scroll_event', self.onScroll)
     self._mplCanvas.mpl_connect('button_press_event', self.onMousePress)
+    self._mplCanvas.mpl_connect('motion_notify_event', self.onMove)
+
 
   def populateToolbar(self):
     # Action to dump view in a file
-- 
2.39.2