- moved some graphical classes out of Tool Shell to GUIElements.py where they belong

- when selecting an object on canvas by single click, it's name is displayed in status bar. When nothing is selected a blank message (nothing) it's displayed
- in Move Tool I've added the type of object that was moved in the status bar message
- color coded the status bar bullet to blue for selection
- the name of the selected objects are displayed in the status bar color coded: green for Gerber objects, Brown for Excellon, Red for Geometry and Blue for CNCJobs.

GUIElements.py

@@ -1,14 +1,18 @@
 from PyQt5 import QtGui, QtCore, QtWidgets
-from PyQt5.QtCore import pyqtSignal, pyqtSlot
+from PyQt5.QtCore import Qt, pyqtSignal, pyqtSlot
+from PyQt5.QtWidgets import QTextEdit, QCompleter, QAction
+from PyQt5.QtGui import QColor, QKeySequence, QPalette, QTextCursor
 
 from copy import copy
 import re
 import logging
+import html
 
 log = logging.getLogger('base')
 
 EDIT_SIZE_HINT = 70
 
+
 class RadioSet(QtWidgets.QWidget):
     activated_custom = QtCore.pyqtSignal()
 
@@ -1218,3 +1222,158 @@ class Dialog_box(QtWidgets.QWidget):
 
         self.location, self.ok = dialog_box.getText(self, title, label)
 
+
+class _BrowserTextEdit(QTextEdit):
+
+    def __init__(self, version):
+        QTextEdit.__init__(self)
+        self.menu = None
+        self.version = version
+
+    def contextMenuEvent(self, event):
+        self.menu = self.createStandardContextMenu(event.pos())
+        clear_action = QAction("Clear", self)
+        clear_action.setShortcut(QKeySequence(Qt.Key_Delete))   # it's not working, the shortcut
+        self.menu.addAction(clear_action)
+        clear_action.triggered.connect(self.clear)
+        self.menu.exec_(event.globalPos())
+
+
+    def clear(self):
+        QTextEdit.clear(self)
+        text = "FlatCAM %s (c)2014-2019 Juan Pablo Caram (Type help to get started)\n\n" % self.version
+        text = html.escape(text)
+        text = text.replace('\n', '<br/>')
+        self.moveCursor(QTextCursor.End)
+        self.insertHtml(text)
+
+
+class _ExpandableTextEdit(QTextEdit):
+    """
+    Class implements edit line, which expands themselves automatically
+    """
+
+    historyNext = pyqtSignal()
+    historyPrev = pyqtSignal()
+
+    def __init__(self, termwidget, *args):
+        QTextEdit.__init__(self, *args)
+        self.setStyleSheet("font: 9pt \"Courier\";")
+        self._fittedHeight = 1
+        self.textChanged.connect(self._fit_to_document)
+        self._fit_to_document()
+        self._termWidget = termwidget
+
+        self.completer = MyCompleter()
+
+        self.model = QtCore.QStringListModel()
+        self.completer.setModel(self.model)
+        self.set_model_data(keyword_list=[])
+        self.completer.insertText.connect(self.insertCompletion)
+
+    def set_model_data(self, keyword_list):
+        self.model.setStringList(keyword_list)
+
+    def insertCompletion(self, completion):
+        tc = self.textCursor()
+        extra = (len(completion) - len(self.completer.completionPrefix()))
+        tc.movePosition(QTextCursor.Left)
+        tc.movePosition(QTextCursor.EndOfWord)
+        tc.insertText(completion[-extra:])
+        self.setTextCursor(tc)
+        self.completer.popup().hide()
+
+    def focusInEvent(self, event):
+        if self.completer:
+            self.completer.setWidget(self)
+        QTextEdit.focusInEvent(self, event)
+
+    def keyPressEvent(self, event):
+        """
+        Catch keyboard events. Process Enter, Up, Down
+        """
+        if event.matches(QKeySequence.InsertParagraphSeparator):
+            text = self.toPlainText()
+            if self._termWidget.is_command_complete(text):
+                self._termWidget.exec_current_command()
+                return
+        elif event.matches(QKeySequence.MoveToNextLine):
+            text = self.toPlainText()
+            cursor_pos = self.textCursor().position()
+            textBeforeEnd = text[cursor_pos:]
+
+            if len(textBeforeEnd.split('\n')) <= 1:
+                self.historyNext.emit()
+                return
+        elif event.matches(QKeySequence.MoveToPreviousLine):
+            text = self.toPlainText()
+            cursor_pos = self.textCursor().position()
+            text_before_start = text[:cursor_pos]
+            # lineCount = len(textBeforeStart.splitlines())
+            line_count = len(text_before_start.split('\n'))
+            if len(text_before_start) > 0 and \
+                    (text_before_start[-1] == '\n' or text_before_start[-1] == '\r'):
+                line_count += 1
+            if line_count <= 1:
+                self.historyPrev.emit()
+                return
+        elif event.matches(QKeySequence.MoveToNextPage) or \
+                event.matches(QKeySequence.MoveToPreviousPage):
+            return self._termWidget.browser().keyPressEvent(event)
+
+        tc = self.textCursor()
+        if event.key() == Qt.Key_Tab and self.completer.popup().isVisible():
+            self.completer.insertText.emit(self.completer.getSelected())
+            self.completer.setCompletionMode(QCompleter.PopupCompletion)
+            return
+
+        QTextEdit.keyPressEvent(self, event)
+        tc.select(QTextCursor.WordUnderCursor)
+        cr = self.cursorRect()
+
+        if len(tc.selectedText()) > 0:
+            self.completer.setCompletionPrefix(tc.selectedText())
+            popup = self.completer.popup()
+            popup.setCurrentIndex(self.completer.completionModel().index(0, 0))
+
+            cr.setWidth(self.completer.popup().sizeHintForColumn(0)
+                        + self.completer.popup().verticalScrollBar().sizeHint().width())
+            self.completer.complete(cr)
+        else:
+            self.completer.popup().hide()
+
+    def sizeHint(self):
+        """
+        QWidget sizeHint impelemtation
+        """
+        hint = QTextEdit.sizeHint(self)
+        hint.setHeight(self._fittedHeight)
+        return hint
+
+    def _fit_to_document(self):
+        """
+        Update widget height to fit all text
+        """
+        documentsize = self.document().size().toSize()
+        self._fittedHeight = documentsize.height() + (self.height() - self.viewport().height())
+        self.setMaximumHeight(self._fittedHeight)
+        self.updateGeometry()
+
+    def insertFromMimeData(self, mime_data):
+        # Paste only plain text.
+        self.insertPlainText(mime_data.text())
+
+
+class MyCompleter(QCompleter):
+    insertText = pyqtSignal(str)
+
+    def __init__(self, parent=None):
+        QCompleter.__init__(self)
+        self.setCompletionMode(QCompleter.PopupCompletion)
+        self.highlighted.connect(self.setHighlighted)
+
+    def setHighlighted(self, text):
+        self.lastSelected = text
+
+    def getSelected(self):
+        return self.lastSelected