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Converted Python console from C++ to Python.
This cleans python support a bit and makes a starting point for further improvements of the console. It's possible to run the console also outside QGIS: import qgis.console qgis.console.show_console() git-svn-id: http://svn.osgeo.org/qgis/trunk@12725 c8812cc2-4d05-0410-92ff-de0c093fc19c
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wonder
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Jan 10, 2010
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,180 @@ | ||
| # -*- coding: utf-8 -*- | ||
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| from PyQt4.QtCore import * | ||
| from PyQt4.QtGui import * | ||
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| import traceback | ||
| import sys | ||
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| from ui_qgspythondialog import Ui_QgsPythonDialog | ||
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| _console = None | ||
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| def show_console(): | ||
| """ called from QGIS to open the console """ | ||
| global _console | ||
| if _console is None: | ||
| _console = QgsPythonConsole() | ||
| _console.show() | ||
| _console.raise_() | ||
| _console.setWindowState( _console.windowState() & ~Qt.WindowMinimized ) | ||
| _console.activateWindow() | ||
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| _old_stdout = sys.stdout | ||
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| class QgisOutputCatcher: | ||
| def __init__(self): | ||
| self.data = '' | ||
| def write(self, stuff): | ||
| self.data += stuff | ||
| def get_and_clean_data(self): | ||
| tmp = self.data | ||
| self.data = '' | ||
| return tmp | ||
| def flush(self): | ||
| pass | ||
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| def installConsoleHook(): | ||
| sys.stdout = QgisOutputCatcher() | ||
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| def uninstallConsoleHook(): | ||
| sys.stdout = _old_stdout | ||
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| class ConsoleHistory(object): | ||
| def __init__(self): | ||
| self.cmds = [] | ||
| self.pos = 0 | ||
| self.active_cmd = u"" # active, not yet entered command | ||
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| def add_cmd(self, command): | ||
| if len(command) != 0: | ||
| self.cmds.append(command) | ||
| self.pos = len(self.cmds) | ||
| self.active_cmd = u"" | ||
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| def get_previous_cmd(self, current): | ||
| if self.pos == 0: | ||
| return None | ||
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| if self.pos == len(self.cmds): | ||
| self.active_cmd = current | ||
| else: | ||
| self.cmds[self.pos] = current | ||
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| self.pos -= 1 | ||
| return self.cmds[self.pos] | ||
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| def get_next_cmd(self, current): | ||
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| # if we're at active (last) command, don't move | ||
| if self.pos == len(self.cmds): | ||
| return None | ||
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| self.cmds[self.pos] = current | ||
| self.pos += 1 | ||
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| if self.pos == len(self.cmds): | ||
| return self.active_cmd | ||
| else: | ||
| return self.cmds[self.pos] | ||
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| class QgsPythonConsole(QWidget, Ui_QgsPythonDialog): | ||
| def __init__(self, parent=None): | ||
| QWidget.__init__(self, parent) | ||
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| self.setupUi(self) | ||
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| # minimize button was not enabled on mac | ||
| self.setWindowFlags( self.windowFlags() | Qt.WindowMinimizeButtonHint ) | ||
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| self.history = ConsoleHistory() | ||
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| self.console_globals = {} | ||
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| def escapeHtml(self, text): | ||
| return text.replace("<", "<").replace(">", ">") | ||
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| @pyqtSlot() | ||
| def on_pbnPrev_clicked(self): | ||
| cmd = self.history.get_previous_cmd( self.getCommand() ) | ||
| if cmd is not None: | ||
| self.edtCmdLine.setText(cmd) | ||
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| @pyqtSlot() | ||
| def on_pbnNext_clicked(self): | ||
| cmd = self.history.get_next_cmd( self.getCommand() ) | ||
| if cmd is not None: | ||
| self.edtCmdLine.setText(cmd) | ||
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| def getCommand(self): | ||
| return unicode(self.edtCmdLine.toPlainText()) | ||
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| def execute(self, single): | ||
| command = self.getCommand() | ||
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| self.history.add_cmd(command) | ||
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| try: | ||
| # run command | ||
| code = compile(command, '<console>', 'single' if single else 'exec') | ||
| res = eval(code, self.console_globals) | ||
| result = unicode( res ) if res is not None else u'' | ||
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| # get standard output | ||
| output = sys.stdout.get_and_clean_data() | ||
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| #_old_stdout.write("cmd: '"+command+"'\n") | ||
| #_old_stdout.write("res: '"+result+"'\n") | ||
| #_old_stdout.write("out: '"+output+"'\n") | ||
| #_old_stdout.flush() | ||
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| # escape the result so python objects display properly and | ||
| # we can still use html output to get nicely formatted display | ||
| output = self.escapeHtml( output ) + self.escapeHtml( result ) | ||
| if len(output) != 0: | ||
| output += "<br>" | ||
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| except Exception, e: | ||
| #lst = traceback.format_exception(sys.exc_type, sys.exc_value, sys.exc_traceback) | ||
| lst = traceback.format_exception_only(sys.exc_type, sys.exc_value) | ||
| errorText = "<br>".join(map(self.escapeHtml, lst)) | ||
| output = "<font color=\"red\">" + errorText + "</font><br>" | ||
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| s = "<b><font color=\"green\">>>></font> " + self.escapeHtml( command ) + "</b><br>" + output | ||
| self.edtCmdLine.setText("") | ||
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| self.txtHistory.moveCursor(QTextCursor.End) | ||
| self.txtHistory.insertHtml(s) | ||
| self.txtHistory.moveCursor(QTextCursor.End) | ||
| self.txtHistory.ensureCursorVisible() | ||
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| @pyqtSlot() | ||
| def on_pbnExecute_clicked(self): | ||
| self.execute(False) | ||
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| @pyqtSlot() | ||
| def on_pbnEval_clicked(self): | ||
| self.execute(True) | ||
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| def showEvent(self, event): | ||
| QWidget.showEvent(self, event) | ||
| installConsoleHook() | ||
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| def closeEvent(self, event): | ||
| uninstallConsoleHook() | ||
| QWidget.closeEvent(self, event) | ||
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| if __name__ == '__main__': | ||
| import sys | ||
| a = QApplication(sys.argv) | ||
| w = QgsPythonConsole() | ||
| w.show() | ||
| a.exec_() |
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