beremiz

Fix 'DoGetTextExtent - invalid DC' error

2018-06-26, Andrey Skvortsov
3c94bac4526e
Fix 'DoGetTextExtent - invalid DC' error

most likely this error happens only on certain wx backends.
GTK3+ on GNU/Linux is apparently one of them.
The problem is described in wxWidgets issue tracker.
http://trac.wxwidgets.org/ticket/12486

[-------------------------------------------------------------------------------------------------------------------]
platform:
Linux-4.16.0-2-rt-amd64-x86_64-with-debian-buster-sid

python-version:
2.7.15

traceback:
File "/home/developer/WorkData/PLC/beremiz/beremiz/ProjectController.py", line 1605, in DispatchDebugValuesProc
self.CallWeakcallables("__tick__", "NewDataAvailable", debug_ticks)
File "/home/developer/WorkData/PLC/beremiz/beremiz/ProjectController.py", line 1585, in CallWeakcallables
function(*cargs)
File "/home/developer/WorkData/PLC/beremiz/beremiz/editors/Viewer.py", line 1217, in NewDataAvailable
refresh_rect.Union(element.GetRedrawRect())
File "/home/developer/WorkData/PLC/beremiz/beremiz/graphics/GraphicCommons.py", line 1609, in GetRedrawRect
self.ValueSize = self.Parent.GetMiniTextExtent(self.ComputedValue)
File "/home/developer/WorkData/PLC/beremiz/beremiz/editors/Viewer.py", line 932, in GetMiniTextExtent
return self.MiniTextDC.GetTextExtent(text)
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk3/wx/_gdi.py", line 4127, in GetTextExtent
return _gdi_.DC_GetTextExtent(*args, **kwargs)
: C++ assertion "m_graphicContext" failed at ../src/common/dcgraph.cpp(1160) in DoGetTextExtent(): wxGCDC(cg)::DoGetTextExtent - invalid DC

wx-platform:
__WXGTK__

wx-version:
3.0.2.0

[-------------------------------------------------------------------------------------------------------------------]

traceback:
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/LogViewer.py", line 740, in OnMessageToolTipTimer
self.MessageToolTip.SetFont(self.Font)
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/CustomToolTip.py", line 75, in SetFont
self.RefreshTip()
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/CustomToolTip.py", line 158, in RefreshTip
self.SetClientSize(self.GetToolTipSize())
File "/home/developer/WorkData/PLC/beremiz/beremiz/controls/CustomToolTip.py", line 145, in GetToolTipSize
w, h = dc.GetTextExtent(line)
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk3/wx/_gdi.py", line 4127, in GetTextExtent
return _gdi_.DC_GetTextExtent(*args, **kwargs)
: C++ assertion "m_graphicContext" failed at ../src/common/dcgraph.cpp(1160) in DoGetTextExtent(): wxGCDC(cg)::DoGetTextExtent - invalid DC

[-------------------------------------------------------------------------------------------------------------------]
/**************************************************************************
*
* Copyright (C) 2006 Steve Karg <skarg@users.sourceforge.net>
* Copyright (C) 2011 Krzysztof Malorny <malornykrzysztof@gmail.com>
* Copyright (C) 2017 Mario de Sousa <msousa@fe.up.pt>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*********************************************************************/
#ifndef AV_H
#define AV_H
#include <stdbool.h>
#include <stdint.h>
#include "bacdef.h"
#include "bacerror.h"
#include "wp.h"
#include "rp.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct analog_value_descr {
/* pointer to IEC 61131-3 located variable that is mapped onto this BACnet object */
float *Located_Var_ptr;
uint32_t Object_Identifier; /* called object 'Instance' in the source code! */
char *Object_Name;
char *Description;
uint16_t Units;
/* stores the current value */
/* one entry per priority value */
float Present_Value[BACNET_MAX_PRIORITY];
unsigned Event_State:3;
bool Out_Of_Service;
} ANALOG_VALUE_DESCR;
void Analog_Value_Property_Lists(
const int **pRequired,
const int **pOptional,
const int **pProprietary);
bool Analog_Value_Valid_Instance(
uint32_t object_instance);
unsigned Analog_Value_Count(
void);
uint32_t Analog_Value_Index_To_Instance(
unsigned index);
unsigned Analog_Value_Instance_To_Index(
uint32_t object_instance);
bool Analog_Value_Object_Name(
uint32_t object_instance,
BACNET_CHARACTER_STRING * object_name);
int Analog_Value_Read_Property(
BACNET_READ_PROPERTY_DATA * rpdata);
bool Analog_Value_Write_Property(
BACNET_WRITE_PROPERTY_DATA * wp_data);
bool Analog_Value_Present_Value_Set(
uint32_t object_instance,
float value,
uint8_t priority);
float Analog_Value_Present_Value(
uint32_t object_instance);
char *Analog_Value_Description(
uint32_t instance);
uint16_t Analog_Value_Units(
uint32_t instance);
bool Analog_Value_Out_Of_Service(
uint32_t instance);
void Analog_Value_Out_Of_Service_Set(
uint32_t instance,
bool oos_flag);
void Analog_Value_Init(
void);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif