Module Gnumed.wxpython.gmImageWidgets
GNUmed image display widgets.
Classes
class cImageDisplay (parent, ID, bitmap, **kwargs)-
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class cImageDisplay(wx.lib.statbmp.GenStaticBitmap): """Control showing an image.""" def __init__(self, parent, ID, bitmap, **kwargs): self.__empty_bmp = wx.Bitmap(wx.Image(1, 1, True)) super().__init__(parent, ID, self.__empty_bmp, **kwargs) self.__init_ui() self.__filename = None self.__zoom_count = 0 self.__min_width = 25 self.__current_rotation = 0 # in degrees self.__callback_on_lclick = None self.refresh() #-------------------------------------------------------- def process_char(self, char) -> bool: """Call action based on character. Returns: True/False based on whether the character mapped to a command. """ match char: case 'r': self.__current_rotation += 90 if self.__current_rotation == 360: self.__current_rotation = 0 self.refresh() case 'l': self.__current_rotation -= 90 if self.__current_rotation == -360: self.__current_rotation = 0 self.refresh() case 'o': self.__zoom_count = 0 self.__current_rotation = 0 self.refresh() case '+': self.__zoom_count += 1 self.refresh() case '-': self.__zoom_count -= 1 self.refresh() case _: return False return True #-------------------------------------------------------- def process_keycode(self, keycode) -> bool: """Call action based on translated key code. Returns: True/False based on whether the key code mapped to a command. """ return False # match keycode: # case 317: print('scroll down') # case 315: print('scroll up') # case 314: print('scroll left') # case 316: print('scroll right') # case _: # print('bmp/unmapped keycode:', keycode) # return False # # return True #-------------------------------------------------------- # event handlers #-------------------------------------------------------- def _on_bitmap_leftclicked(self, event): event.Skip() self.SetFocus() if not self.__callback_on_lclick: return self.__callback_on_lclick() #-------------------------------------------------------- def _on_char(self, event): uk = event.UnicodeKey if uk != wx.WXK_NONE: if not self.process_char(chr(uk)): event.Skip() return kc = event.KeyCode if kc != wx.WXK_NONE: self.process_keycode(kc) if not self.process_keycode(kc): event.Skip() return event.Skip() #-------------------------------------------------------- # properties #-------------------------------------------------------- def __get_filename(self): return self.__filename def __set_filename(self, filename:str): if filename != self.__filename: self.__zoom_count = 0 self.__current_rotation = 0 self.__filename = filename self.refresh() filename = property(__get_filename, __set_filename) #-------------------------------------------------------- # internal helpers #-------------------------------------------------------- def __init_ui(self): self.Bind(wx.EVT_LEFT_UP, self._on_bitmap_leftclicked) self.Bind(wx.EVT_CHAR, self._on_char) #-------------------------------------------------------- def __adjust_bitmap(self): img_data = None bitmap = None try: img_data = wx.Image(self.__filename, wx.BITMAP_TYPE_ANY) orig_width = img_data.GetWidth() except Exception: _log.exception('cannot load image from [%s]', self.__filename) return False if self.__zoom_count != 0: zoom_step = orig_width // 10 target_width = orig_width + (zoom_step * self.__zoom_count) target_width = max(target_width, self.__min_width) try: orig_height = img_data.GetHeight() target_height = round((orig_height / orig_width) * target_width) if target_height and target_width: img_data.Rescale(target_width, target_height, quality = wx.IMAGE_QUALITY_HIGH) else: _log.debug('cannot resize image [%s] to %sx%s', self.__filename, target_width, target_height) except Exception: _log.exception('cannot resize image [%s]', self.__filename) return False try: for cnt in range(abs(self.__current_rotation) // 90): img_data = img_data.Rotate90(clockwise = self.__current_rotation > 0) except Exception: _log.exception('cannot rotate image from [%s]', self.__filename) return False try: bitmap = wx.Bitmap(img_data) except Exception: _log.exception('cannot create bitmap from image in [%s]', self.__filename) return False return bitmap #-------------------------------------------------------- def refresh(self): self.SetBitmap(self.__empty_bmp) if not self.__filename: return None bitmap = self.__adjust_bitmap() if not bitmap: return False self.SetBitmap(bitmap) return TrueControl showing an image.
Default class constructor.
:param
parent: parent window, must not beNone; :param integerID: window identifier. A value of -1 indicates a default value; :param wx.Bitmapbitmap: the static bitmap used in the control; :parampos: the control position. A value of (-1, -1) indicates a default position, chosen by either the windowing system or wxPython, depending on platform; :paramsize: the control size. A value of (-1, -1) indicates a default size, chosen by either the windowing system or wxPython, depending on platform; :param integerstyle: the underlying :class:wx.Controlstyle; :param stringname: the widget name.:type parent: :class:
wx.Window:type pos: tuple or :class:wx.Point:type size: tuple or :class:wx.SizeAncestors
- wx.lib.statbmp.GenStaticBitmap
- wx._core.Control
- wx._core.Window
- wx._core.WindowBase
- wx._core.EvtHandler
- wx._core.Object
- wx._core.Trackable
- sip.wrapper
- sip.simplewrapper
Instance variables
prop filename-
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def __get_filename(self): return self.__filename
Methods
def process_char(self, char) ‑> bool-
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def process_char(self, char) -> bool: """Call action based on character. Returns: True/False based on whether the character mapped to a command. """ match char: case 'r': self.__current_rotation += 90 if self.__current_rotation == 360: self.__current_rotation = 0 self.refresh() case 'l': self.__current_rotation -= 90 if self.__current_rotation == -360: self.__current_rotation = 0 self.refresh() case 'o': self.__zoom_count = 0 self.__current_rotation = 0 self.refresh() case '+': self.__zoom_count += 1 self.refresh() case '-': self.__zoom_count -= 1 self.refresh() case _: return False return TrueCall action based on character.
Returns
True/False based on whether the character mapped to a command.
def process_keycode(self, keycode) ‑> bool-
Expand source code
def process_keycode(self, keycode) -> bool: """Call action based on translated key code. Returns: True/False based on whether the key code mapped to a command. """ return FalseCall action based on translated key code.
Returns
True/False based on whether the key code mapped to a command.
def refresh(self)-
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def refresh(self): self.SetBitmap(self.__empty_bmp) if not self.__filename: return None bitmap = self.__adjust_bitmap() if not bitmap: return False self.SetBitmap(bitmap) return True