diff --git a/fsl/fslview/displaycontext/displaycontext.py b/fsl/fslview/displaycontext/displaycontext.py
index 8ab23f27edef7f881a7eca9d1957f33669bfe4df..71c45aae78c2d4957d8ccfb7f7613b53f1bad468 100644
--- a/fsl/fslview/displaycontext/displaycontext.py
+++ b/fsl/fslview/displaycontext/displaycontext.py
@@ -97,6 +97,8 @@ class DisplayContext(props.SyncableHasProperties):
def destroy(self):
+ self.__overlayList.removeListener('overlays', self.__name)
+
for overlay, display in self.__displays.items():
display.destroy()
diff --git a/fsl/fslview/frame.py b/fsl/fslview/frame.py
index 4bd7990b2c6229e230a8a003bd062c1f6bbc7788..440624556dd927160fbc6a93b3c5f03fbe6a7b60 100644
--- a/fsl/fslview/frame.py
+++ b/fsl/fslview/frame.py
@@ -202,7 +202,8 @@ class FSLViewFrame(wx.Frame):
menuBar.Remove(menuIdx)
# Calling fslpanel.FSLViewPanel.destroy()
- # - I think that the AUINotebook does the
+ # and DisplayContext.destroy() - the
+ # AUINotebook should do the
# wx.Window.Destroy side of things ...
panel.destroy()
dctx .destroy()
diff --git a/fsl/fslview/gl/lightboxcanvas.py b/fsl/fslview/gl/lightboxcanvas.py
index e3b08e174b65aa429f2f9d84151e4717de380a4f..219058c1c89c573dc5b26a8ceeb1d03af5994b75 100644
--- a/fsl/fslview/gl/lightboxcanvas.py
+++ b/fsl/fslview/gl/lightboxcanvas.py
@@ -212,6 +212,22 @@ class LightBoxCanvas(slicecanvas.SliceCanvas):
'{}_zPosChanged'.format(self.name),
self._zPosChanged)
+ def destroy(self):
+
+ self.removeListener('pos', '{}_zPosChanged'.format(self.name))
+ self.removeListener('sliceSpacing', self.name)
+ self.removeListener('ncols', self.name)
+ self.removeListener('nrows', self.name)
+ self.removeListener('zrange', self.name)
+ self.removeListener('showGridLines', self.name)
+ self.removeListener('highlightSlice', self.name)
+ self.removeListener('topRow', self.name)
+
+ if self._offscreenRenderTexture is not None:
+ self._offscreenRenderTexture.destroy()
+
+ slicecanvas.SliceCanvas.destroy(self)
+
def _topRowChanged(self, *a):
"""Called when the :attr:`topRow` property changes. Adjusts display
diff --git a/fsl/fslview/gl/slicecanvas.py b/fsl/fslview/gl/slicecanvas.py
index e50a14797d295371e8af521feb319b0f0344745d..6da93047997727b833b6344d19c007afa9977d4b 100644
--- a/fsl/fslview/gl/slicecanvas.py
+++ b/fsl/fslview/gl/slicecanvas.py
@@ -308,6 +308,47 @@ class SliceCanvas(props.HasProperties):
self._overlayBoundsChanged)
+ def destroy(self):
+ """This method must be called when this ``SliceCanvas`` is no longer
+ being used.
+
+ It removes listeners from all :class:`.OverlayList`,
+ :class:`.DisplayContext`, and :class:`.Display` instances, and
+ destroys OpenGL representations of all overlays.
+ """
+ self.removeListener('zax', self.name)
+ self.removeListener('pos', self.name)
+ self.removeListener('displayBounds', self.name)
+ self.removeListener('showCursor', self.name)
+ self.removeListener('invertX', self.name)
+ self.removeListener('invertY', self.name)
+ self.removeListener('zoom', self.name)
+ self.removeListener('renderMode', self.name)
+
+ self.overlayList.removeListener('overlays', self.name)
+ self.displayCtx .removeListener('bounds', self.name)
+ self.displayCtx .removeListener('overlayOrder', self.name)
+
+ for overlay in self.overlayList:
+ disp = self.displayCtx.getDisplay(overlay)
+ globj = self._glObjects[overlay]
+
+ disp.removeListener('overlayType', self.name)
+ disp.removeListener('enabled', self.name)
+ disp.unbindProps( 'softwareMode', self)
+
+ globj.destroy()
+
+ rt, rtName = self._prerenderTextures.get(overlay, (None, None))
+ ot = self._offscreenTextures.get(overlay, None)
+
+ if rt is not None: glresources.delete(rtName)
+ if ot is not None: ot .destroy()
+
+ self.overlayList = None
+ self.displayCxt = None
+
+
def _initGL(self):
"""Call the _overlayListChanged method - it will generate
any necessary GL data for each of the overlays
@@ -516,7 +557,7 @@ class SliceCanvas(props.HasProperties):
self._refresh()
- def __genGLObject(self, overlay, display, updateRenderTextures=True):
+ def __genGLObject(self, overlay, updateRenderTextures=True):
"""Creates a :class:`.GLObject` instance for the given ``overlay``,
destroying any existing instance.
@@ -525,6 +566,8 @@ class SliceCanvas(props.HasProperties):
render texture associated with the overlay is destroyed.
"""
+ display = self.displayCtx.getDisplay(overlay)
+
# Tell the previous GLObject (if
# any) to clean up after itself
globj = self._glObjects.pop(overlay, None)
@@ -559,6 +602,19 @@ class SliceCanvas(props.HasProperties):
self._glObjects[overlay] = globj
+ if not display.isBound('softwareMode', self):
+ display.bindProps('softwareMode', self)
+
+ display.addListener('overlayType',
+ self.name,
+ self.__overlayTypeChanged,
+ overwrite=True)
+
+ display.addListener('enabled',
+ self.name,
+ self._refresh,
+ overwrite=True)
+
return globj
@@ -590,18 +646,7 @@ class SliceCanvas(props.HasProperties):
if overlay in self._glObjects:
continue
- display = self.displayCtx.getDisplay(overlay)
-
- self.__genGLObject(overlay, display, updateRenderTextures=False)
-
- # Bind Display.softwareMode to SliceCanvas.softwareMode
- display.bindProps('softwareMode', self)
-
- display.addListener('overlayType',
- self.name,
- self.__overlayTypeChanged)
-
- display.addListener('enabled', self.name, self._refresh)
+ self.__genGLObject(overlay, updateRenderTextures=False)
self._updateRenderTextures()
self._resolutionLimitChange()
@@ -919,7 +964,7 @@ class SliceCanvas(props.HasProperties):
continue
if globj is None:
- globj = self.__genGLObject(overlay, display)
+ globj = self.__genGLObject(overlay)
# On-screen rendering - the globject is
# rendered directly to the screen canvas
diff --git a/fsl/fslview/gl/wxgllightboxcanvas.py b/fsl/fslview/gl/wxgllightboxcanvas.py
index 60a9074c2fbaf08a51093a3bbcfa49a5fc6ca86d..75d1fe1589dbfce1e76f4ba5ce423e0fe40a0696 100644
--- a/fsl/fslview/gl/wxgllightboxcanvas.py
+++ b/fsl/fslview/gl/wxgllightboxcanvas.py
@@ -8,17 +8,12 @@
:class:`.LightBoxCanvas`, and a :class:`wx.glcanvas.GLCanvas`.
"""
-import logging
import wx
import wx.glcanvas as wxgl
import lightboxcanvas as lightboxcanvas
import fsl.fslview.gl as fslgl
-import fsl.fslview.gl.resources as glresources
-
-
-log = logging.getLogger(__name__)
class WXGLLightBoxCanvas(lightboxcanvas.LightBoxCanvas,
@@ -41,58 +36,6 @@ class WXGLLightBoxCanvas(lightboxcanvas.LightBoxCanvas,
displayCtx,
zax)
fslgl.WXGLCanvasTarget .__init__(self)
-
- # the overlay list is probably going to outlive
- # this SliceCanvas object, so we do the right
- # thing and remove our listeners when we die
- def onDestroy(ev):
- ev.Skip()
-
- if ev.GetEventObject() is not self:
- return
-
- self.removeListener('zax', self.name)
- self.removeListener('pos', self.name)
- self.removeListener('pos',
- '{}_zPosChanged'.format(self.name))
- self.removeListener('displayBounds', self.name)
- self.removeListener('showCursor', self.name)
- self.removeListener('invertX', self.name)
- self.removeListener('invertY', self.name)
- self.removeListener('zoom', self.name)
- self.removeListener('sliceSpacing', self.name)
- self.removeListener('ncols', self.name)
- self.removeListener('nrows', self.name)
- self.removeListener('zrange', self.name)
- self.removeListener('showGridLines', self.name)
- self.removeListener('highlightSlice', self.name)
- self.removeListener('topRow', self.name)
- self.removeListener('renderMode', self.name)
-
- self.overlayList.removeListener('overlays', self.name)
- self.displayCtx .removeListener('bounds', self.name)
- self.displayCtx .removeListener('overlayOrder', self.name)
-
- for overlay in self.overlayList:
-
- disp = self.displayCtx.getDisplay(overlay)
- globj = self._glObjects[overlay]
-
- disp.removeListener('overlayType', self.name)
- disp.removeListener('enabled', self.name)
- disp.removeListener('softwareMode', self.name)
-
- globj.destroy()
-
- rt, rtName = self._prerenderTextures.get(overlay, (None, None))
-
- if rt is not None:
- glresources.delete(rtName)
-
- if self._offscreenRenderTexture is not None:
- self._offscreenRenderTexture.destroy()
-
- self.Bind(wx.EVT_WINDOW_DESTROY, onDestroy)
# When the canvas is resized, we have to update
# the display bounds to preserve the aspect ratio
diff --git a/fsl/fslview/gl/wxglslicecanvas.py b/fsl/fslview/gl/wxglslicecanvas.py
index ad0778e06e8062ac6f1552f132e1530fcb026e5b..502679b7f21a6999e3875d391afd7efa1d9ffdda 100644
--- a/fsl/fslview/gl/wxglslicecanvas.py
+++ b/fsl/fslview/gl/wxglslicecanvas.py
@@ -13,17 +13,12 @@ data (although most of the functionality is provided by the
:class:`.SliceCanvas` class).
"""
-import logging
import wx
-import wx.glcanvas as wxgl
+import wx.glcanvas as wxgl
-import slicecanvas as slicecanvas
-import fsl.fslview.gl.resources as glresources
-import fsl.fslview.gl as fslgl
-
-
-log = logging.getLogger(__name__)
+import slicecanvas as slicecanvas
+import fsl.fslview.gl as fslgl
class WXGLSliceCanvas(slicecanvas.SliceCanvas,
@@ -43,46 +38,6 @@ class WXGLSliceCanvas(slicecanvas.SliceCanvas,
wxgl.GLCanvas .__init__(self, parent)
slicecanvas.SliceCanvas.__init__(self, overlayList, displayCtx, zax)
fslgl.WXGLCanvasTarget .__init__(self)
-
- # the image list is probably going to outlive
- # this SliceCanvas object, so we do the right
- # thing and remove our listeners when we die
- def onDestroy(ev):
- ev.Skip()
-
- if ev.GetEventObject() is not self:
- return
-
- self.removeListener('zax', self.name)
- self.removeListener('pos', self.name)
- self.removeListener('displayBounds', self.name)
- self.removeListener('showCursor', self.name)
- self.removeListener('invertX', self.name)
- self.removeListener('invertY', self.name)
- self.removeListener('zoom', self.name)
- self.removeListener('renderMode', self.name)
-
- self.overlayList.removeListener('overlays', self.name)
- self.displayCtx .removeListener('bounds', self.name)
- self.displayCtx .removeListener('overlayOrder', self.name)
-
- for overlay in self.overlayList:
- disp = self.displayCtx.getDisplay(overlay)
- globj = self._glObjects[overlay]
-
- disp.removeListener('overlayType', self.name)
- disp.removeListener('enabled', self.name)
- disp.removeListener('softwareMode', self.name)
-
- globj.destroy()
-
- rt, rtName = self._prerenderTextures.get(overlay, (None, None))
- ot = self._offscreenTextures.get(overlay, None)
-
- if rt is not None: glresources.delete(rtName)
- if ot is not None: ot .destroy()
-
- self.Bind(wx.EVT_WINDOW_DESTROY, onDestroy)
# When the canvas is resized, we have to update
# the display bounds to preserve the aspect ratio
diff --git a/fsl/fslview/views/lightboxpanel.py b/fsl/fslview/views/lightboxpanel.py
index 54178ab81f6d301bfcadeafdab130517d9aa4349..616e3ee7a165dc6064082c5686202b6a2396b132 100644
--- a/fsl/fslview/views/lightboxpanel.py
+++ b/fsl/fslview/views/lightboxpanel.py
@@ -138,6 +138,8 @@ class LightBoxPanel(canvaspanel.CanvasPanel):
self._displayCtx .removeListener('selectedOverlay', self._name)
self._overlayList.removeListener('overlays', self._name)
+ self._lbCanvas.destroy()
+
canvaspanel.CanvasPanel.destroy(self)
diff --git a/fsl/fslview/views/orthopanel.py b/fsl/fslview/views/orthopanel.py
index d503048ac44d99c1ed5ff3274cd49b44a9816aad..567f29e840895d9dc4b9c1e95a9cc1896d470547 100644
--- a/fsl/fslview/views/orthopanel.py
+++ b/fsl/fslview/views/orthopanel.py
@@ -184,7 +184,6 @@ class OrthoPanel(canvaspanel.CanvasPanel):
this OrthoPanel. So when this panel is destroyed, all those
registered listeners are removed.
"""
- canvaspanel.CanvasPanel.destroy(self)
self._displayCtx .removeListener('location', self._name)
self._displayCtx .removeListener('bounds', self._name)
@@ -192,6 +191,10 @@ class OrthoPanel(canvaspanel.CanvasPanel):
self._displayCtx .removeListener('overlayOrder', self._name)
self._overlayList.removeListener('overlays', self._name)
+ self._xcanvas.destroy()
+ self._ycanvas.destroy()
+ self._zcanvas.destroy()
+
# The _overlayListChanged method adds
# listeners to individual overlays,
# so we have to remove them too
@@ -199,6 +202,8 @@ class OrthoPanel(canvaspanel.CanvasPanel):
opts = self._displayCtx.getOpts(ovl)
opts.removeGlobalListener(self._name)
+ canvaspanel.CanvasPanel.destroy(self)
+
def __onZoom(self, *a):
"""Called when the :attr:`.SceneOpts.zoom` property changes.