XRC generates object class="unknown" name="dataViewListCtrlLog"

[wjhutton]

Operating system: WIndows 10 Version: 10.0.10011.16384
wxPython version & source: 4.2.0 installed with pip

Python version & source: Python 3.9.7 (tags/v3.9.7:1016ef3, Aug 30 2021, 20:19:38) [MSC v.1929 64 bit (AMD64)] on win32
Description of the problem:

The program and xrc files created by wxFormbuilder 3.10.1

python code
self.dataViewListCtrlLog = wx.dataview.DataViewListCtrl( self.panelMain, wx.ID_ANY, wx.DefaultPosition, wx.Size( 280,180 ), 0 )

xrc code has an error Search for "unknown"

Code Example (click to expand)

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<resource xmlns="http://www.wxwidgets.org/wxxrc" version="2.5.3.0">
	<object class="wxFrame" name="FrameMain">
		<style>wxDEFAULT_FRAME_STYLE|wxTAB_TRAVERSAL</style>
		<size>500,300</size>
		<title>List control demo</title>
		<centered>1</centered>
		<aui_managed>0</aui_managed>
		<object class="wxBoxSizer">
			<orient>wxVERTICAL</orient>
			<object class="sizeritem">
				<option>1</option>
				<flag>wxEXPAND | wxALL</flag>
				<border>5</border>
				<object class="wxPanel" name="panelMain">
					<style>wxTAB_TRAVERSAL</style>
					<object class="wxGridBagSizer">
						<vgap>0</vgap>
						<hgap>0</hgap>
						<growablecols></growablecols>
						<growablerows></growablerows>
						<object class="sizeritem">
							<cellpos>0,0</cellpos>
							<cellspan>1,1</cellspan>
							<flag>wxEXPAND</flag>
							<border>5</border>
							<object class="wxGridBagSizer">
								<vgap>0</vgap>
								<hgap>0</hgap>
								<growablecols></growablecols>
								<growablerows></growablerows>
								<object class="sizeritem">
									<cellpos>0,0</cellpos>
									<cellspan>1,1</cellspan>
									<flag>wxALL</flag>
									<border>5</border>
									<object class="unknown" name="dataViewListCtrlLog" />
								</object>
							</object>
						</object>
						<object class="sizeritem">
							<cellpos>0,1</cellpos>
							<cellspan>1,1</cellspan>
							<flag>wxEXPAND</flag>
							<border>5</border>
							<object class="wxGridBagSizer">
								<vgap>0</vgap>
								<hgap>0</hgap>
								<growablecols></growablecols>
								<growablerows></growablerows>
								<object class="sizeritem">
									<cellpos>0,0</cellpos>
									<cellspan>1,1</cellspan>
									<flag>wxALL</flag>
									<border>5</border>
									<object class="wxButton" name="butnAdd">
										<font>
											<size>8</size>
											<style>normal</style>
											<weight>normal</weight>
											<underlined>0</underlined>
										</font>
										<label>Add</label>
										<default>0</default>
										<auth_needed>0</auth_needed>
										<markup>0</markup>
										<bitmap />
									</object>
								</object>
								<object class="sizeritem">
									<cellpos>3,0</cellpos>
									<cellspan>1,1</cellspan>
									<flag>wxALL</flag>
									<border>5</border>
									<object class="wxButton" name="buttonDel">
										<label>Delete</label>
										<default>0</default>
										<auth_needed>0</auth_needed>
										<markup>0</markup>
										<bitmap />
									</object>
								</object>
								<object class="sizeritem">
									<cellpos>1,0</cellpos>
									<cellspan>1,1</cellspan>
									<flag>wxALL</flag>
									<border>5</border>
									<object class="wxButton" name="butnEdit">
										<label>Edit</label>
										<default>0</default>
										<auth_needed>0</auth_needed>
										<markup>0</markup>
										<bitmap />
									</object>
								</object>
							</object>
						</object>
					</object>
				</object>
			</object>
		</object>
	</object>
</resource>
<details>

[sodevel]

Components for which wxFB does not contain XRC import or export code get exported as unknown class. There are two possible reasons why wxFB does not contain such code, either because XRC does not support this control or because no one has added such code to wxFB. Looking at the current XRC file format, it has some very limited support for this control, basically it only supports the control itself but not any added columns.

[wjhutton]

Actually this control works perfectly with the Python code generated in the python tab. The control's columns are added after the control is instantiated, allowing greater flexibility. In my usage I require this flexibility. You are likely correct that this control needs code added or corrected in FormBuilder. I suspect someone recognized the issue and was waiting for the wxpython team to resolve the issue. When the xrc xml code is edited specifying the class, it does not render properly, so I realize you cannot fix it on your own. There truly is a problem with wxPtyhon rendering from the edited xrc which i have reported to the wxpython team. The control ignores the size option, and i can't resize it which is a wxpython issue. Hopefully your team and wxpython' s team can work together and resolve this issue. It is rather annoying that the problem exists. In the meantime I created a static text object in the sizer cell, and set its width, and height to reserve space. Then after Xrc is processed, I added the wxpthon code to create the object, and place it over the static text object. Fortunately the loading of the Xrc file steps over the objects with class = unknown. Please keep me advised as your teams work to resolve this

…

On Tue, Feb 14, 2023 at 12:49 PM Steffen Olszewski ***@***.***> wrote: Components for which wxFB does not contain XRC import or export code get exported as unknown class. There are two possible reasons why wxFB does not contain such code, either because XRC does not support this control or because no one has added such code to wxFB. Looking at the current XRC file format <https://docs.wxwidgets.org/latest/overview_xrcformat.html>, it has some very limited support for this control, basically it only supports the control itself but not any added columns. — Reply to this email directly, view it on GitHub <#771 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AWDE6TJ2MOW2QJVE4Y5FULDWXPARBANCNFSM6AAAAAAUXCR24Q> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[sodevel]

XRC != code. XRC is a declarative way to describe GUIs but offers much less functionality than code.

Your use case you described above is, according to the documentation i linked in my last post, currently not possible to realize because this feature is not available in wxWidgets itself. So, to get your use case done, first wxWidgets must be updated. Then these changes must be ported to wxPython. And as the last step wxFB must be updated.

Right now, your use case can only be done by code.

I can't say anything about your wxPython issues, i don't do any Python. The best i could do right now is, add XRC support for what is currently possible, that is the control itself together with basic properties like style flags. However, i currently don't have the time for this, so PRs welcome.