SOLVED Adding a icon to a treeview field.

Is it possible to add a icon (thumbnail) to a treeview field?
At this moment the Treeview field is just a (filename) string.

For example:
1e640f29-28e4-4707-a61f-60c990f626da-image.png

Yes, you can basically draw everything you want wih DrawCell()

The DrawInfos frame is actually a UserArea, so you draw Bitmaps inside this like you do in normal UAs.

I confirm that DrawCell is the way to go.
Cheers,
Maxime.

I thought that DrawCell is only for LV_USER fields and not for LV_TREE fields.
See comment in example

        """
        Draw into a Cell, only called for column of type LV_USER
        """

ecaf0cf7-0e73-4e90-bce9-07ab0bf425dd-image.png

I like to do something similar to the content browser.
9170075a-52c5-4809-b548-e4bfa72965ea-image.png

Hi @pim sorry for the delay,
I will take as base the code provided in No multiple selection in Treeview not working?.

My comment is actually a bit wrong since DrawCell is called for all of the following types LV_USER, LV_USERTREE, LV_CHECKBOXUSER (but I included only LV_USER on my comment because in my example I did use only LV_USER.

So in the InitValues instead of layout.SetInt32(ID_NAME, c4d.LV_TREE) I used layout.SetInt32(ID_NAME, c4d.LV_USERTREE).

And here the DrawCell Method.

    def DrawCell(self, root, userdata, obj, col, drawinfo, bgColor):
        """
        Draw into a Cell, only called for column of type LV_USER
        """
        if col == ID_NAME:
            geUserArea = drawinfo["frame"]
            ICON_SIZE = drawinfo["height"]
            TEXT_SPACER = 6
            bgColor = c4d.COLOR_SB_TEXTHG1 if drawinfo["line"] % 2 else c4d.COLOR_SB_TEXTHG2

            # Draw icon bmp, in our case a cube bitmap
            cube = c4d.BaseObject(c4d.Ocube)
            cubeIcon = cube.GetIconEx()
            bmp = cubeIcon.GetGuiScalePart()
            
            geUserArea.DrawSetPen(bgColor)
            geUserArea.DrawBitmap(bmp, drawinfo["xpos"], drawinfo["ypos"], ICON_SIZE, ICON_SIZE, 0, 0, bmp.GetBw(), bmp.GetBh(), c4d.BMP_ALLOWALPHA)

            # Draw name
            name = str(obj)
            fontHeight = geUserArea.DrawGetFontHeight()
            fontWidth = geUserArea.DrawGetTextWidth(name)

            x = drawinfo["xpos"] + ICON_SIZE + TEXT_SPACER
            y = drawinfo["ypos"] + (ICON_SIZE - fontHeight) / 2
            
            txtColor = c4d.COLOR_SB_TEXT_ACTIVE1 if obj.IsSelected else c4d.COLOR_SB_TEXT
            geUserArea.DrawSetTextCol(txtColor, bgColor)
            
            geUserArea.DrawText(name, x, y)

        elif col == ID_OTHER:
            name = obj.otherData
            geUserArea = drawinfo["frame"]
            
            fontWidth = geUserArea.DrawGetTextWidth(name)
            fontHeight = geUserArea.DrawGetFontHeight()
            x = drawinfo["xpos"]
            y = drawinfo["ypos"] + (drawinfo["height"] - fontHeight) / 2
            drawinfo["frame"].DrawText(name, x, y)

Cheers,
Maxime.

Great, thank you.
-Pim

Your example works great.
Now in my plugin I do not want a Checkbox or Other. Just the name.
When I change your example to below, nothing is shown, but I can see that Drawcell() is called.

    def InitValues(self):
        # Initialize the column layout for the TreeView.
        layout = c4d.BaseContainer()
        #layout.SetLong(ID_CHECKBOX, c4d.LV_CHECKBOX)
        #layout.SetLong(ID_NAME, c4d.LV_TREE)
        layout.SetInt32(ID_NAME, c4d.LV_USERTREE)
        #layout.SetLong(ID_OTHER, c4d.LV_USER)
        self._treegui.SetLayout(1, layout)

        # Set the header titles.
        self._treegui.SetHeaderText(ID_CHECKBOX, "Check")
        self._treegui.SetHeaderText(ID_NAME, "Name")
        self._treegui.SetHeaderText(ID_OTHER, "Other")
        self._treegui.Refresh()

        # Set TreeViewFunctions instance used by our CUSTOMGUI_TREEVIEW
        self._treegui.SetRoot(self._treegui, self._listView, None)
        return True

Here before removing the checkbox and other.
b9194150-cc98-4831-ab3b-b3c5e6a1cd6e-image.png

Here after removing checkbox and name.
4849f8f0-3de5-455c-b458-19779d4650d4-image.png
I tested it on R20.
Here the whole script.

import c4d
import weakref

# Be sure to use a unique ID obtained from http://www.plugincafe.com/.
PLUGIN_ID = 1000010 # TEST ID ONLY

# TreeView Column IDs.
ID_CHECKBOX = 1
ID_NAME = 2
ID_OTHER = 3

def TextureObjectIterator(lst):
    
    for parentTex in lst:
        yield parentTex
        for childTex in TextureObjectIterator(parentTex.GetChildren()):
            yield childTex

class TextureObject(object):
    """
    Class which represent a texture, aka an Item in our list
    """
    texturePath = "TexPath"
    otherData = "OtherData"
    _selected = False
    _open = True

    def __init__(self, texturePath):
        self.texturePath = texturePath
        self.otherData += texturePath
        self.children = []
        self._parent = None

    @property
    def IsSelected(self):
        return self._selected

    def Select(self):
        self._selected = True

    def Deselect(self):
        self._selected = False

    @property
    def IsOpened(self):
        return self._open

    def Open(self):
        self._open = True
    
    def Close(self):
        self._open = False

    def AddChild(self, obj):
        obj._parent = weakref.ref(self)
        self.children.append(obj)
        
    def GetChildren(self):
        return self.children

    def GetParent(self):
        if self._parent:
            return self._parent()
        
        return None
        
    def __repr__(self):
        return str(self)

    def __str__(self):
        return self.texturePath


class ListView(c4d.gui.TreeViewFunctions):

    def __init__(self):
        self.listOfTexture = list() # Store all objects we need to display in this list

        # Add some defaults values 
        t1 = TextureObject("T1")
        t2 = TextureObject("T2")
        t3 = TextureObject("T3")
        t4 = TextureObject("T4")

        self.listOfTexture.extend([t1, t2, t3, t4])


    def IsResizeColAllowed(self, root, userdata, lColID):
        return True

    def IsTristate(self, root, userdata):
        return False

    def GetColumnWidth(self, root, userdata, obj, col, area):
        return 80  # All have the same initial width

    def IsMoveColAllowed(self, root, userdata, lColID):
        # The user is allowed to move all columns.
        # TREEVIEW_MOVE_COLUMN must be set in the container of AddCustomGui.
        return True

    def GetFirst(self, root, userdata):
        """
        Return the first element in the hierarchy, or None if there is no element.
        """
        rValue = None if not self.listOfTexture else self.listOfTexture[0]
        return rValue

    def GetDown(self, root, userdata, obj):
        """
        Return a child of a node, since we only want a list, we return None everytime
        """
        children = obj.GetChildren()
        if children:
            return children[0]

        return None

    def GetNext(self, root, userdata, obj):
        """
        Returns the next Object to display after arg:'obj'
        """
        rValue = None

        # If does have a child it means it's a child.
        objParent = obj.GetParent()
        listToSearch = objParent.GetChildren() if objParent is not None else self.listOfTexture

        currentObjIndex = listToSearch.index(obj)
        nextIndex = currentObjIndex + 1
        if nextIndex < len(listToSearch):
            rValue = listToSearch[nextIndex]

        return rValue

    def GetPred(self, root, userdata, obj):
        """
        Returns the previous Object to display before arg:'obj'
        """
        rValue = None

        # If does have a child it means it's a child.
        objParent = obj.GetParent()
        listToSearch = objParent.GetChildren() if objParent is not None else self.listOfTexture

        currentObjIndex = listToSearch.index(obj)
        predIndex = currentObjIndex - 1
        if 0 <= predIndex < len(listToSearch):
            rValue = listToSearch[predIndex]

        return rValue

    def GetId(self, root, userdata, obj):
        """
        Return a unique ID for the element in the TreeView.
        """
        return hash(obj)

    def Select(self, root, userdata, obj, mode):
        """
        Called when the user selects an element.
        """
        if mode == c4d.SELECTION_NEW:
            for tex in self.listOfTexture:
                tex.Deselect()
            obj.Select()
        elif mode == c4d.SELECTION_ADD:
            obj.Select()
        elif mode == c4d.SELECTION_SUB:
            obj.Deselect()

    def IsSelected(self, root, userdata, obj):
        """
        Returns: True if *obj* is selected, False if not.
        """
        return obj.IsSelected

    def SetCheck(self, root, userdata, obj, column, checked, msg):
        """
        Called when the user clicks on a checkbox for an object in a
        `c4d.LV_CHECKBOX` column.
        """
        if checked:
            obj.Select()
        else:
            obj.Deselect()

    def IsChecked(self, root, userdata, obj, column):
        """
        Returns: (int): Status of the checkbox in the specified *column* for *obj*.
        """
        if obj.IsSelected:
            return c4d.LV_CHECKBOX_CHECKED | c4d.LV_CHECKBOX_ENABLED
        else:
            return c4d.LV_CHECKBOX_ENABLED

    def IsOpened(self, root, userdata, obj):
        """
        Returns: (bool): Status If it's opened = True (folded) or closed = False.
        """
        # If there is some children
        return obj.IsOpened

    def Open(self, root, userdata, obj, onoff):
        """
        Called when the user clicks on a folding state of an object to display/hide its children
        """
        if onoff:
            obj.Open()

        else:
            obj.Close()

    def GetName(self, root, userdata, obj):
        """
        Returns the name to display for arg:'obj', only called for column of type LV_TREE
        """
        return str(obj) # Or obj.texturePath

    def DrawCell(self, root, userdata, obj, col, drawinfo, bgColor):
        """
        Draw into a Cell, only called for column of type LV_USER
        """
        if col == ID_NAME:
            print "Drawcell obj: ", str(obj)
            geUserArea = drawinfo["frame"]
            ICON_SIZE = drawinfo["height"]
            TEXT_SPACER = 6
            bgColor = c4d.COLOR_SB_TEXTHG1 if drawinfo["line"] % 2 else c4d.COLOR_SB_TEXTHG2

            # Draw icon bmp, in our case a cube bitmap
            #cube = c4d.BaseObject(c4d.Ocube)
            #cubeIcon = cube.GetIconEx()
            #bmp = cubeIcon.GetGuiScalePart()
            bmp = c4d.bitmaps.InitResourceBitmap(c4d.RESOURCEIMAGE_ARROWUP)
            
            geUserArea.DrawSetPen(bgColor)
            geUserArea.DrawBitmap(bmp, drawinfo["xpos"], drawinfo["ypos"], ICON_SIZE, ICON_SIZE, 0, 0, bmp.GetBw(), bmp.GetBh(), c4d.BMP_ALLOWALPHA)

            # Draw name
            name = str(obj)
            fontHeight = geUserArea.DrawGetFontHeight()
            fontWidth = geUserArea.DrawGetTextWidth(name)

            x = drawinfo["xpos"] + ICON_SIZE + TEXT_SPACER
            y = drawinfo["ypos"] + (ICON_SIZE - fontHeight) / 2
            
            txtColor = c4d.COLOR_SB_TEXT_ACTIVE1 if obj.IsSelected else c4d.COLOR_SB_TEXT
            geUserArea.DrawSetTextCol(txtColor, bgColor)
            
            geUserArea.DrawText(name, x, y)


    def DoubleClick(self, root, userdata, obj, col, mouseinfo):
        """
        Called when the user double-clicks on an entry in the TreeView.

        Returns:
          (bool): True if the double-click was handled, False if the
            default action should kick in. The default action will invoke
            the rename procedure for the object, causing `SetName()` to be
            called.
        """
        c4d.gui.MessageDialog("You clicked on " + str(obj))
        return True

    def DeletePressed(self, root, userdata):
        "Called when a delete event is received."
        for tex in reversed(list(TextureObjectIterator(self.listOfTexture))):
            if tex.IsSelected:
                listToRemove = objParent.GetChildren() if objParent is not None else self.listOfTexture
                listToRemove.remove(tex)

class TestDialog(c4d.gui.GeDialog):
    _treegui = None # Our CustomGui TreeView
    _listView = ListView() # Our Instance of c4d.gui.TreeViewFunctions

    def CreateLayout(self):
        # Create the TreeView GUI.
        customgui = c4d.BaseContainer()
        customgui.SetBool(c4d.TREEVIEW_BORDER, c4d.BORDER_THIN_IN)
        customgui.SetBool(c4d.TREEVIEW_HAS_HEADER, True) # True if the tree view may have a header line.
        customgui.SetBool(c4d.TREEVIEW_HIDE_LINES, False) # True if no lines should be drawn.
        customgui.SetBool(c4d.TREEVIEW_MOVE_COLUMN, True) # True if the user can move the columns.
        customgui.SetBool(c4d.TREEVIEW_RESIZE_HEADER, True) # True if the column width can be changed by the user.
        customgui.SetBool(c4d.TREEVIEW_FIXED_LAYOUT, True) # True if all lines have the same height.
        customgui.SetBool(c4d.TREEVIEW_ALTERNATE_BG, True) # Alternate background per line.
        customgui.SetBool(c4d.TREEVIEW_CURSORKEYS, True) # True if cursor keys should be processed.
        customgui.SetBool(c4d.TREEVIEW_NOENTERRENAME, False) # Suppresses the rename popup when the user presses enter.
        customgui.SetBool(c4d.TREEVIEW_NO_MULTISELECT, True)

        self._treegui = self.AddCustomGui( 1000, c4d.CUSTOMGUI_TREEVIEW, "", c4d.BFH_SCALEFIT | c4d.BFV_SCALEFIT, 300, 300, customgui)
        if not self._treegui:
            print "[ERROR]: Could not create TreeView"
            return False

        self.AddButton(1001, c4d.BFH_CENTER, name="Add")
        self.AddButton(1002, c4d.BFH_CENTER, name="Add Child to selected")
        return True

    def InitValues(self):
        # Initialize the column layout for the TreeView.
        layout = c4d.BaseContainer()
        #layout.SetLong(ID_CHECKBOX, c4d.LV_CHECKBOX)
        #layout.SetLong(ID_NAME, c4d.LV_TREE)
        layout.SetInt32(ID_NAME, c4d.LV_USERTREE)
        #layout.SetLong(ID_OTHER, c4d.LV_USER)
        self._treegui.SetLayout(1, layout)

        # Set the header titles.
        self._treegui.SetHeaderText(ID_CHECKBOX, "Check")
        self._treegui.SetHeaderText(ID_NAME, "Name")
        self._treegui.SetHeaderText(ID_OTHER, "Other")
        self._treegui.Refresh()

        # Set TreeViewFunctions instance used by our CUSTOMGUI_TREEVIEW
        self._treegui.SetRoot(self._treegui, self._listView, None)
        return True

    def Command(self, id, msg):
        # Click on button
        if id == 1001:
            # Add data to our DataStructure (ListView)
            newID = len(self._listView.listOfTexture) + 1 
            tex = TextureObject("T{}".format(newID))
            self._listView.listOfTexture.append(tex)

            # Refresh the TreeView
            self._treegui.Refresh()
            
        elif id == 1002:
            for parentTex in TextureObjectIterator(self._listView.listOfTexture):
                if not parentTex.IsSelected:
                    continue

                newID = len(parentTex.GetChildren()) + 1 
                tex = TextureObject("T{0}.{1}".format(str(parentTex), newID))
                parentTex.AddChild(tex)
                
            # Refresh the TreeView
            self._treegui.Refresh()

        return True


def main():
    global dialog
    dialog = TestDialog()
    dialog.Open(c4d.DLG_TYPE_ASYNC, defaulth=600, defaultw=600)


if __name__ == "__main__":
    main()

Hi @pim, if you only have user columns you need to define the actual height of these columns so the GeUserArea know which size she must take.
To do so you have to override TreeViewFunctions.GetLineHeight.

Cheers,
Maxime.
.

Yes, that solved it.
Thanks.