LayoutFlushGroup Causes Unexpected Changes in Another Group

Amazing_iKe

Hello,

I’m encountering an issue when I call self.LayoutFlushGroup(self.SHOT_LIST_GROUP).

After using this function to clear the SHOT_LIST_GROUP, another group in my layout, self.FOOTAGE_GROUP (with its own ID), unexpectedly changes its appearance or position.

Image 1: This shows the layout before calling LayoutFlushGroup. Everything looks correct.

Image 2: This shows the layout after calling LayoutFlushGroup. You can see that FOOTAGE_GROUP has changed unexpectedly.

Has anyone experienced something similar? I suspect there may be some dependency between groups or an issue with how the layout hierarchy is managed.

I would really appreciate any insights, suggestions, or recommended best practices to clear and rebuild a group safely without affecting unrelated groups.

Thank you very much for your time and help!

    # 添加位图卡片
    def add_bitmap_card(self, uid : int, path : str, display : str= ''):
        ua = KidooShotManagerUserArea()
        ua.load_card(path, display)
        self.bitmapItems.append(ua)
        self.AddUserArea(uid, c4d.BFH_LEFT | c4d.BFV_TOP)
        self.AttachUserArea(ua, uid)
        return ua

    # 创建Kidoo镜头管理器
    def redrawAllKidooShotCards(self):

        self.LayoutFlushGroup(self.SHOT_LIST_GROUP)  # 删除组内容

        if self.GroupBegin(self.ID_GROUP_UA_REDRAW, c4d.BFH_SCALEFIT | c4d.BFV_SCALEFIT, cols=0, rows=2,
                           title='重绘卡片组', initw=0, inith=0):
            for i in range(10):
                # 加载缩略图
                self.add_bitmap_card(uid=self.SHOT_MANAGER_USER_AREA + i,
                                     path=r'C:\Users\19252\Desktop\test_image\Anime 3840x2160 BOCCHI THE ROCK! Ryo Yamada Gotou Hitori Nijika I.png',
                                     display='#0001')


            self.GroupEnd()  # 明确对应结束此分组

        self.LayoutChanged(self.FOOTAGE_GROUP)
        self.LayoutChanged(self.SHOT_MANAGER_GROUP)
    # <<<<<<<<<<<<<<<<<Kidoo镜头管理器内容区域>>>>>>>>>>>>>>>>>>>>

    # 创建Layout 布局函数
    def CreateLayout(self):
        # 窗口初始化设置
        self.SetTitle('Kidoo-场景管理器' + f' V.{self.WINDOW_VERSION}' )

        # 创建Menu 菜单
        self.CreateMenu()

        # 创建完Menu后，刷新镜头数据
        self.Refresh_Kidoo_Shot_Data()

        # 总体布局
        if self.GroupBegin(self.MAIN_GROUP, c4d.BFH_SCALEFIT | c4d.BFV_SCALEFIT, cols=0, rows=0,
                            title="Kidoo-场景装配器",initw=0, inith=0, groupflags=c4d.BFV_GRIDGROUP_ALLOW_WEIGHTS):

            # ——— 第一次打开时，初始化主组左右列权重：30% / 70% ———
            if not hasattr(self, 'main_weights_saved'):
                # 创建一个 BaseContainer 用于保存主布局的列权重
                self.main_weights = c4d.BaseContainer()
                # 告诉 C4D 这是两列的权重设置
                self.main_weights.SetInt32(c4d.GROUPWEIGHTS_PERCENT_W_CNT, 2)
                # 设置第一列占比：30%
                self.main_weights.SetFloat(c4d.GROUPWEIGHTS_PERCENT_W_VAL + 0, 30.0)
                # 设置第二列占比：70%
                self.main_weights.SetFloat(c4d.GROUPWEIGHTS_PERCENT_W_VAL + 1, 70.0)
                # 标记已初始化，后续就不会重复设置默认值
                self.main_weights_saved = True

            # 每次布局时，将保存的权重加载到 MAIN_GROUP 上，以保持用户上次的拖拽状态
            self.GroupWeightsLoad(self.MAIN_GROUP, self.main_weights)

            # ——— 左边组：FOOTAGE_GROUP ———
            if self.GroupBegin(self.FOOTAGE_GROUP, c4d.BFH_SCALEFIT | c4d.BFV_SCALEFIT, cols=0, rows=2,
                            title="镜头",initw=100, inith=0):
                border_space_pixels = 3
                self.GroupBorderSpace(border_space_pixels, border_space_pixels, border_space_pixels,
                                      border_space_pixels)  # 设置边框空间
                self.GroupBorderNoTitle(c4d.BORDER_BLACK | c4d.BORDER_ACTIVE_1)

                # 创建控件
                self.Kidoo_Shot_Manager_Title()

                # 列表卡片图片
                if self.ScrollGroupBegin(id=self.SHOT_LIST_GROUP,
                                         flags=c4d.BFH_SCALEFIT | c4d.BFV_SCALEFIT,
                                         scrollflags=c4d.SCROLLGROUP_VERT,
                                         initw=0,
                                         inith=0):
                    self.GroupSpace(10, 10)
                    self.GroupBorderNoTitle(c4d.BORDER_ACTIVE_4)
                    self.GroupBorderSpace(5, 5, 5, 5)

                    self.redrawAllKidooShotCards()

                self.GroupEnd()
            self.GroupEnd()

            # ——— 右边组：TAB_GROUP（包含多个子 Tab） ———
            if self.TabGroupBegin(self.TAB_GROUP , c4d.BFH_SCALEFIT | c4d.BFV_SCALEFIT, c4d.TAB_TABS):
                border_space_pixels = 3
                self.GroupBorderSpace(border_space_pixels, border_space_pixels, border_space_pixels, border_space_pixels)  # 设置边框空间
                self.GroupBorder(c4d.BORDER_BLACK | c4d.BORDER_ACTIVE_1)

                # 创建SHOP组
                if self.GroupBegin(id= self.SCENE_BUILDER_GROUP, flags=c4d.BFH_SCALEFIT | c4d.BFV_SCALEFIT, cols=1, rows=0,
                                   title="场景装配", initw=0, inith=0):
                    # 创建控件
                    self.Kidoo_Scene_Builder_Title()
                    self.Kidoo_Scene_Builder_Set_Scene()
                    # self.Kidoo_Scene_Builder_Camera()
                    # self.Kidoo_Scene_Builder_Asset()

                self.GroupEnd()

                # 创建SHOP组
                if self.GroupBegin(id= self.SHOP_GROUP, flags=c4d.BFH_SCALEFIT | c4d.BFV_SCALEFIT, cols=0, rows=0,
                                   title="镜头", initw=0, inith=0):
                    ...




                self.GroupEnd()
                # 创建Asset组
                if self.GroupBegin(id=self.ASSET_GROUP, flags=c4d.BFH_SCALEFIT | c4d.BFV_SCALEFIT, cols=0, rows=0,
                                   title="资产", initw=0, inith=0):

                    ...


                self.GroupEnd()
            self.GroupEnd()
        self.GroupEnd()

        return True

ferdinand

Hey @Amazing_iKe,

thank you for reaching out to us. With the 2025.3.0 SDK, I just published some new GUI examples, including py-cmd_gui_dynamic_2024, which does exactly what you want to do here.

Without executable code I can only guess (please also keep in mind that we cannot debug full projects for users, for complex issues you should write a boiled down version). But when I look at your code two things stand out to me:

Unlikely my code example, you already flush your layout when it is created as your CreateLayout just calls redrawAllKidooShotCards() which then calls self.LayoutFlushGroup(self.SHOT_LIST_GROUP) but that group has not yet been closed at that point in CreateLayout.
You try to flush a ScrollGroup and not a Group. They are quite similar, but I am not 100% sure that scroll groups support flushing. That would be at least the first thing I would try when I encounter problems. The fix is simple: Just add a normal group there and then in the dynamic content, simple nest a scroll group into it as the root element.
When FOOTAGE_GROUP would be a child of SHOT_LIST_GROUP, that would of course also explain it, but it is actually the other way around FOOTAGE_GROUP is the parent. The insertion pointer might be faulty in your case because due to (1) you flush your SHOT_LIST_GROUP before it has been fully created, and then the insertion pointer might accidently leak into the parent group or so.

Cheers,
Ferdinand

Amazing_iKe

@ferdinand Thank you very much for your response and suggestions.

I’ll make sure to follow best practices and provide a minimal, testable code sample when posting questions in the future. I’ll also give embedding a group a try.

Thanks again for your support!