界面库

优化树控件

designer/tslvcldesigner.tsf

@@ -1768,6 +1768,7 @@ type TVclDesigner = class(tvcform)
         @explan(说明) 设置当前类使用的函数名称 %%
     **}
         FFunctionSelecter.clean();
+        FFunctionSelecter.additem("(none)");
         for i,vi in v do 
         begin
             if vi in array("create","destroy","recycling","loadfromtfm") then continue;
@@ -7480,7 +7481,14 @@ type TBitmapGrid = class(TGridList)
     end 
 end 
 
+type tnone = class()
+    function create();
+    begin
+        name := "(none)";    
+    end 
+    name;
 
+end 
 type TListVariableFilter = class(TListVariable)
     private
     FVlist;
@@ -7547,7 +7555,7 @@ type TListVariableFilter = class(TListVariable)
                 vs[length(vs)] := vi;
             end 
         end 
-        additems(vs);
+        additems(array(new tnone()) union vs);
     end 
     function create(AOwner);override;
     begin
@@ -7633,7 +7641,7 @@ type TListVariable = class(TGridList)
     begin
         id := e.iitem;
         inherited;
-        if id<0 then 
+        if id<0 or (SelectedValue is class(tnone)) or (SelectedValue = "(none)") then 
         begin
             UnSelected();
         end 

funcext/tvclib/utslvcltree.tsf

@@ -305,6 +305,7 @@ type TcustomTreeCtlNode = class(TVirtualListItem)
     function Create(AOwner);override;
     begin
         inherited;
+        FVisible := true;
         FMouseCanChecked := true;
         FModifyChildrenChecked := true;
         FFocusColor := array(rgb(230,240,250),rgb(0,192,250));
@@ -509,7 +510,12 @@ type TcustomTreeCtlNode = class(TVirtualListItem)
         @return(TcustomTreeCtlNode) %%
         **}
         if FItems.Count<1 or not(FExpanded)then return self;
-        it := FItems[FItems.Count-1];
+        for i := FItems.Count-1 downto 0 do 
+        begin
+            it := FItems[i];
+            if it.Visible then return it.GetLastShowNode();
+        end 
+        return self;        
         return it.GetLastShowNode();
     end
     function InsertNodes(its,idx);virtual;
@@ -683,9 +689,12 @@ type TcustomTreeCtlNode = class(TVirtualListItem)
         for i := 0 to FItems.Count-1 do
         begin
             it := FItems[i];
+            if it.Visible then //可见
+            begin 
             r++;
             if it.ItemCount and it.Expanded then r += it.GetShowItemCount();
             end 
+        end
         return r;
     end
     function GetShowNodes();
@@ -698,9 +707,12 @@ type TcustomTreeCtlNode = class(TVirtualListItem)
         for i := 0 to FItems.Count-1 do
         begin
             it := FItems[i];
+            if it.Visible then 
+            begin 
             lst union=array(it);
             if it.ItemCount and it.Expanded then lst union=it.GetShowNodes();
             end 
+        end
         return lst;
     end
     function toarray();virtual;
@@ -730,6 +742,7 @@ type TcustomTreeCtlNode = class(TVirtualListItem)
     property ImgId read FImgId write SetImgId;
     property SelImgId read FSelImgId write SetSelImgId;
     property ExpandImgId read FExpandImgId write SetExpandImgId;
+    property Visible read FVisible write SetVisible;
     property ItemCount read GetItemCount; //½ÚµãÊý
     property Hierarchy Read FHierarchy; //²ã´Î
     property Expanded read GetExpanded; //Õ¹¿ª 
@@ -825,6 +838,55 @@ type TcustomTreeCtlNode = class(TVirtualListItem)
             FSelImgId := id;
         end
     end
+    function SetVisible(v); //可见设置
+    begin
+        if Owner.RootNode = self then return ;
+        nv := v?true:false;
+        if nv<>FVisible then 
+        begin
+            FVisible := nv;
+            p := Parent;
+            if not p then return ; //无父节点
+            if p<>Owner.RootNode then //非根节点
+            begin 
+                if not Owner.NodeInList(p) then return 0;// 不在列表中
+                if not p.Expanded then return 0; //非展开  
+                pidx := Owner.GetItemIndex(p); //获得位置
+            end  else   //根节点
+            begin
+                pidx := -1;
+            end        
+            UnExpand(); //折叠           
+            if nv then //变得可见
+            begin 
+                cidx := p.GetShowNodeidx(self);
+                idx := pidx+cidx+1;  
+                Owner.InsertItem(self(true),idx);
+            end else //变得不可见
+            begin
+                idx := Owner.GetItemIndex(self);
+                owner.DeleteItemByBounds(idx,idx);
+            end            
+        end 
+    end 
+    function GetShowNodeidx(nd); //获得子节点在父节点后面的序号
+    begin
+        idx := 0;
+        for i := 0 to FItems.Count-1 do
+        begin
+            it := FItems[i];
+            
+            if it = nd then return idx;            
+            if it.Visible then 
+            begin 
+                idx++;
+                if it.ItemCount and it.Expanded then
+                    idx += it.GetShowNodeidx(0);
+            end         
+        end
+        return idx;
+    end
+    FVisible;
     FDirtype;
     FImgId;
     FMouseCanChecked;