我有一个继承自TBaseFrame = class(TFrame)的TFrame
在其中有一个具有相同继承关系的嵌入式TFrame
TViewStandardMovimentoFinanceiro = class(TFrameBase)
ViewStandardEdiMovimentoFinanceiro1: TViewStandardEdiMovimentoFinanceiro;
TViewStandardEdiMovimentoFinanceiro = class(TFrameBase)
TFrameBase = class(TFrame, INaharView, INaharViewAdapter)
创建TViewStandardMovimentoFinanceiro时将父级设置为主要形式(尤其是THorzScrollBox)
在INSIDE的TViewStandardMovimentoFinanceiro框架中,我尝试了使用Children列表的经典方法,但没有发现嵌入的TFrame。
我也尝试过使用“父母的孩子”列表,但没有成功。与组件列表相同
我要做的是找到所有可用的TFrame,以便我可以请求一个接口(我知道该怎么做)
我想念什么?
以下建议如下,我已实现以下代码进行测试:
function TFrameBase.LocateControl(AControl: TControl; ADomainName: string): TControlHandler;
var
NaharView: INaharView;
ControlHandler: TControlHandler;
i: integer;
begin
result := nil;
for i := 0 to AControl.ChildrenCount - 1 do
if (AControl.Children[i] is TFrame) and (AControl.Children[i] <> Self) then
if Supports((AControl.Children[i] as TFrame), INaharView, NaharView) then
begin
ControlHandler := NaharView.Control[ADomainName];
if Assigned(ControlHandler) then
exit(ControlHandler);
end;
end;
function GetUltimateParent(Control: TControl): TControl;
begin
if Control.Parent is TControl then
Result := GetUltimateParent(TControl(Control.Parent))
else
Result := Control;
end;
function TFrameBase.GetNaharControl(ADomainName: string): TControlHandler;
var
i: integer;
ControlHandler: TControlHandler;
begin
if NaharControls.ContainsKey(ADomainName) then
Exit(NaharControls.Items[ADomainName])
else
begin
ControlHandler := LocateControl(GetUltimateParent(Self), ADomainName);
if Assigned(ControlHandler) then
exit(ControlHandler);
end;
raise EViewControlDomainNameNotFound.Create(ADomainName);
end;
执行LocateControl时,它会跳到最上层,并尝试从那里迭代到子级列表上,它仅包含3个项目,并且形式完整,包含控件。
答案 0 :(得分:1)
如Ondrej所述,您的函数LocateControl必须是递归的。像这样
function TFrameBase.LocateControl(AControl: TControl; ADomainName: string): TControlHandler;
var
NaharView: INaharView;
ControlHandler: TControlHandler;
i: integer;
begin
result := nil;
for i := 0 to AControl.ChildrenCount - 1 do
begin
if (AControl.Children[i] is TFrame) and (AControl.Children[i] <> Self) then
begin
if Supports((AControl.Children[i] as TFrame), INaharView, NaharView) then
begin
ControlHandler := NaharView.Control[ADomainName];
if Assigned(ControlHandler) then
begin
exit(ControlHandler);
end;
end;
end;
// recursive bit
Result := LocateControl(AControl.Children[i], ADomainName):
if assigned( Result ) then
begin
exit;
end;
end;
end;