分组控件 [英] Grouping Controls

问题描述

我正在使用C ++ Builder5。是否可以对一组完全不同的控件进行分组，以便通过简单地调用 myGroup.Enabled = false; 将所有已启用 的控件组设置为false？我不能使用GroupBox，因为控件（标签，复选框等）位于不同的 TabPages 上。

I'm using C++ Builder 5. Is there a way to group a disparate set of controls so that by simply calling, for instance, myGroup.Enabled = false; will set all group of controls enabled property to false? I can't use a GroupBox since the controls (labels, checkboxes, etc) are on different TabPages.

我问的原因是这样，我不必显式调用每个控件的 enabled 属性，并且可以通过一个简单的调用来实现。

The reason I ask is so I don't have to call each control's enabled property explicitly and can do it with one simple call.

如果没有，我如何创建一个自定义Control类来做到这一点？

If not, how can I create a custom Control class to do this?

推荐答案

您可以使用< a href = http://docs.embarcadero.com/products/rad_studio/delphiAndcpp2009/HelpUpdate2/EN/html/delphivclwin32/_!!MEMBERTYPE_Properties_Classes_TComponent_14_Published_Properties.html rel = nofollow noreferrer>标记属性控制并创建您自己的分组。

You could use the Tag property of the controls and create your own grouping.

void TForm1::SetControlState(TWinControl *WinCtrl, const bool IsEnabled, const int TagValue)
{
 // set the enabled property for each control with matching TagValue
 for (int Index = 0; Index < WinCtrl->ControlCount; ++Index)
 {
   if (WinCtrl->Controls[Index]->Tag == TagValue)
   {
     WinCtrl->Controls[Index]->Enabled = IsEnabled;
   }

   // set child controls
   if (WinCtrl->Controls[Index]->InheritsFrom(__classid(TWinControl)))
   {
     TWinControl *TempWinCtrl;
     TempWinCtrl = static_cast<TWinControl *>(WinCtrl->Controls[Index]);
     SetControlState(TempWinCtrl, IsEnabled, TagValue);
   }
 } // end for
}

如果要一次性启用/禁用所有控件。

Alternatively, If you want to enable/disable all controls in one go.

void TForm1::SetControlState(TWinControl *WinCtrl, const bool IsEnabled)
{
 // set the enabled property for each control with parent TabSheet
 for (int Index = 0; Index < WinCtrl->ControlCount; ++Index)
 {
   WinCtrl->Controls[Index]->Enabled = IsEnabled;

   // disable child controls
   if (WinCtrl->Controls[Index]->InheritsFrom(__classid(TWinControl)))
   {
     TWinControl *TempWinCtrl;
     TempWinCtrl = static_cast<TWinControl *>(WinCtrl->Controls[Index]);
     SetControlState(TempWinCtrl, IsEnabled);
   }
 } // end for
} 

示例：

// disable all controls on the form
SetControlState(Form1, false);

// disable all controls on a tabsheet
SetControlState(TabSheet1, false);

注意：上面的代码已经过C ++ Builder 2007的测试

NOTE: The above code has been tested with C++Builder 2007

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