绘制到tabPage [英] Painting to a tabPage

问题描述

您好，

我正在尝试编写一个程序，只要用户选择特定的tabPage，就需要将fillRectangles绘制到tabPage。我无法弄清楚如何做到这一点，因为我似乎需要以某种方式手动调用tabPage_Paint
事件，但我甚至不确定这是否是我必须要做的。

I am attempting to write a program that will need to paint fillRectangles to a tabPage anytime the user selects a specific tabPage. I am having trouble figuring out how to do this, as it seems like I would need to somehow manually call the tabPage_Paint event, but I'm not even sure if that's what I'd have to do.

本质上，代码应如下所示：

In essence, the code should look like this:

private: System::Void TabControl1_SelectedIndexChanged(System::Object^  sender, System::EventArgs^  e)
	{
		if(TabControl1->SelectedTab==tabPage1)
		{
			//Draw a fillRectangle on tabPage1
		}
	}

推荐答案

哇。 ..字面上刚刚意识到该怎么做。

Wow... literally just realized how to do it.

        private: System::Void TabControl1_SelectedIndexChanged(System::Object^  sender, System::EventArgs^  e)
	{
		if(TabControl1->SelectedTab==MapTab)
		{
			System::Void MapTab_Paint(System::Object^  sender, System::Windows::Forms::PaintEventArgs^  e);
		}
	}
	private: System::Void MapTab_Paint(System::Object^  sender, System::Windows::Forms::PaintEventArgs^  e)
	{
		e->Graphics->FillRectangle(Brushes::Red,x,y,30,30);
	}

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