移动，调整大小以及拖放控件 [英] Move,Resize and Drag and Drop a control

问题描述

我正在使用Windows应用程序，用户应该可以在其中移动，调整大小以及拖放控件(在我的情况下为文本框).


除了不能区分MouseDown和Click事件之外，我对移动和拖放的感觉还不错，因为每次我按下控件上的鼠标按钮时，MouseDown事件都会触发，并且我不能真正使用click事件.有没有一种方法可以区分MouseDown和单击.

第二个:我试图在用户选择对象时突出显示控件，以便突出显示控件或获得控件周围的调整大小矩形，以便用户可以拖动它来调整对象的大小.创建应用程序时要做的事情(我们在窗体上添加控件，然后调整其大小).谁能帮我这个忙.


感谢

解决方案

要区别MouseDown与Click，您可以在以下情况下启动计时器MouseDown被触发.如果您在计时器到期之前得到MouseUp，则单击它，否则它将开始拖放.

例如，可以通过使用OnPaint事件并添加GDI +代码以根据组件状态(拖放活动或非活动状态)绘制突出显示.

eg_Anubhava写道:

用户应该能够移动，调整大小和拖动并放下一个控件(在我的情况下为文本框).设置什么属性. AFAIK您只能水平调整非多行TextBox的大小，因此在实现拖动句柄时需要考虑这一点. :)

Hi,

I am working on a windows application where the user should be able to move,resize and drag and drop a control (a Textbox in my case).


I am pretty much ok with the moving and drag and drop except that I cant differentiate between MouseDown and Click events, because everytime I press the mouse button on the control the MouseDown event fires up and I cant really use the click event. Is there a way that i can differentiate between MouseDown and Single Click.

Second: I am trying to highlight the control when the user selects the objects so that I highlight the control or get that resizing rectangle around the control so that user can drag it to resize the object. Something we do while creating a application (we add a control on the form and then resize it) . Can any one please help me out with this.


Thanks

解决方案

As for differentiating MouseDown from Click, you can start a timer when MouseDown is fired. If you get a MouseUp before the timer expires, then it''s a Click, otherwise it''s starting a drag-and-drop.

Highlighting the control can be done for example by using the OnPaint event and adding GDI+ code to draw your highlighting depending on the component status (drag-and-drop active or inactive).

eg_Anubhava wrote:

user should be able to move,resize and drag and drop a control (a Textbox in my case).

I''ll leave it to others to help you with most of this, but you might find it difficult to resize a TextBox, depending on what properties are set. AFAIK you can only resize a non-multiline TextBox horizontally, so you will need to consider this when implementing your drag-handles. :)

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