Delphi 自定义弹出/下拉菜单,如何? [英] Delphi Custom popup/dropdown, how?
问题描述
我想制作一个自定义下拉菜单/弹出菜单,其下方有一个很好的阴影.问题是它不是标准菜单,我需要在弹出/下拉菜单中放置一些组件.所以基本上我想要一个下拉菜单,我可以做任何我想做的事情,而不仅限于简单的菜单项.我希望它像一个普通的弹出菜单问题一样,我从哪里开始.任何解决方案?参考文献?
I want to make a custom dropdow/popup menu with a shadow nicely beneath it. The problem is that it is not a standard menu and I need to put some components on the popup/dropdown. So basically I want a dropdown I can do whatever I want with, not being limited to simple menuitems. I want it to act like a normal popupmenu problem is where do I start. Any solutions? References?
推荐答案
听起来您想要一个看起来像弹出菜单但包含组件的表单.
It sounds like you want a form that looks like a popup menu, but contains components.
如果您有一个具有 OnMouseDown 事件的组件(如本示例中显示的 TPanel),并且您只需弹出包含您想要弹出的控件的第二个表单,那就更容易了:
It is easier if you have a component that has an OnMouseDown event, like the TPanel shown in this sample, and you just pop up a second form which contains the controls you wanted to pop up:
procedure TForm3.JvPanel1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
begin
if Button=mbRight then
FDown := true
else
FDown := false;
end;
procedure TForm3.JvPanel1MouseUp(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
var
pt:TPoint;
begin
if Button=mbRight then begin
FDown := true;
pt.X := jvPanel1.Left;
pt.Y := jvPanel1.Top+jvPanel1.Height;
pt := ClientToScreen(pt);
Form4.Position := poDesigned;
Form4.BorderStyle := bsNone;
Form4.Left := pt.X;
Form4.Top := pt.Y;
Form4.Show;
end;
end;
它处理显示自身的表单,并将自身定位为看起来像一个弹出窗口.第二种形式隐藏自己,也很简单:
That handles the form showing itself, and positioning itself to look like a popup. the second form hiding itself, is easy too:
procedure TForm4.FormDeactivate(Sender: TObject);
begin
Hide;
end;
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