delphi - 如何更改 Delphi 中帮助弹出窗口的位置？

Question

我有下面的代码，现在显示了可用的标准窗口帮助弹出窗口。有谁知道是否有办法定位此窗口出现的位置？例如，让它出现在用户点击的位置？

function HelpPopupWindow(Command: Word; Data: Integer; var CallHelp: Boolean): Boolean;
var
  dwIDs: array[0..3] of DWord;
begin
  dwIDs[0] := Handle;
  dwIDs[1] := Data;
  dwIDs[2] := 0;
  dwIDs[3] := 0;

  HtmlHelp(Handle, PChar('HELP FILE LOCATION HERE::/cshelp.txt'), HH_TP_HELP_CONTEXTMENU, DWORD(@dwIDs[0]));

  CallHelp := False;
end;

干杯

保罗

Answer 1

您应该使用HH_DISPLAY_TEXT_POPUP显示弹出帮助。这通过HH_POPUP为您提供了更大的灵 active 。您通过的结构。使用 pt 字段指定位置:

Specifies (in pixels) where the top center of the pop-up window should be located.

Helpware网站提供了一些示例 Delphi 代码:

{Show HH Popup using a string (StringID) from text file in a CHM
StringID: eg. 99; CHMTextFile: eg. _runDir + 'help.chm::/cshelp.txt'}
function HH_ShowPopupHelp3(aParent: TForm; StringID: Integer; 
  CHMTextFile: String; XYPos: TPoint): HWND;
var hhpopup: HH.THHPopup;
begin
  with hhpopup do
  begin
    cbStruct := sizeof(hhpopup); //sizeof this structure
    hinst := 0; //no used 
    idString := StringID; //topic number in a text file.
    pszText := nil; //no used
    pt := XYPos; //top center of popup
    clrForeground := COLORREF(-1); //use -1 for default - RGB value
    clrBackground := COLORREF(-1); //use -1 for default - RGB value
    rcMargins := Rect(-1,-1,-1,-1);//amount of space between edges
    pszFont := ''; 
  end;
  Result := HtmlHelp(aParent.Handle, PChar(CHMTextFile), 
  HH_DISPLAY_TEXT_POPUP, DWORD(@hhpopup));
end;

事实上，我认为根据代码判断您已经找到了此页面，但只需要进一步阅读该页面即可。