delphi queryCommandState

 

如何 获取当前光标所在的字符属性

 

关键点

function queryCommandState(const cmdID: WideString): WordBool; safecall;

1. 粗体
2. 斜体
3. 下划线
4. 删除线
5. 对齐方式 左 中 右
6. 数字排序
7. 圆的排序
8. 上标
9. 下标

 

function queryCommandValue(const cmdID: WideString): OleVariant; safecall;

1. 字体名称
2. 字符大小

 

实现过程

 

 

function GetFontName():string;

begin

      Result:=(Form1.webbrowser1.Document as IHTMLDocument2).queryCommandValue('FontName');

end;

 

function GetFontSize():string;

begin

    Result:=(Form1.webbrowser1.Document as IHTMLDocument2).queryCommandValue('FontSize');

end;

 

function IsBold():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('Bold');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

 

function IsItalic():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('Italic');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

 

function IsUnderline():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('Underline');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

 

function IsStrikeThrough():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('StrikeThrough');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

 

function IsSubScript():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('SubScript');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

 

function IsSuperScript():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('SuperScript');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

 

function IsJustifyLeft():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('JustifyLeft');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

 

function IsJustifyCenter():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('JustifyCenter');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

 

function IsJustifyRight():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('JustifyRight');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

 

function IsJustifyFull():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('JustifyFull');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

 

function IsInsertOrderedList():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('InsertOrderedList');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

 

function IsInsertUnorderedList():Boolean;

Var  bRtn:Boolean;

begin

    bRtn:= (Form1.webbrowser1.Document as IHTMLDocument2).queryCommandState('InsertUnorderedList');

    if bRtn then

        Result:=True

    else

        Result:=False;

end;

///使用

 

procedure TForm1.WebBrowser1CommandStateChange(ASender: TObject;

  Command: Integer; Enable: WordBool);

Var  bRtn:Boolean;

begin

 

try

  cbb_FontNameList.Text:=GetFontName();

  cbb_FontSize.Text:=GetFontSize();

 

  btn_Bold.Down:=IsBold();

  btn_Italic.Down:=IsItalic();

  btn_Underline.Down:=IsUnderline();

  btn_strikethrough.Down:=IsStrikeThrough();

 

  btn_SubScript.Down:=IsSubScript();

  btn_SuperScript.Down:=IsSuperScript();

 

  ToolButton_AlignTwo.Down:=IsJustifyFull();

  ToolButton_AlignLeft.Down:=IsJustifyLeft();

  ToolButton_AlignCenter.Down:=IsJustifyCenter();

  ToolButton_AlignRight.Down:=IsJustifyRight();

 

  ToolButton_UnoredredList.Down:=IsInsertUnorderedList();

  ToolButton_OrderedList.Down:=IsInsertOrderedList();

  //格式化

except

  Exit;

end;

end;

 

 

   

图

 

备注

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