• Delphi:RzPageControl(pagecontrol)实现多标签的动态添加,切换,关闭


    使用RzPageControl来实现多标签页
    使用菜单来打开标签页,通过标签页的caption来判断将标签页是否已经被打开过了.

    1.创建标签页,并判断是否是已经打开过的页面

     

    procedure TFmain.Page1Click(Sender: TObject);
    var
    newpage:TRzTabSheet;
    index:integer;
    begin
    newpage:=nil;
    if not gotopage('第一页',newpage) then
    begin
    index:=findpage('第一页');
    if index=-1 then exit;
    Form1:=TForm.Create(nil);
    Form1.Parent:=Fmain.pagecontrol1.Pages[index];
    Form1.Align:=alclient;
    Form1.BorderStyle:=bsnone;
    Form1.Show;
    end;
    end;

    gotopage函数,跳转到需要显示的那页,不存在的话就创建那一页

    {
    gotopage:跳转到某页
    如果存在这页,跳转后返回true;
    如果不存在,则新建一页,返回false;
    }
    function TFmain.gotopage(scaption:string;newpage:TRzTabSheet):boolean;
    var
    i:integer;
    isExists:Boolean;
    begin
    newpage:=nil;
    isExists:=false;
    if length(scaption)<=0 then exit;
    for i:=0 to pagecontrol1.PageCount-1 do
    begin
    if pagecontrol1.Pages[i].Caption=scaption then
    begin
    pagecontrol1.ActivePage:=pagecontrol1.Pages[i];
    isExists:=true;
    break;
    end;
    end;
    if not isExists then
    begin
    newpage:=TRZTabSheet.Create(pagecontrol1);
    newpage.Caption:=scaption;
    newpage.PageControl:=pagecontrol1;
    pagecontrol1.ActivePage:=newpage;
    end;
    result:=isExists;
    end;

    findpage函数,找到指定caption的那一页,返回那页的index,如果那页不存在,返回-1

    {
    findpage:根据标题查询页,返回index
    参数为页caption
    没有找到返回-1,找到返回index
    }
    function TFmain.findpage(scaption:string):integer;
    var
    i:integer;
    isExists:boolean;
    begin
    isExists:=false;
    for i:=0 to pagecontrol1.PageCount-1 do
    begin
    if pagecontrol1.Pages[i].Caption=scaption then
    begin
    pagecontrol1.ActivePage:=pagecontrol1.Pages[i];
    isExists:=true;
    result:=i;
    break;
    end;
    end;
    if not isExists then result:=-1;
    end;


    2.双击标签,关闭标签页
    RzpageControl的双击事件,如果标题不是’首页’就关闭当前显示的这页

    procedure TFmain.PageControl1DblClick(Sender: TObject);
    begin
    if PageControl1.ActivePage.Caption<>'首页' then
    pagecontrol1.CloseActiveTab;
    end;


    3.通过关闭按钮关闭
    先设置ShowCloseButton属性为true
    然后重写OnClose事件

    procedure TFmain.PageControl1Close(Sender: TObject;
    var AllowClose: Boolean);
    begin //如果只剩下一页不关闭,或当前页是首页不关闭
    if (self.PageControl1.PageCount=1) or (self.PageControl1.ActivePage.Caption='首页') then
    begin
    AllowClose:=False;
    Exit;
    end;
    AllowClose:=True;
    end;

    Delphi中TRzPageControl实现多窗口的融合窗口
    procedure ShowDockForm(FormClass: TFormClass; dockCtrl: TWinControl;
    IsMaxed: Boolean);
    
    procedure ShowCaption(ParentCtrl:TWinControl;ACaption:string);
    begin
       if ParentCtrl is TRzTabSheet then
        TRzTabSheet(ParentCtrl).Caption := ACaption;
    end;
    
    var
    i: Integer;
    TabCtrl:TRzTabSheet;
    Form:TForm;
    begin
    Screen.Cursor := crHourGlass;
    try
       for i := 0 to Screen.CustomFormCount - 1 do
         if Screen.CustomForms[i] is FormClass then
         begin
           if (not (Screen.CustomForms[i]).Visible) then
             (Screen.CustomForms[i]).Visible := True;
           (Screen.CustomForms[i]).BringToFront;
           (Screen.CustomForms[i]).SetFocus;
           TabCtrl := TRzTabSheet(Screen.CustomForms[i].Parent);
           ShowCaption(TabCtrl,Screen.CustomForms[i].Caption);
           TRzPageControl(dockCtrl).ActivePageIndex := TabCtrl.PageIndex;
             exit;
         end;
    
       TabCtrl := TRzTabSheet.Create(dockCtrl);   //dockCtrl
       TabCtrl.PageControl := TRzPageControl(dockCtrl);
       TRzPageControl(dockCtrl).ActivePageIndex := TabCtrl.PageIndex;
    
       Form := FormClass.Create(TabCtrl);
       with Form do
       try
         ManualDock(TabCtrl);
         ShowCaption(TabCtrl,Caption);
    
         Show;
         Form.WindowState := wsMaximized;
         Form.Align := alClient;
       except
         Free;
       end;
      
    finally
       Screen.Cursor := crDefault;
    end;
    end;
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  • 原文地址:https://www.cnblogs.com/westsoft/p/13150165.html
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