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;