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发现 VCL 样式的一个小故障：当您更新表单标题时，以前在同一过程中重绘的其他控件不会被重绘，并且您被迫调用 Repaint，从而失去了重绘的宝贵处理时间。

示例：（手动设置项目选项/vcl 样式）

unit Unit11;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ExtCtrls;

type
  TForm11 = class(TForm)
    Button1: TButton;
    Panel1: TPanel;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form11: TForm11;

implementation

{$R *.dfm}

procedure TForm11.Button1Click(Sender: TObject);
begin
  Panel1.Caption := 'test';
  caption := 'glitch';
end;

end.

object Form11: TForm11
  Left = 0
  Top = 0
  Caption = 'Form11'
  ClientHeight = 89
  ClientWidth = 352
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object Button1: TButton
    Left = 8
    Top = 8
    Width = 121
    Height = 57
    Caption = 'Button1'
    TabOrder = 0
    OnClick = Button1Click
  end
  object Panel1: TPanel
    Left = 135
    Top = 8
    Width = 185
    Height = 57
    Caption = 'Panel1'
    TabOrder = 1
  end
end

program Project10;

uses
  Vcl.Forms,
  Unit11 in 'Unit11.pas' {Form11},
  Vcl.Themes,
  Vcl.Styles;

{$R *.res}

begin
  Application.Initialize;
  Application.MainFormOnTaskbar := True;
  TStyleManager.TrySetStyle('Cobalt XEMedia');
  Application.CreateForm(TForm11, Form11);
  Application.Run;
end.
4

1 回答 1

2

按顺序设置字幕调用。

  • 首先是 form.caption，然后是 child.caption。

一旦你调用了错误的序列，然后停止工作正确的序列。这就是我在这里使用“设置默认值”按钮的原因。

这个继续，只要没有修复它，我可以忍受。

在此处输入图像描述

procedure TForm11.Button1Click(Sender: TObject);
begin // wrong order
  Panel1.Caption := 'test';
  caption := 'glitch';
end;

procedure TForm11.Button2Click(Sender: TObject);
begin // right order
  caption := 'glitch';
  Panel1.Caption := 'test';
end;

procedure TForm11.Button3Click(Sender: TObject);
var
i:integer;
begin // count no refresh
  for  i:= 1 to 300 do begin
  caption := 'glitch '+intToStr(i);
  Panel1.Caption := 'test '+intToStr(i);
  end;
end;

procedure TForm11.Button4Click(Sender: TObject);
var
i:integer;
begin // count with refresh
  for  i:= 1 to 300 do begin
  caption := 'glitch '+intToStr(i);
  Panel1.Caption := 'test '+intToStr(i);
  Panel1.Refresh;
  end;
end;

procedure TForm11.Button5Click(Sender: TObject);
begin // set default
  caption := 'Form11';
  Panel1.Caption := 'Panel1';
  Panel1.Refresh;
end;

end.

如果你找到了另一个解决方案。请告诉我。

于 2013-02-24T17:41:54.990 回答