我试图使ListView的列从右到左显示。这个问题已经被提出并回答了。但问题是关于图标和复选框的。当我使用
这是我实现的函数,结合了上述答案和文章中建议的方法:
但这并没有改变什么。我尝试阻止它们中的任何一个,改变它们的顺序和调用不同的位置,但都没有成功。
现在的问题是,如何使ListView的列从右到左显示,而不需要镜像图形或复选框?
我正在使用Win10 x64和Delphi 2010。
如果您想重现问题,这里是我的Delphi代码:
SetWindowLong
使ListView RTL时,它也会镜像图形和复选框,这是不想要的。我可以使用编辑工具来镜像图形,虽然麻烦但可行,但我不知道如何处理复选框。
我认为它们的原因相同,所以我搜索了一篇关于RTL布局的完整文章Microsoft Docs。在激活每个设备上下文的镜像部分中,它指出了图形问题。建议使用LAYOUT_RTL
和LAYOUT_BITMAPORIENTATIONPRESERVED
标志更改DC的布局样式。这是我实现的函数,结合了上述答案和文章中建议的方法:
const
LAYOUT_RTL = 1;
LAYOUT_BITMAPORIENTATIONPRESERVED = 8;
function GetLayout(DC: HDC): DWORD; stdcall; external 'gdi32.dll';
function SetLayout(DC: HDC; dwLayout: DWORD): DWORD; stdcall; external 'gdi32.dll';
procedure MakeRTL(const Handle: HWND);
var
DC: HDC;
begin
SetWindowLong(Handle, GWL_EXSTYLE,
GetWindowLong(Handle, GWL_EXSTYLE) or WS_EX_LAYOUTRTL);
DC := GetWindowDC(Handle);
if DC <> 0 then
SetLayout(DC, GetLayout(DC) or LAYOUT_RTL or LAYOUT_ORIENTATIONMASK);
InvalidateRect(Handle, nil, True);
end;
但这并没有改变什么。我尝试阻止它们中的任何一个,改变它们的顺序和调用不同的位置,但都没有成功。
现在的问题是,如何使ListView的列从右到左显示,而不需要镜像图形或复选框?
我正在使用Win10 x64和Delphi 2010。
如果您想重现问题,这里是我的Delphi代码:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ComCtrls, ImgList, StdCtrls, CommCtrl, ShellAPI;
type
TForm1 = class(TForm)
ListView1: TListView;
ImageList1: TImageList;
ListView2: TListView;
Button1: TButton;
Label1: TLabel;
procedure FormActivate(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Label1Click(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
const
LAYOUT_RTL = 1;
LAYOUT_BTT = 2;
LAYOUT_VBH = 4;
LAYOUT_ORIENTATIONMASK = LAYOUT_RTL or LAYOUT_BTT or LAYOUT_VBH;
LAYOUT_BITMAPORIENTATIONPRESERVED = 8;
function GetLayout(DC: HDC): DWORD; stdcall; external 'gdi32.dll';
function SetLayout(DC: HDC; dwLayout: DWORD): DWORD; stdcall; external 'gdi32.dll';
procedure MakeRTL(const Handle: HWND);
var
DC: HDC;
begin
SetWindowLong(Handle, GWL_EXSTYLE,
GetWindowLong(Handle, GWL_EXSTYLE) or WS_EX_LAYOUTRTL);
DC := GetWindowDC(Handle);
if DC <> 0 then
SetLayout(DC, GetLayout(DC) or LAYOUT_RTL or LAYOUT_ORIENTATIONMASK);
InvalidateRect(Handle, nil, True);
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
MakeRTL(ListView_GetHeader(ListView1.Handle));
MakeRTL(ListView1.Handle);
end;
procedure TForm1.FormActivate(Sender: TObject);
var
I: Integer;
begin
for I := 0 to ListView1.Items.Count - 1 do
begin
ListView1.Items[I].Checked := True;
ListView2.Items[I].Checked := True;
end;
end;
procedure TForm1.Label1Click(Sender: TObject);
begin
ShellExecute(0, 'open', 'https://icons8.com/icons/set/check', '', '', SW_SHOWNORMAL);
end;
end.
dfm:
object Form1: TForm1
Left = 0
Top = 0
BiDiMode = bdLeftToRight
Caption = 'Form1'
ClientHeight = 169
ClientWidth = 353
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -11
Font.Name = 'Tahoma'
Font.Style = []
OldCreateOrder = False
ParentBiDiMode = False
OnActivate = FormActivate
PixelsPerInch = 96
TextHeight = 13
object Label1: TLabel
Left = 277
Top = 128
Width = 47
Height = 26
Cursor = crHandPoint
Alignment = taCenter
Caption = 'graphics by Icons8'
Font.Charset = DEFAULT_CHARSET
Font.Color = clBlue
Font.Height = -11
Font.Name = 'Tahoma'
Font.Style = [fsUnderline]
ParentFont = False
WordWrap = True
OnClick = Label1Click
end
object ListView1: TListView
Left = 8
Top = 8
Width = 250
Height = 73
Checkboxes = True
Columns = <
item
Caption = 'Cap'
Width = 100
end
item
Caption = 'Sub1'
Width = 100
end>
Items.ItemData = {
03620000000200000000000000FFFFFFFFFFFFFFFF01000000FFFFFFFF000000
00054900740065006D00310005500072006F007000310001000000FFFFFFFFFF
FFFFFF01000000FFFFFFFF00000000054900740065006D00320005500072006F
0070003200FFFFFFFF}
LargeImages = ImageList1
SmallImages = ImageList1
TabOrder = 0
ViewStyle = vsReport
end
object ListView2: TListView
Left = 8
Top = 87
Width = 250
Height = 73
Checkboxes = True
Columns = <
item
Caption = 'Cap'
Width = 100
end
item
Caption = 'Sub1'
Width = 100
end>
Items.ItemData = {
03620000000200000000000000FFFFFFFFFFFFFFFF01000000FFFFFFFF000000
00054900740065006D00310005500072006F007000310001000000FFFFFFFFFF
FFFFFF01000000FFFFFFFF00000000054900740065006D00320005500072006F
0070003200FFFFFFFF}
SmallImages = ImageList1
TabOrder = 1
ViewStyle = vsReport
end
object Button1: TButton
Left = 264
Top = 8
Width = 75
Height = 25
Caption = 'RTL'
TabOrder = 2
OnClick = Button1Click
end
object ImageList1: TImageList
ColorDepth = cd32Bit
DrawingStyle = dsTransparent
Left = 272
Top = 40
Bitmap = {
494C0101020008003C0010001000FFFFFFFF2110FFFFFFFFFFFFFFFF424D3600
0000000000003600000028000000400000001000000001002000000000000010
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end
end