我删除了之前的变体(基于[SO]: How can I detect when Windows 10 enters tablet mode in a Windows Forms application? (@CheeseLover's answer)(@Remko 的评论指出))因为这是一个完全不同的场景(与桌面上运行的 Win 没有任何关系) .
我在[MS.DevBlogs]: Raymond - How can I detect whether my PC is in tablet mode? 上花了一些时间(在@RitaHan-MSFT 的回答 (+1) 中指出),很明显,这就是要走的路。
我不知道如何将代码“翻译”成 Delphi,因为我已经在其中编写了大量代码(但我确信这是可能的)已经过去了很多年,所以我做了下一个最好的事情:编写了一个 C++ .dll(包含 Raymond 代码的修改/改进版本),从 Delphi 调用。
注意:VStudio是构建.dll所必需的,我用的是2015 社区版,它是免费的,可以从[VStudio]: Visual Studio 2015 and other Products 下载(不过你需要一个MS 帐户)。
dll.cpp:
#include <wrl/client.h>
#include <windows.ui.viewmanagement.h>
#include <UIViewSettingsInterop.h>
#include <wrl/wrappers/corewrappers.h>
namespace WRL = Microsoft::WRL;
namespace VM = ABI::Windows::UI::ViewManagement;
class Backend {
public:
static Backend &instance() {
static Backend m_instance;
return m_instance;
}
WRL::ComPtr<IUIViewSettingsInterop> interop() { return m_interop; }
private:
Backend() {
HRESULT res = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);
m_comInit = (res == S_OK) || (res == S_FALSE);
if (m_comInit || (res == RPC_E_CHANGED_MODE)) {
res = Windows::Foundation::GetActivationFactory(WRL::Wrappers::HStringReference(
RuntimeClass_Windows_UI_ViewManagement_UIViewSettings).Get(), &m_interop);
}
}
Backend(const Backend &other) = delete;
Backend &operator =(const Backend &other) = delete;
~Backend() {
if (m_interop) { m_interop.Reset(); }
if (m_comInit) { CoUninitialize(); }
}
bool m_comInit = false;
WRL::ComPtr<IUIViewSettingsInterop> m_interop = nullptr;
};
/*!
Gets Tablet mode value.
\param hwnd Window handle to get the mode for
\returns:
1 - Tablet mode ON
0 - Tablet mode OFF
-X - Error
*/
extern "C" __declspec(dllexport) int GetTabletMode(HWND hwnd) {
WRL::ComPtr<IUIViewSettingsInterop> interop = Backend::instance().interop();
if (!interop) { return -3; }
WRL::ComPtr<VM::IUIViewSettings> viewSettings;
HRESULT res = interop->GetForWindow(hwnd != NULL ? hwnd : GetConsoleWindow(), IID_PPV_ARGS(&viewSettings));
if (!viewSettings) { return -2; }
VM::UserInteractionMode currentMode;
res = viewSettings->get_UserInteractionMode(¤tMode);
int ret = -1;
switch (currentMode) {
case VM::UserInteractionMode_Mouse: ret = 0; break;
case VM::UserInteractionMode_Touch: ret = 1; break;
default: ret = -1;
}
viewSettings.Reset();
return ret;
}
下面是Delphi的相关代码(只有单元,因为其他的很容易制造,这里没有意义)。
Unit0.pas:
unit Unit0;
interface
uses
Forms, Dialogs, Controls, StdCtrls, Classes;
type
TForm0 = class(TForm)
CheckButton: TButton;
procedure CheckButtonClick(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form0: TForm0;
function GetTabletMode(hwnd: THandle): Integer cdecl; external 'TabletUtils.dll';
implementation
{$R *.dfm}
procedure TForm0.CheckButtonClick(Sender: TObject);
var
TabletModeStr: String;
begin
case GetTabletMode(Self.Handle) of
0 : TabletModeStr := 'OFF';
1 : TabletModeStr := 'ON';
else TabletModeStr := 'ERROR';
end;
MessageDlg('Tablet Mode: ' + TabletModeStr, mtInformation, [mbOK], 0);
end;
end.
输出:
[cfati@CFATI-5510-0:e:\Work\Dev\StackOverflow\q056321591]> sopr.bat
*** Set shorter prompt to better fit when pasted in StackOverflow (or other) pages ***
[prompt]> "c:\Install\x86\Microsoft\Visual Studio Community\2015\vc\vcvarsall.bat" x86
[prompt]> dir /b
App0.cfg
App0.dof
App0.dpr
App0.exe
App0.res
dll.cpp
other
Unit0.dcu
Unit0.ddp
Unit0.dfm
Unit0.pas
[prompt]> cl /nologo /DDLL /DNDEBUG /DUSRDLL /D_WINDOWS /MT dll.cpp /link /NOLOGO /DLL /OUT:TabletUtils.dll ole32.lib runtimeobject.lib
dll.cpp
Creating library TabletUtils.lib and object TabletUtils.exp
[prompt]> dir /b
App0.cfg
App0.dof
App0.dpr
App0.exe
App0.res
dll.cpp
dll.obj
other
TabletUtils.dll
TabletUtils.exp
TabletUtils.lib
Unit0.dcu
Unit0.ddp
Unit0.dfm
Unit0.pas
[prompt]> App0.exe
[prompt]>
在下面的屏幕截图中,我运行了应用程序:
- 在我的笔记本电脑 (Win 10) 上使用 桌面模式(右侧)
- 在 Win 10 VM 上使用 平板电脑模式(左侧)。请注意,我必须复制: