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Windows: setup a default handler for ImeSetInputScreenPosFn so IME (Japanese/Chinese) inputs are positioned correctly.

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User need to set io.ImeWindowHandle
This commit is contained in:
ocornut
2015-03-06 21:11:14 +00:00
parent 0ffd99d319
commit e269125c3a
7 changed files with 72 additions and 34 deletions
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65
imgui.cpp
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@ -207,30 +207,7 @@
io.Fonts->AddFontFromFileTTF("myfontfile.ttf", size_in_pixels, io.Fonts->GetGlyphRangesJapanese()); // Load Japanese characters
io.Fonts->GetTexDataAsRGBA32() or GetTexDataAsAlpha8()
If you want to input Japanese/Chinese/Korean in the text input widget:
- when loading the font, pass a range that contains the characters you need, e.g.: io.Fonts->GetGlyphRangesJapanese()
- to have the Microsoft IME cursor appears at the right location in the screen, setup a handler for the io.ImeSetInputScreenPosFn function:
#include <Windows.h>
#include <Imm.h>
static void ImImpl_ImeSetInputScreenPosFn(int x, int y)
{
// Notify OS Input Method Editor of text input position
HWND hwnd = glfwGetWin32Window(window);
if (HIMC himc = ImmGetContext(hwnd))
{
COMPOSITIONFORM cf;
cf.ptCurrentPos.x = x;
cf.ptCurrentPos.y = y;
cf.dwStyle = CFS_FORCE_POSITION;
ImmSetCompositionWindow(himc, &cf);
}
}
// Set pointer to handler in ImGuiIO structure
io.ImeSetInputScreenPosFn = ImImpl_ImeSetInputScreenPosFn;
io.ImeWindowHandle = MY_HWND; // To input using Microsoft IME, give ImGui the hwnd of your application
- tip: the construct 'IMGUI_ONCE_UPON_A_FRAME { ... }' will run the block of code only once a frame. You can use it to quickly add custom UI in the middle of a deep nested inner loop in your code.
- tip: you can create widgets without a Begin()/End() block, they will go in an implicit window called "Debug"
@ -459,6 +436,7 @@ static int ImTextCountUtf8BytesFromWchar(const ImWchar* in_text, const
static const char* GetClipboardTextFn_DefaultImpl();
static void SetClipboardTextFn_DefaultImpl(const char* text);
static void ImeSetInputScreenPosFn_DefaultImpl(int x, int y);
//-----------------------------------------------------------------------------
// Texture Atlas data
@ -562,7 +540,7 @@ ImGuiIO::ImGuiIO()
MemFreeFn = free;
GetClipboardTextFn = GetClipboardTextFn_DefaultImpl; // Platform dependent default implementations
SetClipboardTextFn = SetClipboardTextFn_DefaultImpl;
ImeSetInputScreenPosFn = NULL;
ImeSetInputScreenPosFn = ImeSetInputScreenPosFn_DefaultImpl;
}
// Pass in translated ASCII characters for text input.
@ -8117,11 +8095,13 @@ void ImFont::RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_re
#if defined(_MSC_VER) && !defined(IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCS)
#ifndef _WINDOWS_
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif
// Win32 API clipboard implementation
static const char* GetClipboardTextFn_DefaultImpl()
static const char* GetClipboardTextFn_DefaultImpl()
{
static char* buf_local = NULL;
if (buf_local)
@ -8163,7 +8143,7 @@ static void SetClipboardTextFn_DefaultImpl(const char* text)
#else
// Local ImGui-only clipboard implementation, if user hasn't defined better clipboard handlers
static const char* GetClipboardTextFn_DefaultImpl()
static const char* GetClipboardTextFn_DefaultImpl()
{
return GImGui->PrivateClipboard;
}
@ -8185,6 +8165,37 @@ static void SetClipboardTextFn_DefaultImpl(const char* text)
#endif
#if defined(_MSC_VER) && !defined(IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCS)
#ifndef _WINDOWS_
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif
#include <Imm.h>
#pragma comment(lib, "imm32")
static void ImeSetInputScreenPosFn_DefaultImpl(int x, int y)
{
// Notify OS Input Method Editor of text input position
if (HWND hwnd = (HWND)GImGui->IO.ImeWindowHandle)
if (HIMC himc = ImmGetContext(hwnd))
{
COMPOSITIONFORM cf;
cf.ptCurrentPos.x = x;
cf.ptCurrentPos.y = y;
cf.dwStyle = CFS_FORCE_POSITION;
ImmSetCompositionWindow(himc, &cf);
}
}
#else
static void ImeSetInputScreenPosFn_DefaultImpl(int x, int y)
{
}
#endif
//-----------------------------------------------------------------------------
// HELP
//-----------------------------------------------------------------------------