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@@ 582行目: / 582行目: @@
      output.write('"},\n')
   output.write('};\n')
+ </syntaxhighlight>
+<br>
+===== Mozcのウインドウレンダリングのソースコードの変更 =====
+ vi src/renderer/qt/qt_window_manager.cc
+<br>
+ <syntaxhighlight lang="c++">
+ # src/renderer/qt/qt_window_manager.ccファイル
+ # 35行目あたり
+ # 編集前
+ #include "absl/strings/str_cat.h"
+ #include "base/logging.h"
+ #include "protocol/candidates.pb.h"
+ #include "renderer/renderer_style_handler.h"
+ #include "renderer/window_util.h"
+ # 編集後
+ #include "absl/strings/str_cat.h"
+ #include "base/logging.h"
+ #include "protocol/candidates.pb.h"
+ #include "renderer/renderer_style_handler.h"
+ #include "renderer/window_util.h"
+ </syntaxhighlight>
+<br>
+ <syntaxhighlight lang="c++">
+ # src/renderer/qt/qt_window_manager.ccファイル
+ # 344行目あたり
+ # 追加
+ struct VirtualRect {
+    const QScreen* screen;
+    const Rect rect;
+    VirtualRect(const QScreen* screen, const Rect rect): screen(screen), rect(rect) {}
+ };
+ Rect TranslateToVirtualRectWithScreen(const QScreen *screen, const Rect& native_rect) {
+    const double device_pixel_ratio = screen->devicePixelRatio();
+    // screen_left, screen_top have the save value in both virtual and native coordinate
+    const int screen_left = screen->geometry().x();
+    const int screen_top = screen->geometry().y();
+    const int vx = (native_rect.Left() - screen_left) / device_pixel_ratio + screen_left;
+    const int vy = (native_rect.Top() - screen_top) / device_pixel_ratio + screen_top;
+    return Rect(vx, vy, native_rect.Width() / device_pixel_ratio, native_rect.Height() / device_pixel_ratio);
+ }
+ VirtualRect TranslateToVirtualRect(const Rect& native_rect) {
+    for (const QScreen *screen: QGuiApplication::screens()) {
+       Rect rect = TranslateToVirtualRectWithScreen(screen, native_rect);
+       const QRect screen_rect = screen->geometry();
+       // Use (top left) to locate a screen
+       if (screen_rect.contains(rect.Left(), rect.Top())) {
+          return VirtualRect(screen, rect);
+       }
+    }
+    // fall back to primary screen
+    const QScreen *screen = QGuiApplication::primaryScreen();
+    Rect point = TranslateToVirtualRectWithScreen(screen, native_rect);
+    return VirtualRect(screen, point);
+ }
+ </syntaxhighlight>
+<br>
+ <syntaxhighlight lang="c++">
+ # src/renderer/qt/qt_window_manager.ccファイル
+ # 379行目あたり
+ # 編集前
+ Point QtWindowManager::GetWindowPosition(
+    const commands::RendererCommand &command, const Size &win_size) {
+    const Rect preedit_rect = GetRect(command.preedit_rectangle());
+    const Point win_pos = Point(preedit_rect.Left(), preedit_rect.Bottom());
+    const Rect monitor_rect = GetMonitorRect(win_pos.x, win_pos.y);
+    const Point offset_to_column1(kColumn0Width, 0);
+    const Rect adjusted_win_geometry =
+       WindowUtil::GetWindowRectForMainWindowFromTargetPointAndPreedit(
+          win_pos, preedit_rect, win_size, offset_to_column1, monitor_rect,
+          /* vertical */ false);  // Only support horizontal window yet.
+    return adjusted_win_geometry.origin;
+ }
+ # 編集後
+ Point QtWindowManager::GetWindowPosition(
+    const commands::RendererCommand &command, const Size &win_size) {
+    const Rect native_preedit_rect = GetRect(command.preedit_rectangle());
+    const VirtualRect preedit_rect = TranslateToVirtualRect(native_preedit_rect);
+    const Point win_pos = Point(preedit_rect.rect.Left(), preedit_rect.rect.Bottom());
+    const Rect monitor_rect = GetRect(preedit_rect.screen->geometry());
+    const Point offset_to_column1(kColumn0Width, 0);
+    const Rect adjusted_win_geometry =
+       WindowUtil::GetWindowRectForMainWindowFromTargetPointAndPreedit(
+          win_pos, preedit_rect.rect, win_size, offset_to_column1, monitor_rect,
+          /* vertical */ false);  // Only support horizontal window yet.
+    return adjusted_win_geometry.origin;
+ }
   </syntaxhighlight>
 <br>