* Fix key code conversion stuff in KeyEvent.

* Add a tooltip class which will later be used to show messages to the users.

Author: PCMan

CMakeLists.txt

@@ -44,6 +44,8 @@ add_library(libIME_static STATIC
     ${PROJECT_SOURCE_DIR}/PropertyPage.h
     ${PROJECT_SOURCE_DIR}/ImeWindow.cpp
     ${PROJECT_SOURCE_DIR}/ImeWindow.h
+    ${PROJECT_SOURCE_DIR}/Tooltip.cpp
+    ${PROJECT_SOURCE_DIR}/Tooltip.h
     ${PROJECT_SOURCE_DIR}/CandidateWindow.h
     ${PROJECT_SOURCE_DIR}/CandidateWindow.cpp
 )

KeyEvent.cpp

@@ -30,11 +30,17 @@ KeyEvent::KeyEvent(UINT type, WPARAM wp, LPARAM lp):
 		::memset(keyStates_, 0, sizeof(keyStates_));
 
 	// try to convert the key event to an ASCII character
+	// ToAscii API tries to convert Ctrl + printable characters to
+	// ASCII 0x00 - 0x31 non-printable escape characters, which we don't want
+	// So here is a hack: pretend that Ctrl key is not pressed
 	WORD result[2] = {0, 0};
+	BYTE ctrlState = keyStates_[VK_CONTROL];
+	keyStates_[VK_CONTROL] = 0;
 	if(::ToAscii(keyCode_, scanCode(), keyStates_, result, 0) == 1)
 		charCode_ = (UINT)result[0];
 	else
 		charCode_ = 0;
+	keyStates_[VK_CONTROL] = ctrlState;
 }
 
 KeyEvent::KeyEvent(const KeyEvent& other):

Tooltip.cpp

@@ -0,0 +1,112 @@
+//
+//	Copyright (C) 2013 Hong Jen Yee (PCMan) <[email protected]>
+//
+//	This library is free software; you can redistribute it and/or
+//	modify it under the terms of the GNU Library General Public
+//	License as published by the Free Software Foundation; either
+//	version 2 of the License, or (at your option) any later version.
+//
+//	This library is distributed in the hope that it will be useful,
+//	but WITHOUT ANY WARRANTY; without even the implied warranty of
+//	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//	Library General Public License for more details.
+//
+//	You should have received a copy of the GNU Library General Public
+//	License along with this library; if not, write to the
+//	Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//	Boston, MA  02110-1301, USA.
+//
+
+#include "Tooltip.h"
+#include "DrawUtils.h"
+
+namespace Ime {
+
+Tooltip::Tooltip(void):
+	autoDestroy_(true),
+	timerId_(0) {
+}
+
+Tooltip::~Tooltip(void) {
+	if(timerId_)
+		KillTimer(hwnd_, timerId_);
+}
+
+LRESULT Tooltip::wndProc(UINT msg, WPARAM wp, LPARAM lp) {
+	switch(msg) {
+	case WM_PAINT: {
+			PAINTSTRUCT ps;
+			BeginPaint(hwnd_, &ps);
+			onPaint(ps);
+			EndPaint(hwnd_, &ps);
+		}
+		break;
+	case WM_TIMER:
+		hideTip();
+		if(autoDestroy_) {
+			::DestroyWindow(hwnd_);
+		}
+		break;
+	case WM_NCDESTROY:
+		if(autoDestroy_) {
+			delete this;
+			return 0;
+		}
+	case WM_MOUSEACTIVATE:
+		return MA_NOACTIVATE;
+	default:
+		return ImeWindow::wndProc(msg, wp, lp);
+	}
+	return 0;
+}
+
+void Tooltip::onPaint(PAINTSTRUCT& ps) {
+	int len = text.length();
+	RECT rc, textrc = {0};
+	GetClientRect(hwnd_, &rc);
+	::FillSolidRect(ps.hdc, &rc, ::GetSysColor(COLOR_INFOBK));
+	Draw3DBorder(ps.hdc, &rc, GetSysColor(COLOR_BTNFACE), GetSysColor(COLOR_3DDKSHADOW), 1);
+
+	SetBkMode(ps.hdc, TRANSPARENT);
+	SetTextColor(ps.hdc, GetSysColor(COLOR_INFOTEXT));
+	HGDIOBJ old_font = SelectObject(ps.hdc, GetStockObject(DEFAULT_GUI_FONT));
+
+	SIZE size;
+	GetTextExtentPoint32W(ps.hdc, text.c_str(), len, &size);
+	rc.top += (rc.bottom - size.cy)/2;
+	rc.left += (rc.right - size.cx)/2;
+	ExtTextOutW(ps.hdc, rc.left, rc.top, 0, &textrc, text.c_str(), len, NULL);
+
+	SelectObject(ps.hdc, old_font);
+}
+
+void Tooltip::showTip(int x, int y, std::wstring tip_text, int duration) {
+	text = tip_text;
+	SIZE size = {0};
+	HDC dc = GetDC(hwnd_);
+	HGDIOBJ old_font = SelectObject(dc, GetStockObject(DEFAULT_GUI_FONT));
+	GetTextExtentPointW(dc, text.c_str(), text.length(), &size);
+	SelectObject(dc, old_font);
+	ReleaseDC(hwnd_, dc);
+
+	SetWindowPos(hwnd_, HWND_TOPMOST, x, y, size.cx + 4, size.cy + 4, SWP_NOACTIVATE);
+	if(IsWindowVisible(hwnd_))
+		InvalidateRect(hwnd_, NULL, TRUE);
+	else
+		ShowWindow(hwnd_, SW_SHOWNA);
+	if(duration > 0) {
+		if(timerId_)
+			KillTimer(hwnd_, timerId_);
+		timerId_ = SetTimer(hwnd_, 1, duration, NULL);
+	}
+}
+
+void Tooltip::hideTip(void) {
+	if(timerId_) {
+		KillTimer(hwnd_, timerId_);
+		timerId_ = 0;
+	}
+	hide();
+}
+
+} // namespace Ime

Tooltip.h

@@ -0,0 +1,53 @@
+//
+//	Copyright (C) 2013 Hong Jen Yee (PCMan) <[email protected]>
+//
+//	This library is free software; you can redistribute it and/or
+//	modify it under the terms of the GNU Library General Public
+//	License as published by the Free Software Foundation; either
+//	version 2 of the License, or (at your option) any later version.
+//
+//	This library is distributed in the hope that it will be useful,
+//	but WITHOUT ANY WARRANTY; without even the implied warranty of
+//	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//	Library General Public License for more details.
+//
+//	You should have received a copy of the GNU Library General Public
+//	License along with this library; if not, write to the
+//	Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+//	Boston, MA  02110-1301, USA.
+//
+
+// FIXME: this class is taken from old ChewingIME and the 
+// interface really needs some redesign. It's not ready for use yet.
+
+#ifndef IME_TOOLTIP_H
+#define IME_TOOLTIP_H
+
+#include "imewindow.h"
+#include <string>
+
+namespace Ime {
+
+class Tooltip :	public ImeWindow {
+public:
+	Tooltip(void);
+	virtual ~Tooltip(void);
+	void showTip(int x, int y, std::wstring tip_text, int duration = 0);
+	void hideTip(void);
+	void setAutoDestroy(bool autoDestroy = true) {
+		autoDestroy_ = autoDestroy;
+	}
+
+protected:
+	LRESULT wndProc(UINT msg, WPARAM wp, LPARAM lp);
+	void onPaint(PAINTSTRUCT& ps);
+
+private:
+	UINT timerId_;
+	std::wstring text;
+	bool autoDestroy_;
+};
+
+}
+
+#endif