Android: Separating keyboard stuff into a new file

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12800 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 280 insertions, 0 deletions

diff --git a/src/drivers/Android/Fl_Android_Screen_Keyboard.cxx b/src/drivers/Android/Fl_Android_Screen_Keyboard.cxx
new file mode 100644
index 000000000..341f48238
--- /dev/null
+++ b/src/drivers/Android/Fl_Android_Screen_Keyboard.cxx
@@ -0,0 +1,280 @@
+//
+// "$Id$"
+//
+// Android screen interface for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2018 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     http://www.fltk.org/COPYING.php
+//
+// Please report all bugs and problems on the following page:
+//
+//     http://www.fltk.org/str.php
+//
+
+
+#include "../../config_lib.h"
+#include "Fl_Android_Screen_Driver.H"
+#include "Fl_Android_Application.H"
+#include "Fl_Android_Graphics_Font.H"
+#include <FL/Fl.H>
+#include <FL/platform.H>
+#include <FL/Fl_Graphics_Driver.H>
+#include <FL/Fl_RGB_Image.H>
+#include <FL/fl_ask.H>
+#include <stdio.h>
+#include <errno.h>
+#include <math.h>
+
+
+
+
+int Fl_Android_Screen_Driver::compose(int &del)
+{
+  del = 0;
+  return 1;
+}
+
+
+int Fl_Android_Screen_Driver::handle_keyboard_event(AInputQueue *queue, AInputEvent *event)
+{
+/*
+int32_t 	AKeyEvent_getAction (const AInputEvent *key_event)
+ { AKEY_EVENT_ACTION_DOWN = 0, AKEY_EVENT_ACTION_UP = 1, AKEY_EVENT_ACTION_MULTIPLE = 2 }
+> Reading up on ACTION_MULTIPLE also explains how to deal with
+> special or sequences of characters:
+> "If the key code is not KEYCODE_UNKNOWN then the getRepeatCount()
+> method returns the number of times the given key code should be
+> executed. Otherwise, if the key code is KEYCODE_UNKNOWN, then this
+> is a sequence of characters as returned by getCharacters()."
+
+int32_t 	AKeyEvent_getFlags (const AInputEvent *key_event)
+ {
+  AKEY_EVENT_FLAG_WOKE_HERE = 0x1, AKEY_EVENT_FLAG_SOFT_KEYBOARD = 0x2, AKEY_EVENT_FLAG_KEEP_TOUCH_MODE = 0x4, AKEY_EVENT_FLAG_FROM_SYSTEM = 0x8,
+  AKEY_EVENT_FLAG_EDITOR_ACTION = 0x10, AKEY_EVENT_FLAG_CANCELED = 0x20, AKEY_EVENT_FLAG_VIRTUAL_HARD_KEY = 0x40, AKEY_EVENT_FLAG_LONG_PRESS = 0x80,
+  AKEY_EVENT_FLAG_CANCELED_LONG_PRESS = 0x100, AKEY_EVENT_FLAG_TRACKING = 0x200, AKEY_EVENT_FLAG_FALLBACK = 0x400
+}
+
+int32_t 	AKeyEvent_getKeyCode (const AInputEvent *key_event)
+ {
+  AKEYCODE_UNKNOWN = 0, AKEYCODE_SOFT_LEFT = 1, AKEYCODE_SOFT_RIGHT = 2, AKEYCODE_HOME = 3,
+  AKEYCODE_BACK = 4, AKEYCODE_CALL = 5, AKEYCODE_ENDCALL = 6, AKEYCODE_0 = 7,
+  AKEYCODE_1 = 8, AKEYCODE_2 = 9, AKEYCODE_3 = 10, AKEYCODE_4 = 11,
+  AKEYCODE_5 = 12, AKEYCODE_6 = 13, AKEYCODE_7 = 14, AKEYCODE_8 = 15,
+  AKEYCODE_9 = 16, AKEYCODE_STAR = 17, AKEYCODE_POUND = 18, AKEYCODE_DPAD_UP = 19,
+  AKEYCODE_DPAD_DOWN = 20, AKEYCODE_DPAD_LEFT = 21, AKEYCODE_DPAD_RIGHT = 22, AKEYCODE_DPAD_CENTER = 23,
+  AKEYCODE_VOLUME_UP = 24, AKEYCODE_VOLUME_DOWN = 25, AKEYCODE_POWER = 26, AKEYCODE_CAMERA = 27,
+  AKEYCODE_CLEAR = 28, AKEYCODE_A = 29, AKEYCODE_B = 30, AKEYCODE_C = 31,
+  AKEYCODE_D = 32, AKEYCODE_E = 33, AKEYCODE_F = 34, AKEYCODE_G = 35, ...
+
+int32_t 	AKeyEvent_getScanCode (const AInputEvent *key_event)
+  { AKEY_STATE_UNKNOWN = -1, AKEY_STATE_UP = 0, AKEY_STATE_DOWN = 1, AKEY_STATE_VIRTUAL = 2 }
+
+int32_t 	AKeyEvent_getMetaState (const AInputEvent *key_event)
+ {
+  AMETA_NONE = 0, AMETA_ALT_ON = 0x02, AMETA_ALT_LEFT_ON = 0x10, AMETA_ALT_RIGHT_ON = 0x20,
+  AMETA_SHIFT_ON = 0x01, AMETA_SHIFT_LEFT_ON = 0x40, AMETA_SHIFT_RIGHT_ON = 0x80, AMETA_SYM_ON = 0x04,
+  AMETA_FUNCTION_ON = 0x08, AMETA_CTRL_ON = 0x1000, AMETA_CTRL_LEFT_ON = 0x2000, AMETA_CTRL_RIGHT_ON = 0x4000,
+  AMETA_META_ON = 0x10000, AMETA_META_LEFT_ON = 0x20000, AMETA_META_RIGHT_ON = 0x40000, AMETA_CAPS_LOCK_ON = 0x100000,
+  AMETA_NUM_LOCK_ON = 0x200000, AMETA_SCROLL_LOCK_ON = 0x400000
+}
+
+int32_t 	AKeyEvent_getRepeatCount (const AInputEvent *key_event)
+int64_t 	AKeyEvent_getDownTime (const AInputEvent *key_event)
+int64_t 	AKeyEvent_getEventTime (const AInputEvent *key_event)
+*/
+  Fl_Android_Application::log_i("Key event: action=%d keyCode=%d metaState=0x%x scanCode=%d",
+                                AKeyEvent_getAction(event),
+                                AKeyEvent_getKeyCode(event),
+                                AKeyEvent_getMetaState(event),
+                                AKeyEvent_getScanCode(event));
+
+  auto keyAction = AKeyEvent_getAction(event);
+  if (keyAction==AKEY_EVENT_ACTION_MULTIPLE) {
+    if (AKeyEvent_getKeyCode(event)==AKEYCODE_UNKNOWN) {
+      // characters are in getCharacters()
+      // String class KeyEvent::getCharacters() [Java]
+      // is there a way to get the true Java event somehow?
+      // override dispatchKeyEvent(android.view.KeyEvent event)
+    } else {
+      // send keycode as many times as getRepeatCount() / AKeyEvent_getRepeatCount(event)
+    }
+  }
+
+  JavaVM *javaVM = Fl_Android_Application::get_activity()->vm;
+  JNIEnv *jniEnv = Fl_Android_Application::get_activity()->env;
+
+  JavaVMAttachArgs Args = { JNI_VERSION_1_6, "NativeThread", NULL };
+  jint result = javaVM->AttachCurrentThread(&jniEnv, &Args);
+  if (result == JNI_ERR) return 0;
+
+  jclass class_key_event = jniEnv->FindClass("android/view/KeyEvent");
+  jmethodID eventConstructor = jniEnv->GetMethodID(class_key_event, "<init>",
+                                                   "(JJIIIIIIII)V");
+  jobject eventObj = jniEnv->NewObject(class_key_event, eventConstructor,
+                                       AKeyEvent_getDownTime(event),
+                                       AKeyEvent_getEventTime(event),
+                                       AKeyEvent_getAction(event),
+                                       AKeyEvent_getKeyCode(event),
+                                       AKeyEvent_getRepeatCount(event),
+                                       AKeyEvent_getMetaState(event),
+                                       AInputEvent_getDeviceId(event),
+                                       AKeyEvent_getScanCode(event),
+                                       AKeyEvent_getFlags(event),
+                                       AInputEvent_getSource(event));
+
+  jmethodID method_get_unicode_char = jniEnv->GetMethodID(class_key_event,
+                                                          "getUnicodeChar",
+                                                          "(I)I");
+  int unicodeKey = jniEnv->CallIntMethod(eventObj, method_get_unicode_char,
+                                         AKeyEvent_getMetaState(event));
+
+  jniEnv->DeleteLocalRef(class_key_event);
+  jniEnv->DeleteLocalRef(eventObj);
+
+  javaVM->DetachCurrentThread();
+
+  static char buf[8];
+  int len = fl_utf8encode(unicodeKey, buf);
+  if (len >= 0 && len < 8)
+    buf[len] = 0;
+  else
+    buf[0] = 0;
+  Fl_Android_Application::log_i("Unicode: %d Text: %s", unicodeKey, buf);
+
+  AInputQueue_finishEvent(queue, event, 0);
+
+  Fl_Widget *w = Fl::focus();
+  if (w) {
+    Fl_Window *win = w->window();
+    if (keyAction==AKEY_EVENT_ACTION_DOWN && unicodeKey>0) {
+      Fl::e_text = buf;
+      Fl::e_length = len;
+      Fl::handle(FL_KEYBOARD, win);
+    }
+  }
+
+  return 0;
+}
+
+
+void Fl_Android_Screen_Driver::request_keyboard()
+{
+  if (pKeyboardCount==0) {
+    /*
+    ANativeActivity_showSoftInput(Fl_Android_Application::get_activity(),
+                                  ANATIVEACTIVITY_SHOW_SOFT_INPUT_IMPLICIT);
+    */
+//    void displayKeyboard(bool pShow)
+//    InputMethodManager imm = ( InputMethodManager )getSystemService( Context.INPUT_METHOD_SERVICE );
+//    imm.showSoftInput( this.getWindow().getDecorView(), InputMethodManager.SHOW_FORCED );
+
+    bool pShow = true;
+    {
+      // Attaches the current thread to the JVM.
+      jint lResult;
+      jint lFlags = 0;
+
+      JavaVM* lJavaVM = Fl_Android_Application::get_activity()->vm;
+      JNIEnv* lJNIEnv = Fl_Android_Application::get_activity()->env;
+
+      JavaVMAttachArgs lJavaVMAttachArgs;
+      lJavaVMAttachArgs.version = JNI_VERSION_1_6;
+      lJavaVMAttachArgs.name = "NativeThread";
+      lJavaVMAttachArgs.group = NULL;
+
+      lResult=lJavaVM->AttachCurrentThread(&lJNIEnv, &lJavaVMAttachArgs);
+      if (lResult == JNI_ERR) {
+        return;
+      }
+
+      // Retrieves NativeActivity.
+      jobject lNativeActivity = Fl_Android_Application::get_activity()->clazz;
+      jclass ClassNativeActivity = lJNIEnv->GetObjectClass(lNativeActivity);
+
+      // Retrieves Context.INPUT_METHOD_SERVICE.
+      jclass ClassContext = lJNIEnv->FindClass("android/content/Context");
+      jfieldID FieldINPUT_METHOD_SERVICE =
+              lJNIEnv->GetStaticFieldID(ClassContext,
+                                        "INPUT_METHOD_SERVICE", "Ljava/lang/String;");
+      jobject INPUT_METHOD_SERVICE =
+              lJNIEnv->GetStaticObjectField(ClassContext,
+                                            FieldINPUT_METHOD_SERVICE);
+//      jniCheck(INPUT_METHOD_SERVICE);
+
+      // Runs getSystemService(Context.INPUT_METHOD_SERVICE).
+      jclass ClassInputMethodManager = lJNIEnv->FindClass(
+              "android/view/inputmethod/InputMethodManager");
+      jmethodID MethodGetSystemService = lJNIEnv->GetMethodID(
+              ClassNativeActivity, "getSystemService",
+              "(Ljava/lang/String;)Ljava/lang/Object;");
+      jobject lInputMethodManager = lJNIEnv->CallObjectMethod(
+              lNativeActivity, MethodGetSystemService,
+              INPUT_METHOD_SERVICE);
+
+      // Runs getWindow().getDecorView().
+      jmethodID MethodGetWindow = lJNIEnv->GetMethodID(
+              ClassNativeActivity, "getWindow",
+              "()Landroid/view/Window;");
+      jobject lWindow = lJNIEnv->CallObjectMethod(lNativeActivity,
+                                                  MethodGetWindow);
+      jclass ClassWindow = lJNIEnv->FindClass(
+              "android/view/Window");
+      jmethodID MethodGetDecorView = lJNIEnv->GetMethodID(
+              ClassWindow, "getDecorView", "()Landroid/view/View;");
+      jobject lDecorView = lJNIEnv->CallObjectMethod(lWindow,
+                                                     MethodGetDecorView);
+
+      if (pShow) {
+        // Runs lInputMethodManager.showSoftInput(...).
+        jmethodID MethodShowSoftInput = lJNIEnv->GetMethodID(
+                ClassInputMethodManager, "showSoftInput",
+                "(Landroid/view/View;I)Z");
+        jboolean lResult = lJNIEnv->CallBooleanMethod(
+                lInputMethodManager, MethodShowSoftInput,
+                lDecorView, lFlags);
+      } else {
+        // Runs lWindow.getViewToken()
+        jclass ClassView = lJNIEnv->FindClass(
+                "android/view/View");
+        jmethodID MethodGetWindowToken = lJNIEnv->GetMethodID(
+                ClassView, "getWindowToken", "()Landroid/os/IBinder;");
+        jobject lBinder = lJNIEnv->CallObjectMethod(lDecorView,
+                                                    MethodGetWindowToken);
+
+        // lInputMethodManager.hideSoftInput(...).
+        jmethodID MethodHideSoftInput = lJNIEnv->GetMethodID(
+                ClassInputMethodManager, "hideSoftInputFromWindow",
+                "(Landroid/os/IBinder;I)Z");
+        jboolean lRes = lJNIEnv->CallBooleanMethod(
+                lInputMethodManager, MethodHideSoftInput,
+                lBinder, lFlags);
+      }
+
+      // Finished with the JVM.
+      lJavaVM->DetachCurrentThread();
+    }
+
+  }
+  pKeyboardCount++;
+}
+
+
+void Fl_Android_Screen_Driver::release_keyboard()
+{
+  pKeyboardCount--;
+  if (pKeyboardCount==0) {
+    ANativeActivity_hideSoftInput(Fl_Android_Application::get_activity(),
+                                  ANATIVEACTIVITY_HIDE_SOFT_INPUT_NOT_ALWAYS);
+  }
+}
+
+
+
+//
+// End of "$Id$".
+//