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Reimplemented Android cursor API support using reflection so it builds with older SDKs

Sam Lantinga 2018-03-16 11:08:53 -07:00
parent e20d4173bf
commit f536fbea71
4 changed files with 78 additions and 68 deletions
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98
android-project/app/src/main/java/org/libsdl/app/SDLActivity.java
View File

@ -77,10 +77,8 @@ public class SDLActivity extends Activity {
protected static boolean mScreenKeyboardShown;
protected static ViewGroup mLayout;
protected static SDLClipboardHandler mClipboardHandler;
//#CURSORIMPLEENTATION
//protected static Hashtable<Integer, PointerIcon> mCursors;
//protected static int mLastCursorID;
//protected static PointerIcon mActiveCursor;
protected static Hashtable<Integer, Object> mCursors;
protected static int mLastCursorID;
// This is what SDL runs in. It invokes SDL_main(), eventually
@ -153,10 +151,8 @@ public class SDLActivity extends Activity {
mTextEdit = null;
mLayout = null;
mClipboardHandler = null;
//#CURSORIMPLEENTATION
//mCursors = new Hashtable<Integer, PointerIcon>();
//mLastCursorID = 0;
//mActiveCursor = null;
mCursors = new Hashtable<Integer, Object>();
mLastCursorID = 0;
mSDLThread = null;
mExitCalledFromJava = false;
mBrokenLibraries = false;
@ -1093,69 +1089,91 @@ public class SDLActivity extends Activity {
/**
* This method is called by SDL using JNI.
*/
/**
* #CURSORIMPLEENTATION
* The cursor implementation requires API 24 or above
*
public static int createCustomCursor(int[] colors, int width, int height, int hotSpotX, int hotSpotY) {
Bitmap bitmap = Bitmap.createBitmap(colors, width, height, Bitmap.Config.ARGB_8888);
++mLastCursorID;
mCursors.put(mLastCursorID, PointerIcon.create(bitmap, hotSpotX, hotSpotY));
// This requires API 24, so use reflection to implement this
try {
Class PointerIconClass = Class.forName("android.view.PointerIcon");
Class[] arg_types = new Class[] { Bitmap.class, float.class, float.class };
Method create = PointerIconClass.getMethod("create", arg_types);
mCursors.put(mLastCursorID, create.invoke(null, bitmap, hotSpotX, hotSpotY));
} catch (Exception e) {
return 0;
}
return mLastCursorID;
}
public static void setCustomCursor(int cursorID) {
mActiveCursor = mCursors.get(cursorID);
/**
* This method is called by SDL using JNI.
*/
public static boolean setCustomCursor(int cursorID) {
// This requires API 24, so use reflection to implement this
try {
Class PointerIconClass = Class.forName("android.view.PointerIcon");
Method setPointerIcon = SDLSurface.class.getMethod("setPointerIcon", PointerIconClass);
setPointerIcon.invoke(mSurface, mCursors.get(cursorID));
} catch (Exception e) {
return false;
}
return true;
}
public static void setSystemCursor(int cursorID) {
/**
* This method is called by SDL using JNI.
*/
public static boolean setSystemCursor(int cursorID) {
int cursor_type = 0; //PointerIcon.TYPE_NULL;
switch (cursorID) {
case SDL_SYSTEM_CURSOR_NONE:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_NULL);
break;
case SDL_SYSTEM_CURSOR_ARROW:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_ARROW);
cursor_type = 1000; //PointerIcon.TYPE_ARROW;
break;
case SDL_SYSTEM_CURSOR_IBEAM:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_TEXT);
cursor_type = 1008; //PointerIcon.TYPE_TEXT;
break;
case SDL_SYSTEM_CURSOR_WAIT:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_WAIT);
cursor_type = 1004; //PointerIcon.TYPE_WAIT;
break;
case SDL_SYSTEM_CURSOR_CROSSHAIR:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_CROSSHAIR);
cursor_type = 1007; //PointerIcon.TYPE_CROSSHAIR;
break;
case SDL_SYSTEM_CURSOR_WAITARROW:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_WAIT);
cursor_type = 1004; //PointerIcon.TYPE_WAIT;
break;
case SDL_SYSTEM_CURSOR_SIZENWSE:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_TOP_LEFT_DIAGONAL_DOUBLE_ARROW);
cursor_type = 1017; //PointerIcon.TYPE_TOP_LEFT_DIAGONAL_DOUBLE_ARROW;
break;
case SDL_SYSTEM_CURSOR_SIZENESW:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_TOP_RIGHT_DIAGONAL_DOUBLE_ARROW);
cursor_type = 1016; //PointerIcon.TYPE_TOP_RIGHT_DIAGONAL_DOUBLE_ARROW;
break;
case SDL_SYSTEM_CURSOR_SIZEWE:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_HORIZONTAL_DOUBLE_ARROW);
cursor_type = 1014; //PointerIcon.TYPE_HORIZONTAL_DOUBLE_ARROW;
break;
case SDL_SYSTEM_CURSOR_SIZENS:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_VERTICAL_DOUBLE_ARROW);
cursor_type = 1015; //PointerIcon.TYPE_VERTICAL_DOUBLE_ARROW;
break;
case SDL_SYSTEM_CURSOR_SIZEALL:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_GRAB);
cursor_type = 1020; //PointerIcon.TYPE_GRAB;
break;
case SDL_SYSTEM_CURSOR_NO:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_NO_DROP);
cursor_type = 1012; //PointerIcon.TYPE_NO_DROP;
break;
case SDL_SYSTEM_CURSOR_HAND:
mActiveCursor = PointerIcon.getSystemIcon(SDL.getContext(), PointerIcon.TYPE_HAND);
cursor_type = 1002; //PointerIcon.TYPE_HAND;
break;
}
// This requires API 24, so use reflection to implement this
try {
Class PointerIconClass = Class.forName("android.view.PointerIcon");
Class[] arg_types = new Class[] { Context.class, int.class };
Method getSystemIcon = PointerIconClass.getMethod("getSystemIcon", arg_types);
Method setPointerIcon = SDLSurface.class.getMethod("setPointerIcon", PointerIconClass);
setPointerIcon.invoke(mSurface, getSystemIcon.invoke(null, SDL.getContext(), cursor_type));
} catch (Exception e) {
return false;
}
return true;
}
public static PointerIcon getCursor() {
return mActiveCursor;
}
*/
}
/**
@ -1547,14 +1565,6 @@ class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,
event.values[2] / SensorManager.GRAVITY_EARTH);
}
}
/**
* #CURSORIMPLEENTATION
@Override
public PointerIcon onResolvePointerIcon(MotionEvent event, int pointerIndex) {
return SDLActivity.getCursor();
}
*/
}
/* This is a fake invisible editor view that receives the input and defines the

32
src/core/android/SDL_android.c
View File

@ -335,17 +335,16 @@ JNIEXPORT void JNICALL SDL_JAVA_INTERFACE(nativeSetupJNI)(JNIEnv* mEnv, jclass c
"getManifestEnvironmentVariables", "()Z");
midGetDisplayDPI = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, "getDisplayDPI", "()Landroid/util/DisplayMetrics;");
/* Custom cursor implementation is only available on API 24 and above */
midCreateCustomCursor = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, "createCustomCursor", "([IIIII)I");
midSetCustomCursor = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, "setCustomCursor", "(I)V");
midSetSystemCursor = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, "setSystemCursor", "(I)V");
midSetCustomCursor = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, "setCustomCursor", "(I)Z");
midSetSystemCursor = (*mEnv)->GetStaticMethodID(mEnv, mActivityClass, "setSystemCursor", "(I)Z");
if (!midGetNativeSurface ||
!midSetActivityTitle || !midSetWindowStyle || !midSetOrientation || !midGetContext || !midIsAndroidTV || !midInputGetInputDeviceIds ||
!midSendMessage || !midShowTextInput || !midIsScreenKeyboardShown ||
!midClipboardSetText || !midClipboardGetText || !midClipboardHasText ||
!midOpenAPKExpansionInputStream || !midGetManifestEnvironmentVariables|| !midGetDisplayDPI) {
!midOpenAPKExpansionInputStream || !midGetManifestEnvironmentVariables || !midGetDisplayDPI ||
!midCreateCustomCursor || !midSetCustomCursor || !midSetSystemCursor) {
__android_log_print(ANDROID_LOG_WARN, "SDL", "Missing some Java callbacks, do you have the latest version of SDLActivity.java?");
}
@ -2178,34 +2177,29 @@ int Android_JNI_CreateCustomCursor(SDL_Surface *surface, int hot_x, int hot_y)
{
JNIEnv *mEnv = Android_JNI_GetEnv();
int custom_cursor = 0;
if (midCreateCustomCursor) {
jintArray pixels;
pixels = (*mEnv)->NewIntArray(mEnv, surface->w * surface->h);
if (!pixels) {
return 0;
}
jintArray pixels;
pixels = (*mEnv)->NewIntArray(mEnv, surface->w * surface->h);
if (pixels) {
(*mEnv)->SetIntArrayRegion(mEnv, pixels, 0, surface->w * surface->h, (int *)surface->pixels);
custom_cursor = (*mEnv)->CallStaticIntMethod(mEnv, mActivityClass, midCreateCustomCursor, pixels, surface->w, surface->h, hot_x, hot_y);
(*mEnv)->DeleteLocalRef(mEnv, pixels);
} else {
SDL_OutOfMemory();
}
return custom_cursor;
}
void Android_JNI_SetCustomCursor(int cursorID)
SDL_bool Android_JNI_SetCustomCursor(int cursorID)
{
JNIEnv *mEnv = Android_JNI_GetEnv();
if (midSetCustomCursor) {
(*mEnv)->CallStaticVoidMethod(mEnv, mActivityClass, midSetCustomCursor, cursorID);
}
return (*mEnv)->CallStaticBooleanMethod(mEnv, mActivityClass, midSetCustomCursor, cursorID);
}
void Android_JNI_SetSystemCursor(int cursorID)
SDL_bool Android_JNI_SetSystemCursor(int cursorID)
{
JNIEnv *mEnv = Android_JNI_GetEnv();
if (midSetSystemCursor) {
(*mEnv)->CallStaticVoidMethod(mEnv, mActivityClass, midSetSystemCursor, cursorID);
}
return (*mEnv)->CallStaticBooleanMethod(mEnv, mActivityClass, midSetSystemCursor, cursorID);
}
#endif /* __ANDROID__ */

4
src/core/android/SDL_android.h
View File

@ -104,8 +104,8 @@ int Android_JNI_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *bu
/* Cursor support */
int Android_JNI_CreateCustomCursor(SDL_Surface *surface, int hot_x, int hot_y);
void Android_JNI_SetCustomCursor(int cursorID);
void Android_JNI_SetSystemCursor(int cursorID);
SDL_bool Android_JNI_SetCustomCursor(int cursorID);
SDL_bool Android_JNI_SetSystemCursor(int cursorID);
/* Ends C function definitions when using C++ */
#ifdef __cplusplus

12
src/video/android/SDL_androidmouse.c
View File

@ -121,12 +121,18 @@ Android_ShowCursor(SDL_Cursor * cursor)
if (cursor) {
SDL_AndroidCursorData *data = (SDL_AndroidCursorData*)cursor->driverdata;
if (data->custom_cursor) {
Android_JNI_SetCustomCursor(data->custom_cursor);
if (!Android_JNI_SetCustomCursor(data->custom_cursor)) {
return SDL_Unsupported();
}
} else {
Android_JNI_SetSystemCursor(data->system_cursor);
if (!Android_JNI_SetSystemCursor(data->system_cursor)) {
return SDL_Unsupported();
}
}
} else {
Android_JNI_SetSystemCursor(-1);
if (!Android_JNI_SetSystemCursor(-1)) {
return SDL_Unsupported();
}
}
return 0;
}