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36b6132324
GtkWidgets extend GInitiallyUnowned and are automatically freed when removing from parent widget. We need to add an extra reference, to make sure the object keeps alive as long as the java widget has a reference to it
108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
#include <gtk/gtk.h>
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#include "../defines.h"
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#include "../util.h"
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#include "WrapperWidget.h"
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#include "marshal.h"
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#include "../generated_headers/android_view_SurfaceView.h"
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// TODO: currently this widget class doesn't do anything special, will we ever need it to?
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G_DECLARE_FINAL_TYPE (SurfaceViewWidget, surface_view_widget, SURFACE_VIEW, WIDGET, GtkWidget)
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struct _SurfaceViewWidget
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{
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GtkWidget parent_instance;
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};
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struct _SurfaceViewWidgetClass
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{
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GtkWidgetClass parent_class;
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};
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G_DEFINE_TYPE(SurfaceViewWidget, surface_view_widget, GTK_TYPE_WIDGET)
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static void surface_view_widget_init (SurfaceViewWidget *surface_view_widget)
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{
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}
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// resize signal copied from GtkDrawingArea
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enum {
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RESIZE,
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LAST_SIGNAL
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};
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static guint signals[LAST_SIGNAL] = { 0, };
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static void surface_view_widget_size_allocate(GtkWidget *widget, int width, int height, int baseline)
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{
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g_signal_emit(widget, signals[RESIZE], 0, width, height);
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}
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static void surface_view_widget_class_init(SurfaceViewWidgetClass *class)
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{
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
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// resize signal copied from GtkDrawingArea
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widget_class->size_allocate = surface_view_widget_size_allocate;
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signals[RESIZE] =
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g_signal_new("resize",
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G_TYPE_FROM_CLASS (class),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkDrawingAreaClass, resize),
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NULL, NULL,
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g_cclosure_user_marshal_VOID__INT_INT,
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G_TYPE_NONE, 2, G_TYPE_INT, G_TYPE_INT);
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g_signal_set_va_marshaller(signals[RESIZE],
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G_TYPE_FROM_CLASS (class),
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g_cclosure_user_marshal_VOID__INT_INTv);
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}
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GtkWidget * surface_view_widget_new(void)
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{
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return g_object_new (surface_view_widget_get_type(), NULL);
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}
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// ---
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struct jni_callback_data { JavaVM *jvm; jobject this; jclass this_class;};
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static void on_resize(GtkWidget* self, gint width, gint height, struct jni_callback_data *d)
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{
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JNIEnv *env;
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(*d->jvm)->GetEnv(d->jvm, (void**)&env, JNI_VERSION_1_6);
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// TODO: are there cases where returning RGBA_8888 is a bad idea?
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// NOTE: we want to call the private method of android.view.SurfaceView, not the related method with this name in the API
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(*env)->CallVoidMethod(env, d->this, _METHOD(d->this_class, "surfaceChanged", "(Landroid/view/SurfaceHolder;III)V"),
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_GET_OBJ_FIELD(d->this, "mSurfaceHolder", "Landroid/view/SurfaceHolder;"), 1 /*RGBA_8888*/,
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width, height);
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}
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JNIEXPORT jlong JNICALL Java_android_view_SurfaceView_native_1constructor(JNIEnv *env, jobject this, jobject context, jobject attrs)
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{
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GtkWidget *wrapper = g_object_ref(wrapper_widget_new());
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GtkWidget *dummy = surface_view_widget_new();
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gtk_widget_set_name(dummy, "dummy widget for SurfaceView");
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wrapper_widget_set_child(WRAPPER_WIDGET(wrapper), dummy);
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// TODO: is this correct for all usecases? how do we know when it's not?
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gtk_widget_set_hexpand(wrapper, true);
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gtk_widget_set_vexpand(wrapper, true);
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JavaVM *jvm;
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(*env)->GetJavaVM(env, &jvm);
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struct jni_callback_data *callback_data = malloc(sizeof(struct jni_callback_data));
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callback_data->jvm = jvm;
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callback_data->this = _REF(this);
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callback_data->this_class = _REF((*env)->FindClass(env, "android/view/SurfaceView"));
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g_signal_connect(dummy, "resize", G_CALLBACK(on_resize), callback_data);
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return _INTPTR(dummy);
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}
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