SimpleSkyCam/gui.cc

/*************************************************************************************** 
 *
 * main.cc is part of SimpleSkyCam.
 * 
 *****************************************************************************************/

#if defined(_WIN32) || defined(_WIN64) || defined(__CYGWIN__)
#else
  #include <unistd.h> /* close() */
#endif
#include <stdio.h>
#include <list>
#include "gui.h"
#include "config.h"
#include "video.h"
#include "filter.h"

extern GtkBuilder *_builder_;			// work around for threads
extern Filter filter;

GtkWidget *temp_da = NULL;
GdkPixbuf *temp_pixbuf = NULL;

GtkWidget *image_da = NULL;
GdkPixbuf *image_pixbuf = NULL;


//////////////////////////////////////////////////////////////////////////////////////////////////
//
// call back functions
//

gboolean cb_window_delete_event (GtkWidget *widget, GdkEvent  *event, gpointer   data) {
	gtk_main_quit();
	return FALSE;
};



void cb_window_show (GtkWidget *widget, gpointer data) {
	GtkWidget *btnstart = GTK_WIDGET(gtk_builder_get_object (GTK_BUILDER(_builder_), "btn-video-rec"));
	GtkWidget *btnstop = GTK_WIDGET(gtk_builder_get_object (GTK_BUILDER(_builder_), "btn-video-stop"));

	printf ("%s:%d %s\n", __FILE__, __LINE__, __FUNCTION__);

	gtk_widget_set_sensitive(btnstart, true);
	gtk_widget_set_sensitive(btnstop, false);

	g_timeout_add(2000, videoctrl_update, NULL);
};


void displayerror (std::string error) {
	GtkWidget *dialog;
	GtkWidget *window = GTK_WIDGET (gtk_builder_get_object (_builder_, "main-window"));
	dialog = gtk_message_dialog_new(GTK_WINDOW(window),
			 GTK_DIALOG_DESTROY_WITH_PARENT,
			 GTK_MESSAGE_ERROR,
			 GTK_BUTTONS_OK,
			 error.c_str());
	gtk_window_set_title(GTK_WINDOW(dialog), "Error");
	gtk_dialog_run(GTK_DIALOG(dialog));
	gtk_widget_destroy(dialog);
};



//
// callback from filter thread. Data will point to the output VideoFrame.
// Access to this data must be Locked before use.
gboolean cb_thread_filterimage (gpointer data) {
	VideoFrame *vf = (VideoFrame *) data;
	int pix_h, pix_w;

	if (image_da == NULL)
		image_da = GTK_WIDGET(gtk_builder_get_object (GTK_BUILDER(_builder_), "image-da"));

	if (vf == NULL) {
		return false;
	}

	filter.LockImageMutex();

	if (image_pixbuf) {
		pix_h = gdk_pixbuf_get_height(image_pixbuf);
		pix_w = gdk_pixbuf_get_width(image_pixbuf);
	}
	else pix_h = 0;

	if (image_pixbuf == NULL || pix_h != vf->h || pix_w != vf->w) {
		if (image_pixbuf != NULL) g_object_unref (image_pixbuf);

		printf ("%s:%d %s New Pixbuf: %d x %d\n", __FILE__, __LINE__, __FUNCTION__, vf->w, vf->h);
		image_pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, false, 8, vf->w, vf->h);
		pix_w = vf->w;
		pix_h = vf->h;
	}
	videoframe_to_pixbuf(image_pixbuf, vf);
	gdk_window_invalidate_rect(gtk_widget_get_window(image_da), NULL, true);

	filter.UnLockImageMutex();

	return false;
};


//
// callback from filter thread. Data will point to the temp VideoFrame.
// this is propabely the object detection
// Access to this data must be Locked before use and pointers must be looked to
gboolean cb_thread_filtertemp (gpointer data) {
	VideoFrame *vf = (VideoFrame *) data;
	int pix_h, pix_w;

	if (temp_da == NULL)
		temp_da = GTK_WIDGET(gtk_builder_get_object (GTK_BUILDER(_builder_), "temp-da"));

	if (vf == NULL) {
		return false;
	}

	filter.LockTempMutex();

	if (temp_pixbuf) {
		pix_h = gdk_pixbuf_get_height(temp_pixbuf);
		pix_w = gdk_pixbuf_get_width(temp_pixbuf);
	}
	else pix_h = 0;

	if (temp_pixbuf == NULL || pix_h != vf->h || pix_w != vf->w) {
		if (temp_pixbuf != NULL) g_object_unref (temp_pixbuf);

		printf ("%s:%d %s New Pixbuf: %d x %d\n", __FILE__, __LINE__, __FUNCTION__, vf->w, vf->h);
		temp_pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, false, 8, vf->w, vf->h);
		pix_w = vf->w;
		pix_h = vf->h;
	}
	videoframe_to_pixbuf(temp_pixbuf, vf);
	gdk_window_invalidate_rect(gtk_widget_get_window(temp_da), NULL, true);

	filter.UnLockTempMutex();

	return false;
};



void cb_imagetempda_draw(GtkWidget *area, cairo_t *cr, int w, int h, gpointer data) {
	int clientw, clienth, pixbufw, pixbufh;
	float clientar, pixbufar;

	GdkPixbuf *pixbuf = NULL;
	GdkPixbuf *src = NULL;

	if (area == temp_da)  		src = temp_pixbuf;
	else if (area == image_da)	src = image_pixbuf;
	else return;

	clienth = gtk_widget_get_allocated_height(area);
	clientw = gtk_widget_get_allocated_width(area);
	clientar = (float)clientw/(float)clienth;
	pixbufh = gdk_pixbuf_get_height(src);
	pixbufw = gdk_pixbuf_get_width(src);
	pixbufar = (float)pixbufw/(float)pixbufh;

	if (pixbufar < clientar) {
		clientw = (pixbufar * (float) clienth);
	}
	else {
		clienth = ((float) clientw / pixbufar);
	}

	pixbuf = gdk_pixbuf_scale_simple (src, clientw, clienth, GDK_INTERP_NEAREST);

    gdk_cairo_set_source_pixbuf(cr, pixbuf, 0, 0);
    cairo_paint(cr);
    cairo_fill (cr);
    g_object_unref (pixbuf);
};