1 files changed, 298 insertions, 0 deletions
diff --git a/src/crystfelimageview.c b/src/crystfelimageview.c
new file mode 100644
index 00000000..9d3589d0
--- /dev/null
+++ b/src/crystfelimageview.c
@@ -0,0 +1,298 @@
+/*
+ * crystfelimageview.c
+ *
+ * CrystFEL's image viewer widget
+ *
+ * Copyright © 2020 Deutsches Elektronen-Synchrotron DESY,
+ *                  a research centre of the Helmholtz Association.
+ *
+ * Authors:
+ *  2020 Thomas White <taw@physics.org>
+ *
+ * This file is part of CrystFEL.
+ *
+ * CrystFEL is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * CrystFEL 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with CrystFEL.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <gtk/gtk.h>
+#include <glib-object.h>
+
+#include "crystfelimageview.h"
+
+
+static void scroll_interface_init(GtkScrollable *iface)
+{
+}
+
+
+enum
+{
+	CRYSTFELIMAGEVIEW_0,
+	CRYSTFELIMAGEVIEW_VADJ,
+	CRYSTFELIMAGEVIEW_HADJ,
+	CRYSTFELIMAGEVIEW_VPOL,
+	CRYSTFELIMAGEVIEW_HPOL,
+};
+
+
+G_DEFINE_TYPE_WITH_CODE(CrystFELImageView, crystfel_image_view,
+                        GTK_TYPE_DRAWING_AREA,
+                        G_IMPLEMENT_INTERFACE(GTK_TYPE_SCROLLABLE,
+                                              scroll_interface_init))
+
+
+static gint destroy_sig(GtkWidget *window, CrystFELImageView *iv)
+{
+	return FALSE;
+}
+
+
+static gint realise_sig(GtkWidget *window, CrystFELImageView *iv)
+{
+	return FALSE;
+}
+
+
+static gint button_press_sig(GtkWidget *window, GdkEventButton *event,
+                             CrystFELImageView *iv)
+{
+	return FALSE;
+}
+
+
+static gint motion_sig(GtkWidget *window, GdkEventMotion *event,
+                       CrystFELImageView *iv)
+{
+	return FALSE;
+}
+
+
+
+static gint resize_sig(GtkWidget *window, GdkEventConfigure *event,
+                       CrystFELImageView *iv)
+{
+	return FALSE;
+}
+
+
+static gint draw_sig(GtkWidget *window, cairo_t *cr, CrystFELImageView *iv)
+{
+	cairo_set_source_rgb(cr, 1.0, 0.0, 0.0);
+	cairo_paint(cr);
+	return FALSE;
+}
+
+
+static void redraw(CrystFELImageView *iv)
+{
+}
+
+
+static void horizontal_adjust(GtkAdjustment *adj, CrystFELImageView *iv)
+{
+	iv->x_scroll_pos = gtk_adjustment_get_value(adj);
+	redraw(iv);
+}
+
+
+static void set_horizontal_params(CrystFELImageView *iv)
+{
+	if ( iv->hadj == NULL ) return;
+	gtk_adjustment_configure(iv->hadj, iv->x_scroll_pos, 0, iv->w, 100,
+	                         iv->visible_width, iv->visible_width);
+}
+
+
+static void vertical_adjust(GtkAdjustment *adj, CrystFELImageView *iv)
+{
+	iv->y_scroll_pos = gtk_adjustment_get_value(adj);
+	redraw(iv);
+}
+
+
+static void set_vertical_params(CrystFELImageView *iv)
+{
+	if ( iv->vadj == NULL ) return;
+	gtk_adjustment_configure(iv->vadj, iv->y_scroll_pos, 0, iv->w, 100,
+	                         iv->visible_width, iv->visible_width);
+}
+
+
+static void crystfel_image_view_set_property(GObject *obj, guint id, const GValue *val,
+                                             GParamSpec *spec)
+{
+	CrystFELImageView *iv = CRYSTFEL_IMAGE_VIEW(obj);
+
+	switch ( id ) {
+
+		case CRYSTFELIMAGEVIEW_VPOL :
+		iv->vpol = g_value_get_enum(val);
+		break;
+
+		case CRYSTFELIMAGEVIEW_HPOL :
+		iv->hpol = g_value_get_enum(val);
+		break;
+
+		case CRYSTFELIMAGEVIEW_VADJ :
+		iv->vadj = g_value_get_object(val);
+		set_vertical_params(iv);
+		if ( iv->vadj != NULL ) {
+			g_signal_connect(G_OBJECT(iv->vadj), "value-changed",
+			                 G_CALLBACK(vertical_adjust), iv);
+		}
+		break;
+
+		case CRYSTFELIMAGEVIEW_HADJ :
+		iv->hadj = g_value_get_object(val);
+		set_horizontal_params(iv);
+		if ( iv->hadj != NULL ) {
+			g_signal_connect(G_OBJECT(iv->hadj), "value-changed",
+			                 G_CALLBACK(horizontal_adjust), iv);
+		}
+		break;
+
+		default :
+		printf("setting %i\n", id);
+		break;
+
+	}
+}
+
+
+static void crystfel_image_view_get_property(GObject *obj, guint id, GValue *val,
+                                             GParamSpec *spec)
+{
+	CrystFELImageView *iv = CRYSTFEL_IMAGE_VIEW(obj);
+
+	switch ( id ) {
+
+		case CRYSTFELIMAGEVIEW_VADJ :
+		g_value_set_object(val, iv->vadj);
+		break;
+
+		case CRYSTFELIMAGEVIEW_HADJ :
+		g_value_set_object(val, iv->hadj);
+		break;
+
+		case CRYSTFELIMAGEVIEW_VPOL :
+		g_value_set_enum(val, iv->vpol);
+		break;
+
+		case CRYSTFELIMAGEVIEW_HPOL :
+		g_value_set_enum(val, iv->hpol);
+		break;
+
+		default :
+		G_OBJECT_WARN_INVALID_PROPERTY_ID(obj, id, spec);
+		break;
+
+	}
+}
+
+
+static GtkSizeRequestMode get_request_mode(GtkWidget *widget)
+{
+	return GTK_SIZE_REQUEST_CONSTANT_SIZE;
+}
+
+
+static void get_preferred_width(GtkWidget *widget, gint *min, gint *natural)
+{
+	*min = 0;
+	*natural = 640;
+}
+
+
+static void get_preferred_height(GtkWidget *widget, gint *min, gint *natural)
+{
+	*min = 0;
+	*natural = 640;
+}
+
+
+static void crystfel_image_view_class_init(CrystFELImageViewClass *klass)
+{
+	GObjectClass *goc = G_OBJECT_CLASS(klass);
+	goc->set_property = crystfel_image_view_set_property;
+	goc->get_property = crystfel_image_view_get_property;
+	g_object_class_override_property(goc, CRYSTFELIMAGEVIEW_VADJ, "vadjustment");
+	g_object_class_override_property(goc, CRYSTFELIMAGEVIEW_HADJ, "hadjustment");
+	g_object_class_override_property(goc, CRYSTFELIMAGEVIEW_VPOL, "vscroll-policy");
+	g_object_class_override_property(goc, CRYSTFELIMAGEVIEW_HPOL, "hscroll-policy");
+
+	GTK_WIDGET_CLASS(klass)->get_request_mode = get_request_mode;
+	GTK_WIDGET_CLASS(klass)->get_preferred_width = get_preferred_width;
+	GTK_WIDGET_CLASS(klass)->get_preferred_height = get_preferred_height;
+	GTK_WIDGET_CLASS(klass)->get_preferred_height_for_width = NULL;
+}
+
+
+static void crystfel_image_view_init(CrystFELImageView *iv)
+{
+	iv->vpol = GTK_SCROLL_NATURAL;
+	iv->hpol = GTK_SCROLL_NATURAL;
+	iv->vadj = NULL;
+	iv->hadj = NULL;
+}
+
+
+GtkWidget *crystfel_image_view_new()
+{
+	CrystFELImageView *iv;
+
+	iv = g_object_new(CRYSTFEL_TYPE_IMAGE_VIEW, NULL);
+
+	iv->w = 100;
+	iv->h = 100;
+	iv->x_scroll_pos = 0;
+	iv->y_scroll_pos = 0;
+
+	gtk_widget_set_size_request(GTK_WIDGET(iv), iv->w, iv->h);
+
+	g_signal_connect(G_OBJECT(iv), "destroy",
+	                 G_CALLBACK(destroy_sig), iv);
+	g_signal_connect(G_OBJECT(iv), "realize",
+	                 G_CALLBACK(realise_sig), iv);
+	g_signal_connect(G_OBJECT(iv), "button-press-event",
+	                 G_CALLBACK(button_press_sig), iv);
+	g_signal_connect(G_OBJECT(iv), "motion-notify-event",
+	                 G_CALLBACK(motion_sig), iv);
+	g_signal_connect(G_OBJECT(iv), "configure-event",
+	                 G_CALLBACK(resize_sig), iv);
+	g_signal_connect(G_OBJECT(iv), "draw",
+	                 G_CALLBACK(draw_sig), iv);
+
+	gtk_widget_set_can_focus(GTK_WIDGET(iv), TRUE);
+	gtk_widget_add_events(GTK_WIDGET(iv),
+	                      GDK_POINTER_MOTION_HINT_MASK
+	                       | GDK_BUTTON1_MOTION_MASK
+	                       | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK
+	                       | GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK
+	                       | GDK_SCROLL_MASK);
+
+	gtk_widget_grab_focus(GTK_WIDGET(iv));
+
+	gtk_widget_show(GTK_WIDGET(iv));
+
+	return GTK_WIDGET(iv);
+}