7 files changed, 116 insertions, 0 deletions

diff --git a/src/model/selection_info.h b/src/model/selection_info.h
new file mode 100644
index 0000000..970ecec
--- a/dev/null
+++ b/src/model/selection_info.h
@@ -0,0 +1,41 @@
+#ifndef SELECTION_INFO_H
+#define SELECTION_INFO_H
+
+#include "selection_purposes.h"
+#include <stdbool.h>
+
+/*
+ * Vertices in the graph.
+ */
+#define ROWS 83905
+
+typedef struct {
+
+  /*
+   * Selection list.
+   */
+  bool set[ROWS];
+  
+  /*
+   * A selection is being performed.
+   */
+  bool active;
+
+  /*
+   * Indicate if the user is currently defining a selection.
+   */
+  SELECTION_PURPOSES purpose;
+  
+  /*
+   * X coordinate of mouse when selection mode initiated.
+   */
+  int x;
+  
+  /*
+   * Y coordinate of mouse when selection mode initiated.
+   */
+  int y;
+  
+} SELECTION_INFO;
+
+#endif // SELECTION_INFO_H
diff --git a/src/model/selection_info_init.c b/src/model/selection_info_init.c
new file mode 100644
index 0000000..e01b2b8
--- a/dev/null
+++ b/src/model/selection_info_init.c
@@ -0,0 +1,12 @@
+#include "selection_info_init.h"
+
+void
+selection_info_init (SELECTION_INFO* s)
+{
+  s->active = false;
+  s->purpose = SET;
+  s->x = 0;
+  s->y = 0;
+
+  return;
+}
diff --git a/src/model/selection_info_init.h b/src/model/selection_info_init.h
new file mode 100644
index 0000000..8ce56c5
--- a/dev/null
+++ b/src/model/selection_info_init.h
@@ -0,0 +1,8 @@
+#ifndef SELECTION_INFO_INIT_H
+#define SELECTION_INFO_INIT_H
+
+#include "selection_info.h"
+
+void selection_info_init (SELECTION_INFO* s);
+
+#endif // SELECTION_INFO_INIT_H
diff --git a/src/model/selection_purposes.h b/src/model/selection_purposes.h
new file mode 100644
index 0000000..12d6ec7
--- a/dev/null
+++ b/src/model/selection_purposes.h
@@ -0,0 +1,17 @@
+#ifndef SELECTION_PURPOSES_H
+#define SELECTION_PURPOSES_H
+
+typedef enum 
+  { 
+    /*
+     * The selection will define a new set.
+     */
+    SET,
+
+    /*
+     * The selection will define a zoom region.
+     */
+    ZOOM 
+  } SELECTION_PURPOSES;
+
+#endif // SELECTION_PURPOSES_H
diff --git a/src/model/zoom_info.h b/src/model/zoom_info.h
new file mode 100644
index 0000000..0b935c8
--- a/dev/null
+++ b/src/model/zoom_info.h
@@ -0,0 +1,21 @@
+#ifndef ZOOM_INFO_H
+#define ZOOM_INFO_H
+
+#include <stdbool.h>
+
+/*
+ * Maintain information for zooming.
+ */
+typedef struct {
+  /*
+   * A zoomed region has been selection.
+   */
+  bool active;
+  
+  /*
+   * Left, right, bottom and top of zoom region in world coordinates.
+   */
+  double coords[4];
+} ZOOM_INFO;
+
+#endif // ZOOM_INFO_H
diff --git a/src/model/zoom_info_init.c b/src/model/zoom_info_init.c
new file mode 100644
index 0000000..c5a3b1d
--- a/dev/null
+++ b/src/model/zoom_info_init.c
@@ -0,0 +1,9 @@
+#include "zoom_info_init.h"
+
+void
+zoom_info_init (ZOOM_INFO* z)
+{
+  z->active = false;
+
+  return;
+}
diff --git a/src/model/zoom_info_init.h b/src/model/zoom_info_init.h
new file mode 100644
index 0000000..262d408
--- a/dev/null
+++ b/src/model/zoom_info_init.h
@@ -0,0 +1,8 @@
+#ifndef ZOOM_INFO_INIT_H
+#define ZOOM_INFO_INIT_H
+
+#include "zoom_info.h"
+
+void zoom_info_init (ZOOM_INFO* z);
+
+#endif // ZOOM_INFO_INIT_H