/// <summary>
/// Draw the blackboard view.
/// <param name="rect">The position to draw the variables.</param>
/// <param name="blackboard">The blackboard to be drawn.</param>
/// <param name="blackboardHeight">The size needed to show all variables in the blackboard.</param>
/// </summary>
void DrawBlackboardView (Rect rect, InternalBlackboard blackboard, float blackboardHeight) {
// Draw header
Rect headerRect = new Rect (rect.x, rect.y, rect.width, blackboardHeaderHeight);
if (GUI.Button(headerRect, new GUIContent( "Variables [" + blackboard.GetSize().ToString() + "]","Click to expand/collapse"), s_Styles.blackboardHeader)) {
if (Event.current.mousePosition.x >= headerRect.xMax - c_BlackboardHeaderButtonWidth) {
BlackboardGUIUtility.OnAddContextMenu(blackboard);
m_BlackboardViewIsExpanded = true;
}
else
m_BlackboardViewIsExpanded = !m_BlackboardViewIsExpanded;
}
// Draw plus button
headerRect.y += 2f;
headerRect.xMin = headerRect.width - c_BlackboardHeaderButtonWidth;
GUI.Label(headerRect, s_Styles.iconToolbarPlus);
// The blackboard is expanded
if (m_BlackboardViewIsExpanded && rect.height - headerRect.height > 0f) {
rect.yMin += headerRect.height;
// Draw background
if (Event.current.type == EventType.Repaint)
s_Styles.blackboardBox.Draw(rect, false, false, false, false);
// Do scroll bar?
bool doScroll = blackboardHeight > rect.height;
// Scroll bar logic
if (doScroll) {
// Create a gui group
rect.yMin += 2f;
rect.yMax -= 2f;
GUI.BeginGroup(rect);
rect.y = rect.x = 0f;
// Get scroll event
if (Event.current.type == EventType.ScrollWheel) {
m_BlackboardScroll += Event.current.delta.y * 10f;
Event.current.Use();
}
// Update rect
rect.y -= m_BlackboardScroll;
rect.width -= 12f;
}
// Draw variables
BlackboardGUIUtility.DrawVariables(rect, blackboard);
// Draw scroll bar
if (doScroll) {
rect.y += m_BlackboardScroll;
rect.width += 12f;
var scrollPosition = new Rect (rect.x + rect.width - 16f, rect.y, 16f, rect.height);
m_BlackboardScroll = GUI.VerticalScrollbar(scrollPosition, m_BlackboardScroll, rect.height, 0f, blackboardHeight);
GUI.EndGroup();
}
}
}