protected bool SvgInputAssetsDraw(SVGBasicAtlas atlas, Event currentEvent, out Rect scollRect)
{
bool isDirty = false;
// keep track of drawn rows
if (currentEvent.type != EventType.Layout)
{
this.m_InputAssetsRects = new List <Rect>();
}
Vector2 scrollPos = EditorGUILayout.BeginScrollView(this.m_SvgListScrollPos, GUILayout.ExpandWidth(true), GUILayout.MaxHeight(102), GUILayout.Height(102));
// perform backward loop because we could even remove entries without issues
for (int i = 0; i < atlas.SvgAssetsCount(); ++i)
{
Rect rowRect;
isDirty |= this.SvgInputAssetDraw(atlas, i, out rowRect);
// keep track of row rectangle
if (currentEvent.type != EventType.Layout)
{
this.m_InputAssetsRects.Add(rowRect);
}
}
EditorGUILayout.EndScrollView();
// keep track of the scrollview area
scollRect = GUILayoutUtility.GetLastRect();
if (this.m_SvgListScrollPos != scrollPos)
{
this.m_SvgListScrollPos = scrollPos;
}
return(isDirty);
}
protected bool HandleDragEvents(SVGBasicAtlas atlas, Event currentEvent, Rect scollRect)
{
int i;
bool isDirty = false;
// events handler
if (currentEvent.type != EventType.Layout)
{
bool needRepaint = false;
// get mouse position relative to scollRect
Vector2 mousePos = currentEvent.mousePosition - new Vector2(scollRect.xMin, scollRect.yMin);
if (scollRect.Contains(currentEvent.mousePosition))
{
bool separatorInserted = false;
for (i = 0; i < atlas.SvgAssetsCount(); ++i)
{
// get the row rectangle relative to atlas.SvgList[i]
Rect rowRect = this.m_InputAssetsRects[i];
// expand the rectangle height
rowRect.yMin -= 3;
rowRect.yMax += 3;
if (rowRect.Contains(mousePos))
{
// a mousedown on a row, will stop an already started drag operation
if (currentEvent.type == EventType.MouseDown)
{
this.m_DragInfo.StopDrag();
}
// check if we are already dragging an object
if (this.m_DragInfo.Dragging)
{
if (!separatorInserted)
{
bool ok = true;
bool dragBefore = (mousePos.y <= rowRect.yMin + rowRect.height / 2) ? true : false;
// if we are dragging a text (asset) file, all positions are ok
// if we are dragging an already present SVG row, we must perform additional checks
if (!(this.m_DragInfo.DraggedObject is TextAsset))
{
if (this.m_DragInfo.DraggedObject == atlas.SvgAsset(i))
{
ok = false;
}
else
{
if (dragBefore)
{
if (i > 0 && this.m_DragInfo.DraggedObject == atlas.SvgAsset(i - 1))
{
ok = false;
}
}
else
{
if (i < (atlas.SvgAssetsCount() - 1) && this.m_DragInfo.DraggedObject == atlas.SvgAsset(i + 1))
{
ok = false;
}
}
}
}
if (ok)
{
if (dragBefore)
{
this.m_DragInfo.InsertIdx = i;
this.m_DragInfo.InsertBefore = true;
separatorInserted = true;
}
else
{
this.m_DragInfo.InsertIdx = i;
this.m_DragInfo.InsertBefore = false;
separatorInserted = true;
}
needRepaint = true;
}
}
}
else
{
// initialize the drag of an already present SVG document
if (currentEvent.type == EventType.MouseDrag)
{
DragAndDrop.PrepareStartDrag();
DragAndDrop.StartDrag("Start drag");
this.m_DragInfo.StartDrag(atlas.SvgAsset(i));
needRepaint = true;
}
}
}
}
// mouse is dragging inside the drop box, but not under an already present row; insertion point is inside the last element
if (this.m_DragInfo.Dragging && !separatorInserted && atlas.SvgAssetsCount() > 0 && mousePos.y > this.m_InputAssetsRects[atlas.SvgAssetsCount() - 1].yMax)
{
bool ok = true;
if (!(this.m_DragInfo.DraggedObject is TextAsset))
{
if (this.m_DragInfo.DraggedObject == atlas.SvgAsset(atlas.SvgAssetsCount() - 1))
{
ok = false;
}
}
if (ok)
{
this.m_DragInfo.InsertIdx = atlas.SvgAssetsCount() - 1;
this.m_DragInfo.InsertBefore = false;
needRepaint = true;
}
}
}
else
{
this.m_DragInfo.InsertIdx = -1;
}
if (needRepaint)
{
Repaint();
}
}
if (currentEvent.type == EventType.DragExited)
{
this.m_DragInfo.StopDrag();
DragAndDrop.objectReferences = new UnityEngine.Object[0];
}
else
{
switch (currentEvent.type)
{
case EventType.DragUpdated:
case EventType.DragPerform:
if (this.m_DragInfo.Dragging)
{
bool dragValid = true;
if (scollRect.Contains(currentEvent.mousePosition) && dragValid)
{
DragAndDrop.visualMode = DragAndDropVisualMode.Link;
if (currentEvent.type == EventType.DragPerform)
{
int index;
// accept drag&drop operation
DragAndDrop.AcceptDrag();
// check if we are dropping a text asset
if (this.m_DragInfo.DraggedObject is TextAsset)
{
// if a valid inter-position has not been selected, append the new asset at the end of list
if (this.m_DragInfo.InsertIdx < 0)
{
index = atlas.SvgAssetsCount();
}
else
{
index = (this.m_DragInfo.InsertBefore) ? this.m_DragInfo.InsertIdx : (this.m_DragInfo.InsertIdx + 1);
}
// add the text asset to the SVG list
if (atlas.SvgAssetAdd(this.m_DragInfo.DraggedObject as TextAsset, index))
{
isDirty = true;
}
}
else
{
// we are dropping an already present SVG row
index = (this.m_DragInfo.InsertBefore) ? this.m_DragInfo.InsertIdx : (this.m_DragInfo.InsertIdx + 1);
if (atlas.SvgAssetMove(this.m_DragInfo.DraggedObject as SVGAssetInput, index))
{
isDirty = true;
}
}
// now we can close the drag operation
this.m_DragInfo.StopDrag();
}
}
else
{
// if we are dragging outside of the allowed drop region, simply reject the drag&drop
DragAndDrop.visualMode = DragAndDropVisualMode.Rejected;
}
}
else
{
if (scollRect.Contains(currentEvent.mousePosition))
{
if (DragAndDrop.objectReferences != null && DragAndDrop.objectReferences.Length > 0)
{
UnityEngine.Object draggedObject = DragAndDrop.objectReferences[0];
// check object type, only TextAssets are allowed
if (draggedObject is TextAsset)
{
this.m_DragInfo.StartDrag(DragAndDrop.objectReferences[0]);
Repaint();
}
else
{
// acceptance is not confirmed (e.g. we are dragging a binary file)
DragAndDrop.visualMode = DragAndDropVisualMode.Rejected;
}
}
}
}
break;
default:
break;
}
}
return(isDirty);
}