Fierelier/notepad-plus-plus-legacy
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[ENHANCE] Drag and drop feature (in progress).

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git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@841 f5eea248-9336-0410-98b8-ebc06183d4e3
This commit is contained in:
Don Ho 2011-11-09 21:31:44 +00:00
parent 117136e341
commit 721d283366
2 changed files with 34 additions and 33 deletions
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58
PowerEditor/src/WinControls/ProjectPanel/TreeView.cpp
View File

@ -28,8 +28,8 @@ void TreeView::init(HINSTANCE hInst, HWND parent, int treeViewID)
_hSelf = CreateWindowEx(0,
WC_TREEVIEW,
TEXT("Tree View"),
TVS_HASBUTTONS | WS_CHILD | WS_BORDER | WS_HSCROLL |
TVS_HASLINES | TVS_HASBUTTONS | TVS_SHOWSELALWAYS | TVS_EDITLABELS | TVS_INFOTIP | WS_TABSTOP,
WS_CHILD | WS_BORDER | WS_HSCROLL | WS_TABSTOP | TVS_LINESATROOT | TVS_HASLINES |
TVS_HASBUTTONS | TVS_HASBUTTONS | TVS_SHOWSELALWAYS | TVS_EDITLABELS | TVS_INFOTIP,
0, 0, 0, 0,
_hParent,
NULL,
@ -188,29 +188,13 @@ void TreeView::dragItem(HWND parentHandle, int x, int y)
HTREEITEM targetItem = (HTREEITEM)::SendMessage(_hSelf, TVM_HITTEST, (WPARAM)0, (LPARAM)&hitTestInfo);
if(targetItem)
{
// highlight the target of drag-and-drop operation
::SendMessage(_hSelf, TVM_SELECTITEM, (WPARAM)(TVGN_DROPHILITE), (LPARAM)targetItem);
if (canBeDropped(_draggedItem, targetItem))
// highlight the target of drag-and-drop operation
::SendMessage(_hSelf, TVM_SELECTITEM, (WPARAM)(TVGN_DROPHILITE), (LPARAM)targetItem);
}
// show the dragged image
::ImageList_DragShowNolock(true);
/*
ImageList_DragMove(x-32, y-25); // where to draw the drag from
ImageList_DragShowNolock(FALSE);
// the highlight items should be as
// the same points as the drag
TVHITTESTINFO tvht;
tvht.pt.x = x-20;
tvht.pt.y = y-20; //
HTREEITEM hitTarget=(HTREEITEM)SendMessage(parentHandle,TVM_HITTEST,NULL,(LPARAM)&tvht);
if (hitTarget) // if there is a hit
SendMessage(parentHandle,TVM_SELECTITEM,TVGN_DROPHILITE,(LPARAM)hitTarget); // highlight it
ImageList_DragShowNolock(TRUE);
*/
}
void TreeView::dropItem()
@ -237,17 +221,29 @@ void TreeView::dropItem()
_draggedItem = 0;
_draggedImageList = 0;
_isItemDragged = false;
}
bool TreeView::canBeDropped(HTREEITEM draggedItem, HTREEITEM targetItem)
{
if (draggedItem == targetItem)
return false;
if (targetItem == TreeView_GetRoot(_hSelf))
return false;
if (isDescendant(targetItem, draggedItem))
return false;
return true;
}
bool TreeView::isDescendant(HTREEITEM targetItem, HTREEITEM draggedItem)
{
if (TreeView_GetRoot(_hSelf) == targetItem)
return false;
HTREEITEM parent = TreeView_GetParent(_hSelf, targetItem);
if (parent == draggedItem)
return true;
/*
ImageList_DragLeave(_hSelf);
ImageList_EndDrag();
HTREEITEM Selected=(HTREEITEM)SendMessage(_hSelf,TVM_GETNEXTITEM,TVGN_DROPHILITE,0);
SendMessage(_hSelf,TVM_SELECTITEM,TVGN_CARET,(LPARAM)Selected);
SendMessage(_hSelf,TVM_SELECTITEM,TVGN_DROPHILITE,0);
ReleaseCapture();
ShowCursor(TRUE);
_isItemDragged = FALSE;
*/
return isDescendant(parent, draggedItem);
}
void TreeView::moveTreeViewItem(HTREEITEM draggedItem, HTREEITEM targetItem)

9
PowerEditor/src/WinControls/ProjectPanel/TreeView.h
View File

@ -52,13 +52,13 @@ public:
};
void setItemImage(HTREEITEM hTreeItem, int iImage, int iSelectedImage);
// Drag and Drop operations
void beginDrag(NMTREEVIEW* tv);
void dragItem(HWND parentHandle, int x, int y);
void dropItem();
bool isDragging() const {
return _isItemDragged;
};
void moveTreeViewItem(HTREEITEM draggedItem, HTREEITEM targetItem);
void dropItem();
protected:
WNDPROC _defaultProc;
@ -68,6 +68,11 @@ protected:
return (((TreeView *)(::GetWindowLongPtr(hwnd, GWL_USERDATA)))->runProc(hwnd, Message, wParam, lParam));
};
// Drag and Drop operations
bool canBeDropped(HTREEITEM draggedItem, HTREEITEM targetItem);
void moveTreeViewItem(HTREEITEM draggedItem, HTREEITEM targetItem);
bool isDescendant(HTREEITEM targetItem, HTREEITEM draggedItem);
private:
// Drag and drop
HTREEITEM _draggedItem;