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Started implementing drag&drop - for now, you can drag contents out of the

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DiskProbe window only. Only ASCII clippings will contain "text/plain" data,
so don't be surprised if Tracker sometimes doesn't create a clipping file
(if you drop on Tracker).


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10465 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2004-12-15 14:46:39 +00:00
parent fc1658382d
commit 8e9afca70f
2 changed files with 56 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
src/apps/diskprobe/DataView.cpp
View File

@ -30,6 +30,8 @@ static const uint32 kHexByteWidth = 3;
* accepted.
*/
// ToDo: a valid UTF-8 string would be nicer...
bool
is_valid_ascii(uint8 *data, size_t size)
{
@ -895,6 +897,45 @@ DataView::FrameResized(float width, float height)
}
void
DataView::InitiateDrag(view_focus focus)
{
BMessage *drag = new BMessage(B_MIME_DATA);
// Add originator and action
drag->AddPointer("be:originator", this);
//drag->AddString("be:clip_name", "Byte Clipping");
//drag->AddInt32("be_actions", B_TRASH_TARGET);
// Add data (just like in Copy())
uint8 *data = fData + fStart;
size_t length = fEnd + 1 - fStart;
drag->AddData(B_FILE_MIME_TYPE, B_MIME_TYPE, data, length);
if (is_valid_ascii(data, length))
drag->AddData("text/plain", B_MIME_TYPE, data, length);
// get a frame that contains the whole selection - SelectionFrame()
// only spans a rectangle between the start and the end point, so
// we have to pass it the correct input values
BRect frame;
const int32 width = kBlockSize - 1;
int32 first = fStart & ~width;
int32 last = ((fEnd + width) & ~width) - 1;
if (first == (last & ~width))
frame = SelectionFrame(focus, fStart, fEnd);
else
frame = SelectionFrame(focus, first, last);
BRect bounds = Bounds();
if (!bounds.Contains(frame))
frame = bounds & frame;
DragMessage(drag, frame, NULL);
}
void
DataView::MouseDown(BPoint where)
{
@ -902,14 +943,24 @@ DataView::MouseDown(BPoint where)
BMessage *message = Looper()->CurrentMessage();
int32 buttons;
if (message == NULL || message->FindInt32("buttons", &buttons) != B_OK
|| (buttons & B_PRIMARY_MOUSE_BUTTON) == 0)
if (message == NULL || message->FindInt32("buttons", &buttons) != B_OK)
return;
view_focus newFocus;
int32 position = PositionAt(kNoFocus, where, &newFocus);
if ((buttons & B_SECONDARY_MOUSE_BUTTON) != 0
&& position >= fStart && position <= fEnd) {
InitiateDrag(newFocus);
return;
}
if ((buttons & B_PRIMARY_MOUSE_BUTTON) == 0)
return;
int32 modifiers = message->FindInt32("modifiers");
view_focus newFocus;
fMouseSelectionStart = PositionAt(kNoFocus, where, &newFocus);
fMouseSelectionStart = position;
if (fMouseSelectionStart == -1) {
// "where" is outside the valid frame
return;

1
src/apps/diskprobe/DataView.h
View File

@ -77,6 +77,7 @@ class DataView : public BView {
void UpdateFromEditor(BMessage *message = NULL);
void ConvertLine(char *line, off_t offset, const uint8 *buffer, size_t size);
void InitiateDrag(view_focus focus);
void Copy();
void Paste();