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win: Use drag_utils::CreateDragImageForFile

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This commit is contained in:
Cheng Zhao 2016-07-03 14:44:47 +09:00
parent 63a8961ed1
commit 7916f0ea18
1 changed files with 1 additions and 83 deletions
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84
atom/browser/ui/drag_util_views.cc
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@ -4,13 +4,6 @@
#include "atom/browser/ui/drag_util.h"
#if defined(OS_WIN)
#include <objidl.h>
#include <shlobj.h>
#include <shobjidl.h>
#include <stddef.h>
#endif
#include "ui/aura/window.h"
#include "ui/base/dragdrop/drag_drop_types.h"
#include "ui/base/dragdrop/drag_utils.h"
@ -21,90 +14,15 @@
#include "ui/views/widget/widget.h"
#include "ui/wm/public/drag_drop_client.h"
#if defined(OS_WIN)
#include "base/win/scoped_comptr.h"
#include "base/win/scoped_hdc.h"
#include "ui/base/dragdrop/os_exchange_data_provider_win.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/gdi_util.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/skbitmap_operations.h"
#endif
namespace atom {
namespace {
#if defined(OS_WIN)
void SetDragImageOnDataObject(HBITMAP hbitmap,
const gfx::Size& size_in_pixels,
const gfx::Vector2d& cursor_offset,
IDataObject* data_object) {
base::win::ScopedComPtr<IDragSourceHelper> helper;
HRESULT rv = CoCreateInstance(CLSID_DragDropHelper, 0, CLSCTX_INPROC_SERVER,
IID_IDragSourceHelper, helper.ReceiveVoid());
if (SUCCEEDED(rv)) {
SHDRAGIMAGE sdi;
sdi.sizeDragImage = size_in_pixels.ToSIZE();
sdi.crColorKey = 0xFFFFFFFF;
sdi.hbmpDragImage = hbitmap;
sdi.ptOffset = gfx::PointAtOffsetFromOrigin(cursor_offset).ToPOINT();
helper->InitializeFromBitmap(&sdi, data_object);
}
}
// Blit the contents of the canvas to a new HBITMAP. It is the caller's
// responsibility to release the |bits| buffer.
HBITMAP CreateHBITMAPFromSkBitmap(const SkBitmap& sk_bitmap) {
base::win::ScopedGetDC screen_dc(NULL);
BITMAPINFOHEADER header;
gfx::CreateBitmapHeader(sk_bitmap.width(), sk_bitmap.height(), &header);
void* bits;
HBITMAP bitmap =
CreateDIBSection(screen_dc, reinterpret_cast<BITMAPINFO*>(&header),
DIB_RGB_COLORS, &bits, NULL, 0);
if (!bitmap || !bits)
return NULL;
DCHECK_EQ(sk_bitmap.rowBytes(), static_cast<size_t>(sk_bitmap.width() * 4));
SkAutoLockPixels lock(sk_bitmap);
memcpy(
bits, sk_bitmap.getPixels(), sk_bitmap.height() * sk_bitmap.rowBytes());
return bitmap;
}
void SetDragImageOnDataObject(const gfx::ImageSkia& image_skia,
const gfx::Vector2d& cursor_offset,
ui::OSExchangeData* data_object) {
DCHECK(data_object && !image_skia.size().IsEmpty());
// InitializeFromBitmap() doesn't expect an alpha channel and is confused
// by premultiplied colors, so unpremultiply the bitmap.
// SetDragImageOnDataObject(HBITMAP) takes ownership of the bitmap.
HBITMAP bitmap = CreateHBITMAPFromSkBitmap(
SkBitmapOperations::UnPreMultiply(*image_skia.bitmap()));
if (bitmap) {
// Attach 'bitmap' to the data_object.
SetDragImageOnDataObject(
bitmap,
gfx::Size(image_skia.bitmap()->width(), image_skia.bitmap()->height()),
cursor_offset,
ui::OSExchangeDataProviderWin::GetIDataObject(*data_object));
}
}
#endif
} // namespace
void DragFileItems(const std::vector<base::FilePath>& files,
const gfx::Image& icon,
gfx::NativeView view) {
// Set up our OLE machinery
ui::OSExchangeData data;
#if defined(OS_WIN)
SetDragImageOnDataObject(icon.AsImageSkia(), gfx::Vector2d(), &data);
#endif
data.provider().SetDragImage(icon.AsImageSkia(), gfx::Vector2d());
drag_utils::CreateDragImageForFile(files[0], icon.AsImageSkia(), &data);
std::vector<ui::FileInfo> file_infos;
for (const base::FilePath& file : files) {