blob: fa6c9a06a20e07b59f88c9fc05041c9334e6cf9a [file] [log] [blame]
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "views/drag_utils.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/utf_string_conversions.h"
#include "googleurl/src/gurl.h"
#include "grit/ui_resources.h"
#include "ui/base/dragdrop/os_exchange_data.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/canvas_skia.h"
#include "ui/gfx/font.h"
#include "views/controls/button/text_button.h"
using ui::OSExchangeData;
namespace drag_utils {
// Maximum width of the link drag image in pixels.
static const int kLinkDragImageMaxWidth = 200;
static const int kLinkDragImageVPadding = 3;
// File dragging pixel measurements
static const int kFileDragImageMaxWidth = 200;
static const SkColor kFileDragImageTextColor = SK_ColorBLACK;
void SetURLAndDragImage(const GURL& url,
const string16& title,
const SkBitmap& icon,
OSExchangeData* data) {
DCHECK(url.is_valid() && data);
data->SetURL(url, title);
// Create a button to render the drag image for us.
views::TextButton button(NULL,
title.empty() ? UTF8ToUTF16(url.spec()) : title);
button.set_max_width(kLinkDragImageMaxWidth);
if (icon.isNull()) {
button.SetIcon(*ResourceBundle::GetSharedInstance().GetBitmapNamed(
IDR_DEFAULT_FAVICON));
} else {
button.SetIcon(icon);
}
gfx::Size prefsize = button.GetPreferredSize();
button.SetBounds(0, 0, prefsize.width(), prefsize.height());
// Render the image.
gfx::CanvasSkia canvas(prefsize.width(), prefsize.height(), false);
button.PaintButton(&canvas, views::TextButton::PB_FOR_DRAG);
SetDragImageOnDataObject(canvas, prefsize,
gfx::Point(prefsize.width() / 2, prefsize.height() / 2), data);
}
void CreateDragImageForFile(const FilePath& file_name,
const SkBitmap* icon,
OSExchangeData* data_object) {
DCHECK(icon);
DCHECK(data_object);
// Set up our text portion
ResourceBundle& rb = ResourceBundle::GetSharedInstance();
gfx::Font font = rb.GetFont(ResourceBundle::BaseFont);
const int width = kFileDragImageMaxWidth;
// Add +2 here to allow room for the halo.
const int height = font.GetHeight() + icon->height() +
kLinkDragImageVPadding + 2;
gfx::CanvasSkia canvas(width, height, false /* translucent */);
// Paint the icon.
canvas.DrawBitmapInt(*icon, (width - icon->width()) / 2, 0);
string16 name = file_name.BaseName().LossyDisplayName();
#if defined(OS_WIN)
// Paint the file name. We inset it one pixel to allow room for the halo.
canvas.DrawStringWithHalo(name, font, kFileDragImageTextColor, SK_ColorWHITE,
1, icon->height() + kLinkDragImageVPadding + 1,
width - 2, font.GetHeight(),
gfx::Canvas::TEXT_ALIGN_CENTER);
#else
canvas.DrawStringInt(name, font, kFileDragImageTextColor,
0, icon->height() + kLinkDragImageVPadding,
width, font.GetHeight(), gfx::Canvas::TEXT_ALIGN_CENTER);
#endif
SetDragImageOnDataObject(canvas, gfx::Size(width, height),
gfx::Point(width / 2, kLinkDragImageVPadding),
data_object);
}
void SetDragImageOnDataObject(const gfx::Canvas& canvas,
const gfx::Size& size,
const gfx::Point& cursor_offset,
OSExchangeData* data_object) {
SetDragImageOnDataObject(
canvas.AsCanvasSkia()->ExtractBitmap(), size, cursor_offset, data_object);
}
} // namespace drag_utils