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Side by Side Diff: ui/base/dragdrop/drag_utils.cc

Issue 10702136: Support high dpi in menu scroll arrow, submenu arrow and drag_utils. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: . Created 8 years, 5 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "ui/base/dragdrop/drag_utils.h" 5 #include "ui/base/dragdrop/drag_utils.h"
6 6
7 #include "base/file_util.h" 7 #include "base/file_util.h"
8 #include "base/logging.h" 8 #include "base/logging.h"
9 #include "base/utf_string_conversions.h" 9 #include "base/utf_string_conversions.h"
10 #include "googleurl/src/gurl.h" 10 #include "googleurl/src/gurl.h"
11 #include "ui/base/dragdrop/os_exchange_data.h" 11 #include "ui/base/dragdrop/os_exchange_data.h"
12 #include "ui/base/resource/resource_bundle.h" 12 #include "ui/base/resource/resource_bundle.h"
13 #include "ui/gfx/canvas.h" 13 #include "ui/gfx/canvas.h"
14 #include "ui/gfx/font.h" 14 #include "ui/gfx/font.h"
15 #include "ui/gfx/image/canvas_image_source.h"
15 #include "ui/gfx/point.h" 16 #include "ui/gfx/point.h"
16 #include "ui/gfx/size.h" 17 #include "ui/gfx/size.h"
17 18
18 namespace drag_utils { 19 namespace drag_utils {
19 20 namespace {
20 // Maximum width of the link drag image in pixels. 21 // Maximum width of the link drag image in pixels.
21 static const int kLinkDragImageVPadding = 3; 22 const int kLinkDragImageVPadding = 3;
22 23
23 // File dragging pixel measurements 24 // File dragging pixel measurements
24 static const int kFileDragImageMaxWidth = 200; 25 const int kFileDragImageMaxWidth = 200;
25 static const SkColor kFileDragImageTextColor = SK_ColorBLACK; 26 const SkColor kFileDragImageTextColor = SK_ColorBLACK;
27
28 gfx::Size GetImageSize(const gfx::ImageSkia& icon) {
29 ResourceBundle& rb = ResourceBundle::GetSharedInstance();
30 gfx::Font font = rb.GetFont(ResourceBundle::BaseFont);
31
32 const int width = kFileDragImageMaxWidth;
33 // Add +2 here to allow room for the halo.
34 const int height = font.GetHeight() + icon.height() +
35 kLinkDragImageVPadding + 2;
36 return gfx::Size(width, height);
37 }
38
39 class DragImageSource : public gfx::CanvasImageSource {
40 public:
41 DragImageSource(const gfx::ImageSkia& icon, const string16& name)
42 : CanvasImageSource(GetImageSize(icon), false /* translucent */),
43 icon_(icon),
44 name_(name) {
45 }
46 virtual ~DragImageSource() {}
47
48 // gfx::CanvasImageSource overrides:
49 virtual void Draw(gfx::Canvas* canvas) OVERRIDE {
50 // Set up our text portion
51 ResourceBundle& rb = ResourceBundle::GetSharedInstance();
52 gfx::Font font = rb.GetFont(ResourceBundle::BaseFont);
53
54 int width = size().width();
55 // Paint the icon.
56 canvas->DrawImageInt(icon_, (width - icon_.width()) / 2, 0);
57
58 const int flags = gfx::Canvas::TEXT_ALIGN_CENTER;
59 #if defined(OS_WIN)
60 // Paint the file name. We inset it one pixel to allow room for the halo.
61 canvas->DrawStringWithHalo(name_, font,
62 kFileDragImageTextColor, SK_ColorWHITE,
63 1, icon_.height() + kLinkDragImageVPadding + 1,
64 width - 2, font.GetHeight(), flags);
65 #else
66 // NO_SUBPIXEL_RENDERING is required when drawing to a non-opaque canvas.
67 canvas->DrawStringInt(name_, font,
68 kFileDragImageTextColor,
69 0, icon_.height() + kLinkDragImageVPadding,
70 width, font.GetHeight(),
71 flags | gfx::Canvas::NO_SUBPIXEL_RENDERING);
72 #endif
73 }
74
75 private:
76 const gfx::ImageSkia icon_;
77 const string16 name_;
78
79 DISALLOW_COPY_AND_ASSIGN(DragImageSource);
80 };
81
82 } // namespace
26 83
27 void CreateDragImageForFile(const FilePath& file_name, 84 void CreateDragImageForFile(const FilePath& file_name,
28 const gfx::ImageSkia* icon, 85 const gfx::ImageSkia* icon,
29 ui::OSExchangeData* data_object) { 86 ui::OSExchangeData* data_object) {
30 DCHECK(icon); 87 DCHECK(icon);
31 DCHECK(data_object); 88 DCHECK(data_object);
32 89
33 // Set up our text portion 90 string16 name = file_name.BaseName().LossyDisplayName();
34 ResourceBundle& rb = ResourceBundle::GetSharedInstance(); 91 DragImageSource* source = new DragImageSource(*icon, name);
35 gfx::Font font = rb.GetFont(ResourceBundle::BaseFont); 92 gfx::Size size = source->size();
36 93
37 const int width = kFileDragImageMaxWidth; 94 SetDragImageOnDataObject(gfx::ImageSkia(source, size), size,
38 // Add +2 here to allow room for the halo. 95 gfx::Point(size.width() / 2, kLinkDragImageVPadding),
39 const int height = font.GetHeight() + icon->height() +
40 kLinkDragImageVPadding + 2;
41 gfx::Canvas canvas(gfx::Size(width, height), false /* translucent */);
42
43 // Paint the icon.
44 canvas.DrawImageInt(*icon, (width - icon->width()) / 2, 0);
45
46 string16 name = file_name.BaseName().LossyDisplayName();
47 const int flags = gfx::Canvas::TEXT_ALIGN_CENTER;
48 #if defined(OS_WIN)
49 // Paint the file name. We inset it one pixel to allow room for the halo.
50 canvas.DrawStringWithHalo(name, font, kFileDragImageTextColor, SK_ColorWHITE,
51 1, icon->height() + kLinkDragImageVPadding + 1,
52 width - 2, font.GetHeight(), flags);
53 #else
54 // NO_SUBPIXEL_RENDERING is required when drawing to a non-opaque canvas.
55 canvas.DrawStringInt(name, font, kFileDragImageTextColor,
56 0, icon->height() + kLinkDragImageVPadding,
57 width, font.GetHeight(),
58 flags | gfx::Canvas::NO_SUBPIXEL_RENDERING);
59 #endif
60
61 SetDragImageOnDataObject(canvas, gfx::Size(width, height),
62 gfx::Point(width / 2, kLinkDragImageVPadding),
63 data_object); 96 data_object);
64 } 97 }
65 98
66 void SetDragImageOnDataObject(const gfx::Canvas& canvas, 99 void SetDragImageOnDataObject(const gfx::Canvas& canvas,
67 const gfx::Size& size, 100 const gfx::Size& size,
68 const gfx::Point& cursor_offset, 101 const gfx::Point& cursor_offset,
69 ui::OSExchangeData* data_object) { 102 ui::OSExchangeData* data_object) {
70 SetDragImageOnDataObject(canvas.ExtractImageSkiaRep(), size, cursor_offset, 103 SetDragImageOnDataObject(canvas.ExtractImageSkiaRep(), size, cursor_offset,
71 data_object); 104 data_object);
72 } 105 }
73 106
74 } // namespace drag_utils 107 } // namespace drag_utils
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