| // Copyright (c) 2012 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. |
| |
| #ifndef UI_VIEWS_BUBBLE_BUBBLE_BORDER_H_ |
| #define UI_VIEWS_BUBBLE_BUBBLE_BORDER_H_ |
| |
| #include <memory> |
| |
| #include "base/compiler_specific.h" |
| #include "base/gtest_prod_util.h" |
| #include "base/macros.h" |
| #include "ui/gfx/image/image_skia.h" |
| #include "ui/views/background.h" |
| #include "ui/views/border.h" |
| |
| class SkPath; |
| class SkRRect; |
| |
| namespace gfx { |
| class Path; |
| class Rect; |
| } |
| |
| namespace views { |
| class Painter; |
| |
| namespace internal { |
| |
| // A helper that combines each border image-set painter with arrows and metrics. |
| struct BorderImages { |
| BorderImages(const int border_image_ids[], |
| const int arrow_image_ids[], |
| int border_interior_thickness, |
| int arrow_interior_thickness, |
| int corner_radius); |
| virtual ~BorderImages(); |
| |
| std::unique_ptr<Painter> border_painter; |
| gfx::ImageSkia left_arrow; |
| gfx::ImageSkia top_arrow; |
| gfx::ImageSkia right_arrow; |
| gfx::ImageSkia bottom_arrow; |
| |
| // The thickness of border and arrow images and their interior areas. |
| // Thickness is the width of left/right and the height of top/bottom images. |
| // The interior is measured without including stroke or shadow pixels. The tip |
| // of the arrow is |arrow_interior_thickness| from the border and the base is |
| // always twice that; drawn in the background color. |
| int border_thickness; |
| int border_interior_thickness; |
| int arrow_thickness; |
| int arrow_interior_thickness; |
| |
| // Width of an arrow (on the horizontal), including any shadows. Defaults to |
| // the width of the |top_arrow| asset. |
| int arrow_width; |
| |
| // The corner radius of the bubble's rounded-rect interior area. |
| int corner_radius; |
| }; |
| |
| } // namespace internal |
| |
| // Renders a border, with optional arrow, and a custom dropshadow. |
| // This can be used to produce floating "bubble" objects with rounded corners. |
| class VIEWS_EXPORT BubbleBorder : public Border { |
| public: |
| // Possible locations for the (optional) arrow. |
| // 0 bit specifies left or right. |
| // 1 bit specifies top or bottom. |
| // 2 bit specifies horizontal or vertical. |
| // 3 bit specifies whether the arrow at the center of its residing edge. |
| enum ArrowMask { |
| RIGHT = 0x01, |
| BOTTOM = 0x02, |
| VERTICAL = 0x04, |
| CENTER = 0x08, |
| }; |
| |
| enum Arrow { |
| TOP_LEFT = 0, |
| TOP_RIGHT = RIGHT, |
| BOTTOM_LEFT = BOTTOM, |
| BOTTOM_RIGHT = BOTTOM | RIGHT, |
| LEFT_TOP = VERTICAL, |
| RIGHT_TOP = VERTICAL | RIGHT, |
| LEFT_BOTTOM = VERTICAL | BOTTOM, |
| RIGHT_BOTTOM = VERTICAL | BOTTOM | RIGHT, |
| TOP_CENTER = CENTER, |
| BOTTOM_CENTER = CENTER | BOTTOM, |
| LEFT_CENTER = CENTER | VERTICAL, |
| RIGHT_CENTER = CENTER | VERTICAL | RIGHT, |
| NONE = 16, // No arrow. Positioned under the supplied rect. |
| FLOAT = 17, // No arrow. Centered over the supplied rect. |
| }; |
| |
| enum Shadow { |
| NO_SHADOW = 0, |
| NO_SHADOW_OPAQUE_BORDER, |
| BIG_SHADOW, |
| SMALL_SHADOW, |
| NO_ASSETS, |
| SHADOW_COUNT, |
| }; |
| |
| // The position of the bubble in relation to the anchor. |
| enum BubbleAlignment { |
| // The tip of the arrow points to the middle of the anchor. |
| ALIGN_ARROW_TO_MID_ANCHOR, |
| // The edge nearest to the arrow is lined up with the edge of the anchor. |
| ALIGN_EDGE_TO_ANCHOR_EDGE, |
| }; |
| |
| // The way the arrow should be painted. |
| // TODO(estade): Harmony doesn't use this enum; remove it. |
| enum ArrowPaintType { |
| // Fully render the arrow. |
| PAINT_NORMAL, |
| // Leave space for the arrow, but do not paint it. |
| PAINT_TRANSPARENT, |
| // Neither paint nor leave space for the arrow. |
| PAINT_NONE, |
| }; |
| |
| BubbleBorder(Arrow arrow, Shadow shadow, SkColor color); |
| ~BubbleBorder() override; |
| |
| static bool has_arrow(Arrow a) { return a < NONE; } |
| |
| static bool is_arrow_on_left(Arrow a) { |
| return has_arrow(a) && (a == LEFT_CENTER || !(a & (RIGHT | CENTER))); |
| } |
| |
| static bool is_arrow_on_top(Arrow a) { |
| return has_arrow(a) && (a == TOP_CENTER || !(a & (BOTTOM | CENTER))); |
| } |
| |
| static bool is_arrow_on_horizontal(Arrow a) { |
| return a >= NONE ? false : !(a & VERTICAL); |
| } |
| |
| static bool is_arrow_at_center(Arrow a) { |
| return has_arrow(a) && !!(a & CENTER); |
| } |
| |
| static Arrow horizontal_mirror(Arrow a) { |
| return (a == TOP_CENTER || a == BOTTOM_CENTER || a >= NONE) ? |
| a : static_cast<Arrow>(a ^ RIGHT); |
| } |
| |
| static Arrow vertical_mirror(Arrow a) { |
| return (a == LEFT_CENTER || a == RIGHT_CENTER || a >= NONE) ? |
| a : static_cast<Arrow>(a ^ BOTTOM); |
| } |
| |
| // Get or set the arrow type. |
| void set_arrow(Arrow arrow) { arrow_ = arrow; } |
| Arrow arrow() const { return arrow_; } |
| |
| // Get or set the bubble alignment. |
| void set_alignment(BubbleAlignment alignment) { alignment_ = alignment; } |
| BubbleAlignment alignment() const { return alignment_; } |
| |
| // Get the shadow type. |
| Shadow shadow() const { return shadow_; } |
| |
| // Get or set the background color for the bubble and arrow body. |
| void set_background_color(SkColor color) { background_color_ = color; } |
| SkColor background_color() const { return background_color_; } |
| |
| // If true, the background color should be determined by the host's |
| // NativeTheme. |
| void set_use_theme_background_color(bool use_theme_background_color) { |
| use_theme_background_color_ = use_theme_background_color; |
| } |
| bool use_theme_background_color() { return use_theme_background_color_; } |
| |
| // Sets a desired pixel distance between the arrow tip and the outside edge of |
| // the neighboring border image. For example: |----offset----| |
| // '(' represents shadow around the '{' edge: ((({ ^ }))) |
| // The arrow will still anchor to the same location but the bubble will shift |
| // location to place the arrow |offset| pixels from the perpendicular edge. |
| void set_arrow_offset(int offset) { arrow_offset_ = offset; } |
| |
| // Sets the way the arrow is actually painted. Default is PAINT_NORMAL. |
| void set_paint_arrow(ArrowPaintType value); |
| |
| // Get the desired widget bounds (in screen coordinates) given the anchor rect |
| // and bubble content size; calculated from shadow and arrow image dimensions. |
| virtual gfx::Rect GetBounds(const gfx::Rect& anchor_rect, |
| const gfx::Size& contents_size) const; |
| |
| // Get the border exterior thickness, including stroke and shadow, in pixels. |
| int GetBorderThickness() const; |
| |
| // Returns the corner radius of the current image set. |
| int GetBorderCornerRadius() const; |
| |
| // Gets the arrow offset to use. |
| int GetArrowOffset(const gfx::Size& border_size) const; |
| |
| // Retreives the arrow path given |view_bounds|. |view_bounds| should be local |
| // bounds of the view. |
| // Returns false if |path| is unchanged, which is the case when there is no |
| // painted arrow. |
| // The returned path does not account for arrow stroke and shadow. |
| bool GetArrowPath(const gfx::Rect& view_bounds, gfx::Path* path) const; |
| |
| // Sets border thickness overriding the thickness set on |images_| creation. |
| // May only be invoked after |arrow_paint_type_| has been set. |
| void SetBorderInteriorThickness(int border_interior_thickness); |
| |
| // Overridden from Border: |
| void Paint(const View& view, gfx::Canvas* canvas) override; |
| gfx::Insets GetInsets() const override; |
| gfx::Size GetMinimumSize() const override; |
| |
| private: |
| FRIEND_TEST_ALL_PREFIXES(BubbleBorderTest, GetSizeForContentsSizeTest); |
| FRIEND_TEST_ALL_PREFIXES(BubbleBorderTest, GetBoundsOriginTest); |
| FRIEND_TEST_ALL_PREFIXES(BubbleBorderTest, ShadowTypes); |
| |
| // The border and arrow stroke size used in image assets, in pixels. |
| static const int kStroke; |
| |
| gfx::Size GetSizeForContentsSize(const gfx::Size& contents_size) const; |
| gfx::ImageSkia* GetArrowImage() const; |
| gfx::Rect GetArrowRect(const gfx::Rect& bounds) const; |
| void GetArrowPathFromArrowBounds(const gfx::Rect& arrow_bounds, |
| SkPath* path) const; |
| void DrawArrow(gfx::Canvas* canvas, const gfx::Rect& arrow_bounds) const; |
| |
| // Returns the region within |view| representing the client area. This can be |
| // set as a canvas clip to ensure any fill or shadow from the border does not |
| // draw over the contents of the bubble. |
| SkRRect GetClientRect(const View& view) const; |
| |
| // Paints an MD border. Ignores |shadow_|. |
| void PaintMd(const View& view, gfx::Canvas* canvas); |
| |
| // Paint for the NO_ASSETS shadow type. This just paints transparent pixels |
| // to make the window shape based on insets and GetBorderCornerRadius(). |
| void PaintNoAssets(const View& view, gfx::Canvas* canvas); |
| |
| internal::BorderImages* GetImagesForTest() const; |
| |
| Arrow arrow_; |
| int arrow_offset_; |
| ArrowPaintType arrow_paint_type_; |
| BubbleAlignment alignment_; |
| Shadow shadow_; |
| internal::BorderImages* images_; |
| SkColor background_color_; |
| bool use_theme_background_color_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BubbleBorder); |
| }; |
| |
| // A Background that clips itself to the specified BubbleBorder and uses |
| // the background color of the BubbleBorder. |
| class VIEWS_EXPORT BubbleBackground : public Background { |
| public: |
| explicit BubbleBackground(BubbleBorder* border) : border_(border) {} |
| |
| // Overridden from Background: |
| void Paint(gfx::Canvas* canvas, View* view) const override; |
| |
| private: |
| BubbleBorder* border_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BubbleBackground); |
| }; |
| |
| } // namespace views |
| |
| #endif // UI_VIEWS_BUBBLE_BUBBLE_BORDER_H_ |