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| author | oshima@chromium.org <oshima@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2010-03-02 23:47:09 +0000 |
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| committer | oshima@chromium.org <oshima@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2010-03-02 23:47:09 +0000 |
| commit | 83f220770080621463758bce86d195bb60edc178 (patch) | |
| tree | 8484a5a144b46c0b4115b694a8854a8bde04c420 /chrome/browser/notifications/balloon_collection_impl.h | |
| parent | ae40ccd86384f6d6246f0d01b6629df16a008402 (diff) | |
| download | chromium_src-83f220770080621463758bce86d195bb60edc178.zip chromium_src-83f220770080621463758bce86d195bb60edc178.tar.gz chromium_src-83f220770080621463758bce86d195bb60edc178.tar.bz2 | |
Refactoring balloon collection and added chromeos's BalloonCollection.
* Separated BalloonCollection and BalloonCollectionImpl
* Moved BalloonSpaceChangeListener to BalloonCollection from BalloonCollectionImpl as this listener is used by NotificationUIManager.
* Added BalloonCollectionImpl for chromeos. (chromeos/notifications/balloon_collectino_impl.{h,cc})
* Changed NotificationPanel to use ScrollView to show all notifications in the panel.
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/660111
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@40460 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'chrome/browser/notifications/balloon_collection_impl.h')
| -rw-r--r-- | chrome/browser/notifications/balloon_collection_impl.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/chrome/browser/notifications/balloon_collection_impl.h b/chrome/browser/notifications/balloon_collection_impl.h new file mode 100644 index 0000000..c8eef59 --- /dev/null +++ b/chrome/browser/notifications/balloon_collection_impl.h @@ -0,0 +1,120 @@ +// Copyright (c) 2010 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. + +// Handles the visible notification (or balloons). + +#ifndef CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_IMPL_H_ +#define CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_IMPL_H_ + +#include <deque> + +#include "base/basictypes.h" +#include "base/gfx/point.h" +#include "base/gfx/rect.h" +#include "chrome/browser/notifications/balloon_collection.h" + +// A balloon collection represents a set of notification balloons being +// shown on the screen. It positions new notifications according to +// a layout, and monitors for balloons being closed, which it reports +// up to its parent, the notification UI manager. +class BalloonCollectionImpl : public BalloonCollection { + public: + BalloonCollectionImpl(); + virtual ~BalloonCollectionImpl(); + + // BalloonCollectionInterface overrides + virtual void Add(const Notification& notification, + Profile* profile); + virtual bool Remove(const Notification& notification); + virtual bool HasSpace() const; + virtual void ResizeBalloon(Balloon* balloon, const gfx::Size& size); + virtual void OnBalloonClosed(Balloon* source); + + protected: + // Calculates layout values for the balloons including + // the scaling, the max/min sizes, and the upper left corner of each. + class Layout { + public: + Layout(); + + // Refresh the work area and balloon placement. + void OnDisplaySettingsChanged(); + + // TODO(johnnyg): Scale the size to account for the system font factor. + static int min_balloon_width() { return kBalloonMinWidth; } + static int max_balloon_width() { return kBalloonMaxWidth; } + static int min_balloon_height() { return kBalloonMinHeight; } + static int max_balloon_height() { return kBalloonMaxHeight; } + + // Returns both the total space available and the maximum + // allowed per balloon. + // + // The size may be a height or length depending on the way that + // balloons are laid out. + void GetMaxLinearSize(int* max_balloon_size, int* total_size) const; + + // Refresh the cached values for work area and drawing metrics. + // The application should call this method to re-acquire metrics after + // any resolution or settings change. + // Returns true if and only if a metric changed. + bool RefreshSystemMetrics(); + + // Returns the origin for the sequence of balloons depending on layout. + // Should not be used to place a balloon -- only to call NextPosition(). + gfx::Point GetLayoutOrigin() const; + + // Compute the position for the next balloon. + // Start with *position_iterator = GetLayoutOrigin() and call repeatedly + // to get a sequence of positions. Return value is the upper-left coordinate + // for each next balloon. + gfx::Point NextPosition(const gfx::Size& balloon_size, + gfx::Point* position_iterator) const; + + private: + enum Placement { + HORIZONTALLY_FROM_BOTTOM_LEFT, + HORIZONTALLY_FROM_BOTTOM_RIGHT, + VERTICALLY_FROM_TOP_RIGHT, + VERTICALLY_FROM_BOTTOM_RIGHT + }; + + // Layout parameters + int VerticalEdgeMargin() const; + int HorizontalEdgeMargin() const; + int InterBalloonMargin() const; + + // Minimum and maximum size of balloon content. + static const int kBalloonMinWidth = 300; + static const int kBalloonMaxWidth = 300; + static const int kBalloonMinHeight = 24; + static const int kBalloonMaxHeight = 120; + + static Placement placement_; + gfx::Rect work_area_; + DISALLOW_COPY_AND_ASSIGN(Layout); + }; + + // Creates a new balloon. Overridable by unit tests. The caller is + // responsible for freeing the pointer returned. + virtual Balloon* MakeBalloon(const Notification& notification, + Profile* profile); + + private: + // The number of balloons being displayed. + int count() const { return balloons_.size(); } + + // Adjusts the positions of the balloons (e.g., when one is closed). + void PositionBalloons(bool is_reposition); + + // Queue of active balloons. + typedef std::deque<Balloon*> Balloons; + Balloons balloons_; + + // The layout parameters for balloons in this collection. + Layout layout_; + + DISALLOW_COPY_AND_ASSIGN(BalloonCollectionImpl); +}; + +#endif // CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_IMPL_H_ |