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// Copyright (c) 2006-2008 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 CHROME_VIEWS_NON_CLIENT_VIEW_H_
#define CHROME_VIEWS_NON_CLIENT_VIEW_H_
#include "chrome/views/view.h"
#include "chrome/views/client_view.h"
namespace gfx {
class Path;
}
namespace views {
///////////////////////////////////////////////////////////////////////////////
// NonClientView
//
// An object implementing the NonClientView interface is a View that provides
// the "non-client" areas of a window. This is the area that typically
// encompasses the window frame - title bar, sizing borders and window
// controls. This interface provides methods that allow a specific
// presentation to define non-client areas for windows hit testing, the shape
// of the window, and other window-related information.
//
class NonClientView : public View {
public:
NonClientView();
virtual ~NonClientView();
// Various edges of the frame border have a 1 px shadow along their edges; in
// a few cases we shift elements based on this amount for visual appeal.
static const int kFrameShadowThickness;
// In restored mode, we draw a 1 px edge around the content area inside the
// frame border.
static const int kClientEdgeThickness;
// Returns true if the ClientView determines that the containing window can be
// closed, false otherwise.
bool CanClose() const;
// Called by the containing Window when it is closed.
void WindowClosing();
// Calculates the bounds of the client area of the window assuming the
// window is sized to |width| and |height|.
virtual gfx::Rect CalculateClientAreaBounds(int width, int height) const;
// Calculates the size of window required to display a client area of the
// specified width and height.
virtual gfx::Size CalculateWindowSizeForClientSize(int width,
int height) const;
// Returns the point, in screen coordinates, where the system menu should
// be shown so it shows up anchored to the system menu icon.
virtual gfx::Point GetSystemMenuPoint() const;
// Determines the windows HT* code when the mouse cursor is at the
// specified point, in window coordinates.
virtual int NonClientHitTest(const gfx::Point& point);
// Returns a mask to be used to clip the top level window for the given
// size. This is used to create the non-rectangular window shape.
virtual void GetWindowMask(const gfx::Size& size,
gfx::Path* window_mask);
// Toggles the enable state for the Close button (and the Close menu item in
// the system menu).
virtual void EnableClose(bool enable);
// Tells the window controls as rendered by the NonClientView to reset
// themselves to a normal state. This happens in situations where the
// containing window does not receive a normal sequences of messages that
// would lead to the controls returning to this normal state naturally, e.g.
// when the window is maximized, minimized or restored.
virtual void ResetWindowControls();
// Prevents the non-client view from rendering as inactive when called with
// |disable| true, until called with false.
void set_paint_as_active(bool paint_as_active) {
paint_as_active_ = paint_as_active;
}
// Get/Set client_view property.
ClientView* client_view() const { return client_view_; }
void set_client_view(ClientView* client_view) {
client_view_ = client_view;
}
// NonClientView, View overrides:
virtual gfx::Size GetPreferredSize();
virtual void Layout();
protected:
// NonClientView, View overrides:
virtual void ViewHierarchyChanged(bool is_add, View* parent, View* child);
// Helper for non-client view implementations to determine which area of the
// window border the specified |point| falls within. The other parameters are
// the size of the sizing edges, and whether or not the window can be
// resized.
int GetHTComponentForFrame(const gfx::Point& point,
int top_resize_border_height,
int resize_border_thickness,
int top_resize_corner_height,
int resize_corner_width,
bool can_resize);
// Accessor for paint_as_active_.
bool paint_as_active() const { return paint_as_active_; }
private:
// A ClientView object or subclass, responsible for sizing the contents view
// of the window, hit testing and perhaps other tasks depending on the
// implementation.
ClientView* client_view_;
// True when the non-client view should always be rendered as if the window
// were active, regardless of whether or not the top level window actually
// is active.
bool paint_as_active_;
};
} // namespace views
#endif // #ifndef CHROME_VIEWS_NON_CLIENT_VIEW_H_
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