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// 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.
#include <memory>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/views/controls/button/button.h"
#include "ui/views/window/frame_buttons.h"
#include "ui/views/window/non_client_view.h"
namespace gfx {
class FontList;
namespace views {
class FrameBackground;
class ImageButton;
class Widget;
// CustomFrameView
// A view that provides the non client frame for Windows. This means
// rendering the non-standard window caption, border, and controls.
class VIEWS_EXPORT CustomFrameView : public NonClientFrameView,
public ButtonListener {
~CustomFrameView() override;
void Init(Widget* frame);
// Overridden from NonClientFrameView:
gfx::Rect GetBoundsForClientView() const override;
gfx::Rect GetWindowBoundsForClientBounds(
const gfx::Rect& client_bounds) const override;
int NonClientHitTest(const gfx::Point& point) override;
void GetWindowMask(const gfx::Size& size, SkPath* window_mask) override;
void ResetWindowControls() override;
void UpdateWindowIcon() override;
void UpdateWindowTitle() override;
void SizeConstraintsChanged() override;
void PaintAsActiveChanged(bool active) override;
// Overridden from View:
void OnPaint(gfx::Canvas* canvas) override;
void Layout() override;
gfx::Size CalculatePreferredSize() const override;
gfx::Size GetMinimumSize() const override;
gfx::Size GetMaximumSize() const override;
// Overridden from ButtonListener:
void ButtonPressed(Button* sender, const ui::Event& event) override;
// Returns the font list to use in the window's title bar.
// TODO( Move this into the typography provider.
static gfx::FontList GetWindowTitleFontList();
friend class CustomFrameViewTest;
// Returns the thickness of the border that makes up the window frame edges.
// This does not include any client edge.
int FrameBorderThickness() const;
// Returns the thickness of the entire nonclient left, right, and bottom
// borders, including both the window frame and any client edge.
int NonClientBorderThickness() const;
// Returns the height of the entire nonclient top border, including the window
// frame, any title area, and any connected client edge.
int NonClientTopBorderHeight() const;
// Returns the y-coordinate of the caption buttons.
int CaptionButtonY() const;
// Returns the thickness of the nonclient portion of the 3D edge along the
// bottom of the titlebar.
int TitlebarBottomThickness() const;
// Returns the size of the titlebar icon. This is used even when the icon is
// not shown, e.g. to set the titlebar height.
int IconSize() const;
// Returns the bounds of the titlebar icon (or where the icon would be if
// there was one).
gfx::Rect IconBounds() const;
// Returns true if the title bar, caption buttons, and frame border should be
// drawn. If false, the client view occupies the full area of this view.
bool ShouldShowTitleBarAndBorder() const;
// Returns true if the client edge should be drawn. This is true if
// the window is not maximized.
bool ShouldShowClientEdge() const;
// Paint various sub-components of this view.
void PaintRestoredFrameBorder(gfx::Canvas* canvas);
void PaintMaximizedFrameBorder(gfx::Canvas* canvas);
void PaintTitleBar(gfx::Canvas* canvas);
void PaintRestoredClientEdge(gfx::Canvas* canvas);
// Compute aspects of the frame needed to paint the frame background.
SkColor GetFrameColor() const;
gfx::ImageSkia GetFrameImage() const;
// Performs the layout for the window control buttons based on the
// configuration specified in WindowButtonOrderProvider. The sizing and
// positions of the buttons affects LayoutTitleBar, call this beforehand.
void LayoutWindowControls();
// Calculations depend on the positions of the window controls. Always call
// LayoutWindowControls beforehand.
void LayoutTitleBar();
void LayoutClientView();
// Creates, adds and returns a new window caption button (e.g, minimize,
// maximize, restore).
ImageButton* InitWindowCaptionButton(int accessibility_string_id,
int normal_image_id,
int hot_image_id,
int pushed_image_id);
// Returns the window caption button for the given FrameButton type, if it
// should be visible. Otherwise NULL.
ImageButton* GetImageButton(views::FrameButton button);
// The bounds of the client view, in this view's coordinates.
gfx::Rect client_view_bounds_;
// The layout rect of the title, if visible.
gfx::Rect title_bounds_;
// Not owned.
Widget* frame_ = nullptr;
// The icon of this window. May be NULL.
ImageButton* window_icon_ = nullptr;
// Window caption buttons.
ImageButton* minimize_button_ = nullptr;
ImageButton* maximize_button_ = nullptr;
ImageButton* restore_button_ = nullptr;
ImageButton* close_button_ = nullptr;
// Background painter for the window frame.
std::unique_ptr<FrameBackground> frame_background_;
// The horizontal boundaries for the title bar to layout within. Restricted
// by the space used by the leading and trailing buttons.
int minimum_title_bar_x_ = 0;
int maximum_title_bar_x_ = -1;
} // namespace views