Add chrome to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 200 insertions, 0 deletions

diff --git a/chrome/views/label.h b/chrome/views/label.h
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef CHROME_VIEWS_LABEL_H__
+#define CHROME_VIEWS_LABEL_H__
+
+#include "chrome/common/gfx/chrome_font.h"
+#include "chrome/views/view.h"
+#include "googleurl/src/gurl.h"
+#include "SkColor.h"
+
+namespace ChromeViews {
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Label class
+//
+// A label is a view subclass that can display a string.
+//
+/////////////////////////////////////////////////////////////////////////////
+class Label : public View {
+ public:
+  enum Alignment { ALIGN_LEFT = 0,
+                   ALIGN_CENTER,
+                   ALIGN_RIGHT };
+
+  // The view class name.
+  static const char kViewClassName[];
+
+  // Create a new label with a default font and empty value
+  Label();
+
+  // Create a new label with a default font
+  explicit Label(const std::wstring& text);
+
+  Label(const std::wstring& text, const ChromeFont& font);
+
+  virtual ~Label();
+
+  // Overridden to compute the size required to display this label
+  virtual void GetPreferredSize(CSize* out);
+
+  // Return the height necessary to display this label with the provided width.
+  // This method is used to layout multi-line labels. It is equivalent to
+  // GetPreferredSize().cy if the receiver is not multi-line
+  virtual int GetHeightForWidth(int w);
+
+  // Returns chrome/views/Label.
+  virtual std::string GetClassName() const;
+
+  // Overridden to paint
+  virtual void Paint(ChromeCanvas* canvas);
+
+  // If the mouse is over the label, and a mouse over background has been
+  // specified, its used. Otherwise super's implementation is invoked
+  virtual void PaintBackground(ChromeCanvas* canvas);
+
+  // Set the font.
+  void SetFont(const ChromeFont& font);
+
+  // Return the font used by this label
+  ChromeFont GetFont() const;
+
+  // Set the label text.
+  void SetText(const std::wstring& text);
+
+  // Return the label text.
+  const std::wstring GetText() const;
+
+  // Set URL Value - text_ is set to spec().
+  void SetURL(const GURL& url);
+
+  // Return the label URL.
+  const GURL GetURL() const;
+
+  // Set the color
+  virtual void SetColor(const SkColor& color);
+
+  // Return a reference to the currently used color
+  virtual const SkColor GetColor() const;
+
+  // Alignment
+  void SetHorizontalAlignment(Alignment a);
+  Alignment GetHorizontalAlignment() const;
+
+  // Set whether the label text can wrap on multiple lines.
+  // Default is false
+  void SetMultiLine(bool f);
+
+  // Return whether the label text can wrap on multiple lines
+  bool IsMultiLine();
+
+  // Sets the tooltip text.  Default behavior for a label (single-line) is to
+  // show the full text if it is wider than its bounds.  Calling this overrides
+  // the default behavior and lets you set a custom tooltip.  To revert to
+  // default behavior, call this with an empty string.
+  void SetTooltipText(const std::wstring& tooltip_text);
+
+  // Gets the tooltip text for labels that are wider than their bounds, except
+  // when the label is multiline, in which case it just returns false (no
+  // tooltip).  If a custom tooltip has been specified with SetTooltipText()
+  // it is returned instead.
+  virtual bool GetTooltipText(int x, int y, std::wstring* tooltip);
+
+  // Mouse enter/exit are overridden to render mouse over background color. These
+  // invoke SetContainsMouse as necessary.
+  virtual void OnMouseMoved(const MouseEvent& e);
+  virtual void OnMouseEntered(const MouseEvent& event);
+  virtual void OnMouseExited(const MouseEvent& event);
+
+  // The background color to use when the mouse is over the label. Label
+  // takes ownership of the Background.
+  void SetMouseOverBackground(Background* background);
+  const Background* GetMouseOverBackground() const;
+
+  // Sets the enabled state. Setting the enabled state resets the color.
+  virtual void SetEnabled(bool enabled);
+
+  // Resizes the label so its width is set to the width of the longest line and
+  // its height deduced accordingly.
+  // This is only intended for multi-line labels and is useful when the label's
+  // text contains several lines separated with \n.
+  // |max_width| is the maximum width that will be used (longer lines will be
+  // wrapped).  If 0, no maximum width is enforced.
+  void SizeToFit(int max_width);
+
+  // Returns the MSAA role of the current view. The role is what assistive
+  // technologies (ATs) use to determine what behavior to expect from a given
+  // control.
+  bool GetAccessibleRole(VARIANT* role);
+
+  // Returns a brief, identifying string, containing a unique, readable name.
+  bool GetAccessibleName(std::wstring* name);
+
+  // Returns the MSAA state of the current view. Sets the input VARIANT
+  // appropriately, and returns true if a change was performed successfully.
+  // Overriden from View.
+  virtual bool GetAccessibleState(VARIANT* state);
+
+ private:
+  static ChromeFont GetDefaultFont();
+
+  // If the mouse is over the text, SetContainsMouse(true) is invoked, otherwise
+  // SetContainsMouse(false) is invoked.
+  void Label::UpdateContainsMouse(const MouseEvent& event);
+
+  // Updates whether the mouse is contained in the Label. If the new value
+  // differs from the current value, and a mouse over background is specified,
+  // SchedulePaint is invoked.
+  void SetContainsMouse(bool contains_mouse);
+
+  // Returns where the text is drawn, in the receivers coordinate system.
+  gfx::Rect GetTextBounds();
+
+  int ComputeMultiLineFlags();
+  void GetTextSize(CSize* out);
+  void Init(const std::wstring& text, const ChromeFont& font);
+  std::wstring text_;
+  GURL url_;
+  ChromeFont font_;
+  SkColor color_;
+  CSize text_size_;
+  bool text_size_valid_;
+  bool is_multi_line_;
+  bool url_set_;
+  Alignment horiz_alignment_;
+  std::wstring tooltip_text_;
+  // Whether the mouse is over this label.
+  bool contains_mouse_;
+  scoped_ptr<Background> mouse_over_background_;
+};
+
+}
+#endif  // CHROME_VIEWS_VIEW_H__