Add chrome to the repository.

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

1 files changed, 204 insertions, 0 deletions

diff --git a/chrome/views/button_dropdown.cc b/chrome/views/button_dropdown.cc
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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.
+
+#include "chrome/views/button_dropdown.h"
+
+#include "base/message_loop.h"
+#include "chrome/browser/back_forward_menu_model.h"
+#include "chrome/common/l10n_util.h"
+#include "chrome/views/view_menu_delegate.h"
+#include "chrome/views/view_container.h"
+
+#include "generated_resources.h"
+
+namespace ChromeViews {
+
+// How long to wait before showing the menu
+static const int kMenuTimerDelay = 500;
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// ButtonDropDown - constructors, destructors, initialization, cleanup
+//
+////////////////////////////////////////////////////////////////////////////////
+
+ButtonDropDown::ButtonDropDown(Menu::Delegate* menu_delegate)
+  : Button(),
+    menu_delegate_(menu_delegate),
+    y_position_on_lbuttondown_(0),
+    show_menu_factory_(this) {
+}
+
+ButtonDropDown::~ButtonDropDown() {
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// ButtonDropDown - Events
+//
+////////////////////////////////////////////////////////////////////////////////
+
+bool ButtonDropDown::OnMousePressed(const ChromeViews::MouseEvent& e) {
+  if (IsEnabled() && e.IsLeftMouseButton() && HitTest(e.GetLocation())) {
+    // Store the y pos of the mouse coordinates so we can use them later to
+    // determine if the user dragged the mouse down (which should pop up the
+    // drag down menu immediately, instead of waiting for the timer)
+    y_position_on_lbuttondown_ = e.GetY();
+
+    // Schedule a task that will show the menu.
+    MessageLoop::current()->PostDelayedTask(FROM_HERE,
+        show_menu_factory_.NewRunnableMethod(&ButtonDropDown::ShowDropDownMenu,
+                                             GetViewContainer()->GetHWND()),
+        kMenuTimerDelay);
+  }
+
+  return Button::OnMousePressed(e);
+}
+
+void ButtonDropDown::OnMouseReleased(const ChromeViews::MouseEvent& e,
+                                     bool canceled) {
+  Button::OnMouseReleased(e, canceled);
+
+  if (canceled)
+    return;
+
+  if (e.IsLeftMouseButton())
+    show_menu_factory_.RevokeAll();
+
+  if (IsEnabled() && e.IsRightMouseButton() && HitTest(e.GetLocation())) {
+    show_menu_factory_.RevokeAll();
+    // Make the button look depressed while the menu is open.
+    // NOTE: SetState() schedules a paint, but it won't occur until after the
+    //       context menu message loop has terminated, so we PaintNow() to
+    //       update the appearance synchronously.
+    SetState(BS_PUSHED);
+    PaintNow();
+    ShowDropDownMenu(GetViewContainer()->GetHWND());
+  }
+}
+
+bool ButtonDropDown::OnMouseDragged(const ChromeViews::MouseEvent& e) {
+  bool result = Button::OnMouseDragged(e);
+
+  if (!show_menu_factory_.empty()) {
+    // SM_CYDRAG is a pixel value for minimum dragging distance before operation
+    // counts as a drag, and not just as a click and accidental move of a mouse.
+    // See http://msdn2.microsoft.com/en-us/library/ms724385.aspx for details.
+    int dragging_threshold = GetSystemMetrics(SM_CYDRAG);
+
+    // If the mouse is dragged to a y position lower than where it was when
+    // clicked then we should not wait for the menu to appear but show
+    // it immediately.
+    if (e.GetY() > y_position_on_lbuttondown_ + dragging_threshold) {
+      show_menu_factory_.RevokeAll();
+      ShowDropDownMenu(GetViewContainer()->GetHWND());
+    }
+  }
+
+  return result;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// ButtonDropDown - Menu functions
+//
+////////////////////////////////////////////////////////////////////////////////
+
+void ButtonDropDown::ShowDropDownMenu(HWND window) {
+  if (menu_delegate_) {
+    CRect lb;
+    GetLocalBounds(&lb, true);
+
+    // Both the menu position and the menu anchor type change if the UI layout
+    // is right-to-left.
+    CPoint menu_position = CPoint(lb.TopLeft());
+    menu_position.Offset(0, lb.Height() - 1);
+    if (UILayoutIsRightToLeft())
+      menu_position.Offset(lb.Width() - 1, 0);
+
+    Menu::AnchorPoint anchor = Menu::TOPLEFT;
+    if (UILayoutIsRightToLeft())
+      anchor = Menu::TOPRIGHT;
+
+    View::ConvertPointToScreen(this, &menu_position);
+    Menu menu(menu_delegate_, anchor, window);
+
+    // ID's for AppendMenu is 1-based because RunMenu will ignore the user
+    // selection if id=0 is selected (0 = NO-OP) so we add 1 here and subtract 1
+    // in the handlers above to get the actual index
+    int item_count = menu_delegate_->GetItemCount();
+    for (int i = 0; i < item_count; i++) {
+      if (menu_delegate_->IsItemSeparator(i + 1)) {
+        menu.AppendSeparator();
+      } else {
+        if (menu_delegate_->HasIcon(i + 1))
+          menu.AppendMenuItemWithIcon(i + 1, L"", SkBitmap());
+        else
+          menu.AppendMenuItem(i+1, L"", Menu::NORMAL);
+      }
+    }
+
+    menu.RunMenuAt(menu_position.x, menu_position.y);
+
+    // Need to explicitly clear mouse handler so that events get sent
+    // properly after the menu finishes running. If we don't do this, then
+    // the first click to other parts of the UI is eaten.
+    SetMouseHandler(NULL);
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// ButtonDropDown - Accessibility
+//
+////////////////////////////////////////////////////////////////////////////////
+
+bool ButtonDropDown::GetAccessibleDefaultAction(std::wstring* action) {
+  DCHECK(action);
+
+  action->assign(l10n_util::GetString(IDS_ACCACTION_PRESS));
+  return true;
+}
+
+bool ButtonDropDown::GetAccessibleRole(VARIANT* role) {
+  DCHECK(role);
+
+  role->vt = VT_I4;
+  role->lVal = ROLE_SYSTEM_BUTTONDROPDOWN;
+  return true;
+}
+
+bool ButtonDropDown::GetAccessibleState(VARIANT* state) {
+  DCHECK(state);
+
+  state->lVal |= STATE_SYSTEM_HASPOPUP;
+  return true;
+}
+
+}  // namespace ChromeViews