Move controls into their own dir under chrome/views/controls

TBR=sky

Review URL: http://codereview.chromium.org/48058

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@11841 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 166 insertions, 0 deletions

diff --git a/chrome/views/controls/combo_box.cc b/chrome/views/controls/combo_box.cc
new file mode 100644
index 0000000..0c063ac
--- /dev/null
+++ b/chrome/views/controls/combo_box.cc
@@ -0,0 +1,166 @@
+// 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.
+
+#include "chrome/views/controls/combo_box.h"
+
+#include "base/gfx/native_theme.h"
+#include "base/gfx/rect.h"
+#include "chrome/common/gfx/chrome_canvas.h"
+#include "chrome/common/gfx/chrome_font.h"
+#include "chrome/common/l10n_util.h"
+#include "chrome/common/resource_bundle.h"
+
+// Limit how small a combobox can be.
+static const int kMinComboboxWidth = 148;
+
+// Add a couple extra pixels to the widths of comboboxes and combobox
+// dropdowns so that text isn't too crowded.
+static const int kComboboxExtraPaddingX = 6;
+
+namespace views {
+
+ComboBox::ComboBox(Model* model)
+    : model_(model), selected_item_(0), listener_(NULL), content_width_(0) {
+}
+
+ComboBox::~ComboBox() {
+}
+
+void ComboBox::SetListener(Listener* listener) {
+  listener_ = listener;
+}
+
+gfx::Size ComboBox::GetPreferredSize() {
+  HWND hwnd = GetNativeControlHWND();
+  if (!hwnd)
+    return gfx::Size();
+
+  COMBOBOXINFO cbi;
+  memset(reinterpret_cast<unsigned char*>(&cbi), 0, sizeof(cbi));
+  cbi.cbSize = sizeof(cbi);
+  // Note: Don't use CB_GETCOMBOBOXINFO since that crashes on WOW64 systems
+  // when you have a global message hook installed.
+  GetComboBoxInfo(hwnd, &cbi);
+  gfx::Rect rect_item(cbi.rcItem);
+  gfx::Rect rect_button(cbi.rcButton);
+  gfx::Size border = gfx::NativeTheme::instance()->GetThemeBorderSize(
+      gfx::NativeTheme::MENULIST);
+
+  // The padding value of '3' is the xy offset from the corner of the control
+  // to the corner of rcItem.  It does not seem to be queryable from the theme.
+  // It is consistent on all versions of Windows from 2K to Vista, and is
+  // invariant with respect to the combobox border size.  We could conceivably
+  // get this number from rect_item.x, but it seems fragile to depend on
+  // position here, inside of the layout code.
+  const int kItemOffset = 3;
+  int item_to_button_distance = std::max(kItemOffset - border.width(), 0);
+
+  // The cx computation can be read as measuring from left to right.
+  int pref_width = std::max(kItemOffset + content_width_ +
+                                kComboboxExtraPaddingX +
+                                item_to_button_distance + rect_button.width() +
+                                 border.width(), kMinComboboxWidth);
+  // The two arguments to ::max below should be typically be equal.
+  int pref_height = std::max(rect_item.height() + 2 * kItemOffset,
+                             rect_button.height() + 2 * border.height());
+  return gfx::Size(pref_width, pref_height);
+}
+
+HWND ComboBox::CreateNativeControl(HWND parent_container) {
+  HWND r = ::CreateWindowEx(GetAdditionalExStyle(), L"COMBOBOX", L"",
+                            WS_CHILD | WS_VSCROLL | CBS_DROPDOWNLIST,
+                            0, 0, width(), height(),
+                            parent_container, NULL, NULL, NULL);
+  HFONT font = ResourceBundle::GetSharedInstance().
+      GetFont(ResourceBundle::BaseFont).hfont();
+  SendMessage(r, WM_SETFONT, reinterpret_cast<WPARAM>(font), FALSE);
+  UpdateComboBoxFromModel(r);
+  return r;
+}
+
+LRESULT ComboBox::OnCommand(UINT code, int id, HWND source) {
+  HWND hwnd = GetNativeControlHWND();
+  if (!hwnd)
+    return 0;
+
+  if (code == CBN_SELCHANGE && source == hwnd) {
+    LRESULT r = ::SendMessage(hwnd, CB_GETCURSEL, 0, 0);
+    if (r != CB_ERR) {
+      int prev_selected_item = selected_item_;
+      selected_item_ = static_cast<int>(r);
+      if (listener_)
+        listener_->ItemChanged(this, prev_selected_item, selected_item_);
+    }
+  }
+  return 0;
+}
+
+LRESULT ComboBox::OnNotify(int w_param, LPNMHDR l_param) {
+  return 0;
+}
+
+void ComboBox::UpdateComboBoxFromModel(HWND hwnd) {
+  ::SendMessage(hwnd, CB_RESETCONTENT, 0, 0);
+  ChromeFont font = ResourceBundle::GetSharedInstance().GetFont(
+      ResourceBundle::BaseFont);
+  int max_width = 0;
+  int num_items = model_->GetItemCount(this);
+  for (int i = 0; i < num_items; ++i) {
+    const std::wstring& text = model_->GetItemAt(this, i);
+
+    // Inserting the Unicode formatting characters if necessary so that the
+    // text is displayed correctly in right-to-left UIs.
+    std::wstring localized_text;
+    const wchar_t* text_ptr = text.c_str();
+    if (l10n_util::AdjustStringForLocaleDirection(text, &localized_text))
+      text_ptr = localized_text.c_str();
+
+    ::SendMessage(hwnd, CB_ADDSTRING, 0, reinterpret_cast<LPARAM>(text_ptr));
+    max_width = std::max(max_width, font.GetStringWidth(text));
+
+  }
+  content_width_ = max_width;
+
+  if (num_items > 0) {
+    ::SendMessage(hwnd, CB_SETCURSEL, selected_item_, 0);
+
+    // Set the width for the drop down while accounting for the scrollbar and
+    // borders.
+    if (num_items > ComboBox_GetMinVisible(hwnd))
+      max_width += ::GetSystemMetrics(SM_CXVSCROLL);
+    // SM_CXEDGE would not be correct here, since the dropdown is flat, not 3D.
+    int kComboboxDropdownBorderSize = 1;
+    max_width += 2 * kComboboxDropdownBorderSize + kComboboxExtraPaddingX;
+    ::SendMessage(hwnd, CB_SETDROPPEDWIDTH, max_width, 0);
+  }
+}
+
+void ComboBox::ModelChanged() {
+  HWND hwnd = GetNativeControlHWND();
+  if (!hwnd)
+    return;
+  selected_item_ = std::min(0, model_->GetItemCount(this));
+  UpdateComboBoxFromModel(hwnd);
+}
+
+void ComboBox::SetSelectedItem(int index) {
+  selected_item_ = index;
+  HWND hwnd = GetNativeControlHWND();
+  if (!hwnd)
+    return;
+
+  // Note that we use CB_SETCURSEL and not CB_SELECTSTRING because on RTL
+  // locales the strings we get from our ComboBox::Model might be augmented
+  // with Unicode directionality marks before we insert them into the combo box
+  // and therefore we can not assume that the string we get from
+  // ComboBox::Model can be safely searched for and selected (which is what
+  // CB_SELECTSTRING does).
+  ::SendMessage(hwnd, CB_SETCURSEL, selected_item_, 0);
+}
+
+int ComboBox::GetSelectedItem() {
+  return selected_item_;
+}
+
+}  // namespace views