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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "views/controls/combobox/native_combobox_win.h" | |
| 6 | |
| 7 #include "base/i18n/rtl.h" | |
| 8 #include "base/utf_string_conversions.h" | |
| 9 #include "ui/base/models/combobox_model.h" | |
| 10 #include "ui/base/resource/resource_bundle.h" | |
| 11 #include "ui/base/win/hwnd_util.h" | |
| 12 #include "ui/gfx/font.h" | |
| 13 #include "ui/gfx/native_theme_win.h" | |
| 14 #include "ui/views/widget/widget.h" | |
| 15 #include "views/controls/combobox/combobox.h" | |
| 16 #include "views/controls/combobox/native_combobox_views.h" | |
| 17 | |
| 18 namespace views { | |
| 19 | |
| 20 // Limit how small a combobox can be. | |
| 21 static const int kMinComboboxWidth = 148; | |
| 22 | |
| 23 // Add a couple extra pixels to the widths of comboboxes and combobox | |
| 24 // dropdowns so that text isn't too crowded. | |
| 25 static const int kComboboxExtraPaddingX = 6; | |
| 26 | |
| 27 //////////////////////////////////////////////////////////////////////////////// | |
| 28 // NativeComboboxWin, public: | |
| 29 | |
| 30 NativeComboboxWin::NativeComboboxWin(Combobox* combobox) | |
| 31 : combobox_(combobox), | |
| 32 content_width_(0) { | |
| 33 // Associates the actual HWND with the combobox so it is the one considered as | |
| 34 // having the focus (not the wrapper) when the HWND is focused directly (with | |
| 35 // a click for example). | |
| 36 set_focus_view(combobox); | |
| 37 } | |
| 38 | |
| 39 NativeComboboxWin::~NativeComboboxWin() { | |
| 40 } | |
| 41 | |
| 42 //////////////////////////////////////////////////////////////////////////////// | |
| 43 // NativeComboboxWin, NativeComboboxWrapper implementation: | |
| 44 | |
| 45 void NativeComboboxWin::UpdateFromModel() { | |
| 46 SendMessage(native_view(), CB_RESETCONTENT, 0, 0); | |
| 47 gfx::Font font = ResourceBundle::GetSharedInstance().GetFont( | |
| 48 ResourceBundle::BaseFont); | |
| 49 int max_width = 0; | |
| 50 int num_items = combobox_->model()->GetItemCount(); | |
| 51 for (int i = 0; i < num_items; ++i) { | |
| 52 string16 text = combobox_->model()->GetItemAt(i); | |
| 53 | |
| 54 // Inserting the Unicode formatting characters if necessary so that the | |
| 55 // text is displayed correctly in right-to-left UIs. | |
| 56 base::i18n::AdjustStringForLocaleDirection(&text); | |
| 57 | |
| 58 SendMessage(native_view(), CB_ADDSTRING, 0, | |
| 59 reinterpret_cast<LPARAM>(UTF16ToWide(text).c_str())); | |
| 60 max_width = std::max(max_width, font.GetStringWidth(text)); | |
| 61 } | |
| 62 content_width_ = max_width; | |
| 63 | |
| 64 if (num_items > 0) { | |
| 65 SendMessage(native_view(), CB_SETCURSEL, combobox_->selected_item(), 0); | |
| 66 | |
| 67 // Set the width for the drop down while accounting for the scrollbar and | |
| 68 // borders. | |
| 69 if (num_items > ComboBox_GetMinVisible(native_view())) | |
| 70 max_width += GetSystemMetrics(SM_CXVSCROLL); | |
| 71 // SM_CXEDGE would not be correct here, since the dropdown is flat, not 3D. | |
| 72 int kComboboxDropdownBorderSize = 1; | |
| 73 max_width += 2 * kComboboxDropdownBorderSize + kComboboxExtraPaddingX; | |
| 74 SendMessage(native_view(), CB_SETDROPPEDWIDTH, max_width, 0); | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 void NativeComboboxWin::UpdateSelectedItem() { | |
| 79 // Note that we use CB_SETCURSEL and not CB_SELECTSTRING because on RTL | |
| 80 // locales the strings we get from our ComboBox::Model might be augmented | |
| 81 // with Unicode directionality marks before we insert them into the combo box | |
| 82 // and therefore we can not assume that the string we get from | |
| 83 // ComboBox::Model can be safely searched for and selected (which is what | |
| 84 // CB_SELECTSTRING does). | |
| 85 SendMessage(native_view(), CB_SETCURSEL, combobox_->selected_item(), 0); | |
| 86 } | |
| 87 | |
| 88 void NativeComboboxWin::UpdateEnabled() { | |
| 89 SetEnabled(combobox_->IsEnabled()); | |
| 90 } | |
| 91 | |
| 92 int NativeComboboxWin::GetSelectedItem() const { | |
| 93 LRESULT selected_item = SendMessage(native_view(), CB_GETCURSEL, 0, 0); | |
| 94 return selected_item != CB_ERR ? selected_item : -1; | |
| 95 } | |
| 96 | |
| 97 bool NativeComboboxWin::IsDropdownOpen() const { | |
| 98 return SendMessage(native_view(), CB_GETDROPPEDSTATE, 0, 0) != 0; | |
| 99 } | |
| 100 | |
| 101 gfx::Size NativeComboboxWin::GetPreferredSize() { | |
| 102 COMBOBOXINFO cbi = { 0 }; | |
| 103 cbi.cbSize = sizeof(cbi); | |
| 104 // Note: Don't use CB_GETCOMBOBOXINFO since that crashes on WOW64 systems | |
| 105 // when you have a global message hook installed. | |
| 106 GetComboBoxInfo(native_view(), &cbi); | |
| 107 gfx::Rect rect_item(cbi.rcItem); | |
| 108 gfx::Rect rect_button(cbi.rcButton); | |
| 109 gfx::Size border = gfx::NativeThemeWin::instance()->GetThemeBorderSize( | |
| 110 gfx::NativeThemeWin::MENULIST); | |
| 111 | |
| 112 // The padding value of '3' is the xy offset from the corner of the control | |
| 113 // to the corner of rcItem. It does not seem to be queryable from the theme. | |
| 114 // It is consistent on all versions of Windows from 2K to Vista, and is | |
| 115 // invariant with respect to the combobox border size. We could conceivably | |
| 116 // get this number from rect_item.x, but it seems fragile to depend on | |
| 117 // position here, inside of the layout code. | |
| 118 const int kItemOffset = 3; | |
| 119 int item_to_button_distance = std::max(kItemOffset - border.width(), 0); | |
| 120 | |
| 121 // The cx computation can be read as measuring from left to right. | |
| 122 int pref_width = std::max(kItemOffset + content_width_ + | |
| 123 kComboboxExtraPaddingX + | |
| 124 item_to_button_distance + rect_button.width() + | |
| 125 border.width(), kMinComboboxWidth); | |
| 126 // The two arguments to ::max below should be typically be equal. | |
| 127 int pref_height = std::max(rect_item.height() + 2 * kItemOffset, | |
| 128 rect_button.height() + 2 * border.height()); | |
| 129 return gfx::Size(pref_width, pref_height); | |
| 130 } | |
| 131 | |
| 132 View* NativeComboboxWin::GetView() { | |
| 133 return this; | |
| 134 } | |
| 135 | |
| 136 void NativeComboboxWin::SetFocus() { | |
| 137 OnFocus(); | |
| 138 } | |
| 139 | |
| 140 bool NativeComboboxWin::HandleKeyPressed(const views::KeyEvent& event) { | |
| 141 return false; | |
| 142 } | |
| 143 | |
| 144 bool NativeComboboxWin::HandleKeyReleased(const views::KeyEvent& event) { | |
| 145 return false; | |
| 146 } | |
| 147 | |
| 148 void NativeComboboxWin::HandleFocus() { | |
| 149 } | |
| 150 | |
| 151 void NativeComboboxWin::HandleBlur() { | |
| 152 } | |
| 153 | |
| 154 gfx::NativeView NativeComboboxWin::GetTestingHandle() const { | |
| 155 return native_view(); | |
| 156 } | |
| 157 | |
| 158 //////////////////////////////////////////////////////////////////////////////// | |
| 159 // NativeComboboxWin, NativeControlWin overrides: | |
| 160 | |
| 161 bool NativeComboboxWin::ProcessMessage(UINT message, | |
| 162 WPARAM w_param, | |
| 163 LPARAM l_param, | |
| 164 LRESULT* result) { | |
| 165 if (message == WM_COMMAND && HIWORD(w_param) == CBN_SELCHANGE) { | |
| 166 combobox_->SelectionChanged(); | |
| 167 *result = 0; | |
| 168 return true; | |
| 169 } | |
| 170 return NativeControlWin::ProcessMessage(message, w_param, l_param, result); | |
| 171 } | |
| 172 | |
| 173 void NativeComboboxWin::CreateNativeControl() { | |
| 174 // It's ok to add WS_VSCROLL. The scrollbar will show up only when necessary | |
| 175 // as long as we don't use CBS_DISABLENOSCROLL. | |
| 176 // See http://msdn.microsoft.com/en-us/library/7h63bxbe(VS.80).aspx | |
| 177 DWORD flags = WS_CHILD | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | | |
| 178 CBS_DROPDOWNLIST | WS_VSCROLL; | |
| 179 HWND control_hwnd = ::CreateWindowEx(GetAdditionalExStyle(), L"COMBOBOX", L"", | |
| 180 flags, 0, 0, width(), height(), | |
| 181 GetWidget()->GetNativeView(), NULL, NULL, | |
| 182 NULL); | |
| 183 ui::CheckWindowCreated(control_hwnd); | |
| 184 NativeControlCreated(control_hwnd); | |
| 185 } | |
| 186 | |
| 187 void NativeComboboxWin::NativeControlCreated(HWND native_control) { | |
| 188 NativeControlWin::NativeControlCreated(native_control); | |
| 189 | |
| 190 UpdateFont(); | |
| 191 UpdateFromModel(); | |
| 192 UpdateSelectedItem(); | |
| 193 } | |
| 194 | |
| 195 //////////////////////////////////////////////////////////////////////////////// | |
| 196 // NativeComboboxWin, private: | |
| 197 | |
| 198 void NativeComboboxWin::UpdateFont() { | |
| 199 HFONT font = ResourceBundle::GetSharedInstance(). | |
| 200 GetFont(ResourceBundle::BaseFont).GetNativeFont(); | |
| 201 SendMessage(native_view(), WM_SETFONT, reinterpret_cast<WPARAM>(font), FALSE); | |
| 202 } | |
| 203 | |
| 204 //////////////////////////////////////////////////////////////////////////////// | |
| 205 // NativeComboboxWrapper, public: | |
| 206 | |
| 207 // static | |
| 208 NativeComboboxWrapper* NativeComboboxWrapper::CreateWrapper( | |
| 209 Combobox* combobox) { | |
| 210 if (Widget::IsPureViews()) | |
| 211 return new NativeComboboxViews(combobox); | |
| 212 return new NativeComboboxWin(combobox); | |
| 213 } | |
| 214 | |
| 215 } // namespace views | |
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Chromium Code Reviews
Issue 8682011:
views: Move combobox directory to ui/views/controls/. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src