src/Dialogs/Settings/FontEdit.cpp

   1 /*
   2 Copyright_License {
   3
   4   XCSoar Glide Computer - http://www.xcsoar.org/
   5   Copyright (C) 2000-2013 The XCSoar Project
   6   A detailed list of copyright holders can be found in the file "AUTHORS".
   7
   8   This program is free software; you can redistribute it and/or
   9   modify it under the terms of the GNU General Public License
  10   as published by the Free Software Foundation; either version 2
  11   of the License, or (at your option) any later version.
  12
  13   This program is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16   GNU General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with this program; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21 }
  22 */
  23
  24 #include "FontEdit.hpp"
  25 #include "Dialogs/WidgetDialog.hpp"
  26 #include "Look/DialogLook.hpp"
  27 #include "Widget/RowFormWidget.hpp"
  28 #include "Form/ActionListener.hpp"
  29 #include "Screen/Layout.hpp"
  30 #include "Screen/Font.hpp"
  31 #include "Screen/LargeTextWindow.hpp"
  32 #include "Form/DataField/Enum.hpp"
  33 #include "Form/DataField/Listener.hpp"
  34 #include "Util/StringUtil.hpp"
  35 #include "UIGlobals.hpp"
  36 #include "Language/Language.hpp"
  37 #include "Compiler.h"
  38
  39 #ifdef ENABLE_OPENGL
  40 #include "Screen/OpenGL/Cache.hpp"
  41 #endif
  42
  43 enum ControlIndex {
  44 #ifdef USE_GDI
  45   FACE,
  46 #endif
  47   HEIGHT,
  48   WEIGHT,
  49   ITALIC,
  50   PREVIEW,
  51 };
  52
  53 class FontEditWidget final
  54   : public RowFormWidget, public ActionListener, DataFieldListener
  55 {
  56   LOGFONT data;
  57   const LOGFONT &default_data;
  58
  59   Font font;
  60
  61 public:
  62   FontEditWidget(const LOGFONT &_data, const LOGFONT &_default_data)
  63     :RowFormWidget(UIGlobals::GetDialogLook()),
  64      data(_data), default_data(_default_data) {}
  65
  66   const LOGFONT &GetData() const {
  67     return data;
  68   }
  69
  70   void Load();
  71   void SaveValues();
  72   void UpdatePreview();
  73
  74   /* methods from Widget */
  75   virtual void Prepare(ContainerWindow &parent, const PixelRect &rc) override;
  76
  77   /* methods from ActionListener */
  78   virtual void OnAction(int id) override;
  79
  80 private:
  81   /* methods from DataFieldListener */
  82   virtual void OnModified(DataField &df) override;
  83 };
  84
  85 void
  86 FontEditWidget::Load()
  87 {
  88 #ifdef USE_GDI
  89   {
  90     DataFieldEnum &df = (DataFieldEnum &)GetDataField(FACE);
  91     df.SetStringAutoAdd(data.lfFaceName);
  92     GetControl(FACE).RefreshDisplay();
  93   }
  94 #endif
  95
  96   LoadValue(HEIGHT, (int)data.lfHeight);
  97   LoadValue(WEIGHT, data.lfWeight > 500);
  98   LoadValue(ITALIC, !!data.lfItalic);
  99
 100   UpdatePreview();
 101 }
 102
 103 inline void
 104 FontEditWidget::SaveValues()
 105 {
 106 #ifdef USE_GDI
 107   CopyString(data.lfFaceName, GetDataField(FACE).GetAsString(), LF_FACESIZE);
 108 #endif
 109
 110   data.lfHeight = GetValueInteger(HEIGHT);
 111   data.lfWeight = GetValueBoolean(WEIGHT) ? 700 : 500;
 112   data.lfItalic = GetValueBoolean(ITALIC);
 113 }
 114
 115 void
 116 FontEditWidget::UpdatePreview()
 117 {
 118   /* revert to default font first, to avoid freeing the Font while it
 119      is still being referenced */
 120   LargeTextWindow &preview = (LargeTextWindow &)GetGeneric(PREVIEW);
 121   preview.SetFont(*GetLook().text_font);
 122
 123   font.Load(data);
 124
 125 #ifdef ENABLE_OPENGL
 126   TextCache::Flush();
 127 #endif
 128
 129   if (font.IsDefined()) {
 130     preview.SetFont(font);
 131     preview.SetText(_T("Sample Text\n123"));
 132   } else {
 133     preview.SetText(_("Font not found."));
 134   }
 135 }
 136
 137 void
 138 FontEditWidget::Prepare(ContainerWindow &parent, const PixelRect &rc)
 139 {
 140   RowFormWidget::Prepare(parent, rc);
 141
 142 #ifdef USE_GDI
 143   WndProperty *wp = AddEnum(_("Font face"), NULL, this);
 144   {
 145     DataFieldEnum &df = *(DataFieldEnum *)wp->GetDataField();
 146     df.addEnumText(_T("Tahoma"));
 147     df.addEnumText(_T("TahomaBD"));
 148     df.addEnumText(_T("DejaVu Sans Condensed"));
 149   }
 150 #else
 151   /* we cannot obtain a list of fonts on SDL/OpenGL currently */
 152 #endif
 153
 154   AddInteger(_("Height"), NULL, _T("%d"), _T("%d"), 1, 200, 1, 0, this);
 155   AddBoolean(_("Bold"), NULL, false, this);
 156   AddBoolean(_("Italic"), NULL, false, this);
 157
 158   PixelRect preview_rc { 0, 0, Layout::Scale(250), Layout::Scale(100) };
 159   LargeTextWindowStyle preview_style;
 160   preview_style.Border();
 161   LargeTextWindow *preview = new LargeTextWindow();
 162   preview->Create(*(ContainerWindow *)GetWindow(), preview_rc, preview_style);
 163   Add(preview);
 164
 165   Load();
 166 }
 167
 168 void
 169 FontEditWidget::OnModified(DataField &df)
 170 {
 171   SaveValues();
 172   UpdatePreview();
 173 }
 174
 175 void
 176 FontEditWidget::OnAction(int id)
 177 {
 178   data = default_data;
 179   Load();
 180 }
 181
 182 bool
 183 dlgFontEditShowModal(const TCHAR *type, LOGFONT &data,
 184                      const LOGFONT &default_data)
 185 {
 186   StaticString<128> title;
 187   title.Format(_T("%s: %s"), _("Edit Font"), type);
 188
 189   FontEditWidget *widget =
 190     new FontEditWidget(data, default_data);
 191
 192   WidgetDialog dialog(UIGlobals::GetDialogLook());
 193   dialog.CreateAuto(UIGlobals::GetMainWindow(), title, widget);
 194   dialog.AddButton(_("OK"), mrOK);
 195   dialog.AddButton(_("Reset"), *widget, 1);
 196   dialog.AddButton(_("Cancel"), mrCancel);
 197
 198   if (dialog.ShowModal() != mrOK)
 199     return false;
 200
 201   data = widget->GetData();
 202   return true;
 203 }