Shamusworld >> Repos - apple2/blob - src/gui/textedit.cpp

   1 //
   2 // TEXTEDIT.CPP
   3 //
   4 // Graphical User Interface button class
   5 // by James L. Hammons
   6 //
   7 // JLH = James L. Hammons <jlhamm@acm.org>
   8 //
   9 // WHO  WHEN        WHAT
  10 // ---  ----------  ------------------------------------------------------------
  11 // JLH  02/17/2006  Created this file
  12 // JLH  03/01/2006  Added basic editing functionality
  13 //
  14
  15 #include "textedit.h"
  16 #include "guimisc.h"                                                            // Various support functions
  17
  18 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
  19 #define MASK_R 0xFF000000
  20 #define MASK_G 0x00FF0000
  21 #define MASK_B 0x0000FF00
  22 #define MASK_A 0x000000FF
  23 #else
  24 #define MASK_R 0x000000FF
  25 #define MASK_G 0x0000FF00
  26 #define MASK_B 0x00FF0000
  27 #define MASK_A 0xFF000000
  28 #endif
  29
  30 //
  31 // Text edit class implementation
  32 //
  33
  34 TextEdit::TextEdit(uint32 x/*= 0*/, uint32 y/*= 0*/, uint32 w/*= 0*/, uint32 h/*= 0*/,
  35         std::string s/*= ""*/, Element * parent/*= NULL*/):
  36         Element(x, y, w, h, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x40, 0x40, 0xFF, parent),
  37         activated(false), clicked(false), inside(false),
  38         img(NULL), text(s), caretPos(0), scrollPos(0),
  39         activatedSave(false), clickedSave(false), insideSave(false),
  40         caretPosSave(0), scrollPosSave(0)
  41 {
  42         if (extents.h == 0)
  43                 extents.h = GetFontHeight();
  44
  45         // Setup hardwired colors...
  46
  47         uint8 * c = (uint8 *)&hiliteColor;
  48         c[0] = 0xFF, c[1] = 0x80, c[2] = 0x00, c[3] = 0xFF;
  49         c = (uint8 *)&cursorColor;
  50         c[0] = 0x40, c[1] = 0xFF, c[2] = 0x60, c[3] = 0xFF;
  51
  52         // Create the text edit surface here...
  53
  54         img = SDL_CreateRGBSurface(SDL_SWSURFACE, extents.w, extents.h, 32,
  55                 MASK_R, MASK_G, MASK_B, MASK_A);
  56
  57         Draw(); // Can we do this in the constructor??? Mebbe.
  58 }
  59
  60 TextEdit::~TextEdit()
  61 {
  62         if (img)
  63                 SDL_FreeSurface(img);
  64 }
  65
  66 //Set different filters depending on type passed in on construction, e.g., filename, amount, etc...?
  67 void TextEdit::HandleKey(SDLKey key)
  68 {
  69         if (!activated)
  70                 return;
  71
  72         SaveStateVariables();
  73         SDLMod keyMod = SDL_GetModState();
  74
  75         if ((key >= SDLK_a && key <= SDLK_z) || (key >= SDLK_0 && key <= SDLK_9)
  76                 || key == SDLK_PERIOD || key == SDLK_SLASH || key == SDLK_SPACE)
  77         {
  78                 uint8 chr = (uint8)key;
  79
  80                 // Handle shift key as well...
  81                 if (keyMod & KMOD_SHIFT)
  82                 {
  83                         if (key >= SDLK_a && key <= SDLK_z)
  84                                 chr &= 0xDF;                                    // Set to upper case
  85                 }
  86
  87                 text.insert(scrollPos + caretPos, 1, chr);
  88
  89                 // If we hit the edge, then scroll; else advance the caret
  90                 if ((GetFontWidth() * caretPos) > (extents.w - GetFontWidth()))
  91                         scrollPos++;
  92                 else
  93                         caretPos++;
  94         }
  95         else if (key == SDLK_BACKSPACE)
  96         {
  97                 // If there's something to delete, go ahead and delete it
  98                 if ((scrollPos + caretPos) > 0)
  99                 {
 100                         text.erase(scrollPos + caretPos - 1, 1);
 101
 102                         // Scroll the cursor to the left if possible, otherwise move the scroll position
 103                         if (caretPos > 0)
 104                                 caretPos--;
 105                         else
 106                                 scrollPos--;
 107                 }
 108         }
 109         else if (key == SDLK_DELETE)
 110         {
 111                 if ((scrollPos + caretPos) < text.length())
 112                         text.erase(scrollPos + caretPos, 1);
 113         }
 114         else if (key == SDLK_LEFT)
 115         {
 116                 if (caretPos > 0)
 117                         caretPos--;
 118                 else if (scrollPos > 0)
 119                         scrollPos--;
 120         }
 121         else if (key == SDLK_RIGHT)
 122         {
 123                 if ((scrollPos + caretPos) < text.length())
 124                 {
 125                         if ((GetFontWidth() * caretPos) > (extents.w - GetFontWidth()))
 126                                 scrollPos++;
 127                         else
 128                                 caretPos++;
 129                 }
 130         }
 131         else if (key == SDLK_RETURN)
 132         {
 133                 clicked = activated = false;
 134         }
 135
 136         CheckStateAndRedrawIfNeeded();
 137 }
 138
 139 void TextEdit::HandleMouseMove(uint32 x, uint32 y)
 140 {
 141         SaveStateVariables();
 142         inside = Inside(x, y);
 143         CheckStateAndRedrawIfNeeded();
 144 }
 145
 146 void TextEdit::HandleMouseButton(uint32 x, uint32 y, bool mouseDown)
 147 {
 148         SaveStateVariables();
 149
 150 //Not sure that this is right way to handle this...
 151 //Should set the cursor position based on where in the text box it was clicked...
 152         if (inside)
 153         {
 154                 if (mouseDown)
 155                         clicked = true;
 156
 157                 if (clicked && !mouseDown)
 158                 {
 159                         clicked = false, activated = true;
 160
 161                         // Send a message to our parent widget (if any) that we're activated
 162                         if (parent)
 163                                 parent->Notify(this);
 164                 }
 165         }
 166         else
 167                 clicked = activated = false;
 168
 169         CheckStateAndRedrawIfNeeded();
 170 }
 171
 172 void TextEdit::Draw(void)
 173 {
 174         if (img == NULL)
 175                 return;                                                                 // Bail out if no surface was created...
 176
 177         SDL_Rect rect = GetScreenCoords();
 178
 179         // Now, draw the appropriate text state!
 180
 181         if (!activated)
 182         {
 183                 if (inside)
 184                 {
 185                         SDL_Rect rect2;
 186                         rect2.x = 1;
 187                         rect2.y = 1;
 188                         rect2.w = extents.w - 2;
 189                         rect2.h = extents.h - 2;
 190
 191                         SDL_FillRect(img, NULL, hiliteColor);
 192                         SDL_FillRect(img, &rect2, bgColor);
 193                 }
 194                 else
 195                         SDL_FillRect(img, NULL, bgColor);
 196         }
 197         else
 198                 SDL_FillRect(img, NULL, bgColor);//Make a different color here, so we're clear we're editing...
 199
 200 //Should also draw different text color depending on whether or not we're activated...
 201         if (activated)
 202                 DrawStringTrans(img, 0, 0, fgColor, text.c_str() + scrollPos);
 203         else
 204                 DrawStringTrans(img, 0, 0, fgColor, text.c_str());
 205
 206         // Draw the cursor, if any
 207
 208         if (activated)
 209         {
 210                 SDL_Rect rectCursor;
 211                 rectCursor.x = caretPos * GetFontWidth();
 212                 rectCursor.y = 0;
 213                 rectCursor.w = 2;
 214                 rectCursor.h = GetFontHeight();
 215
 216                 SDL_FillRect(img, &rectCursor, cursorColor);
 217         }
 218
 219         SDL_BlitSurface(img, NULL, screen, &rect);      // This handles alpha blending too! :-D
 220
 221         needToRefreshScreen = true;
 222 }
 223
 224 void TextEdit::Notify(Element *)
 225 {
 226 }
 227
 228 std::string TextEdit::GetText(void)
 229 {
 230         return text;
 231 }
 232
 233 void TextEdit::SaveStateVariables(void)
 234 {
 235         activatedSave = activated;
 236         clickedSave = clicked;
 237         insideSave = inside;
 238         caretPosSave = caretPos;
 239         scrollPosSave = scrollPos;
 240         lengthSave = text.length();
 241 }
 242
 243 void TextEdit::CheckStateAndRedrawIfNeeded(void)
 244 {
 245         // Check to see if any of our state variables changed since we last saved them...
 246         if (activated != activatedSave || clicked != clickedSave || inside != insideSave
 247                 || caretPos != caretPosSave || scrollPos != scrollPosSave
 248                 || text.length() != lengthSave)
 249                 Draw();
 250 }