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 using namespace std;                                                            // For STL stuff
  31
  32 //
  33 // Text edit class implementation
  34 //
  35
  36 TextEdit::TextEdit(uint32 x/*= 0*/, uint32 y/*= 0*/, uint32 w/*= 0*/, uint32 h/*= 0*/,
  37         string s/*= ""*/, Element * parent/*= NULL*/):
  38         Element(x, y, w, h, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x40, 0x40, 0xFF, parent),
  39         activated(false), clicked(false), inside(false),
  40         img(NULL), text(s), caretPos(0), scrollPos(0),
  41         activatedSave(false), clickedSave(false), insideSave(false),
  42         caretPosSave(0), scrollPosSave(0)
  43 {
  44         if (extents.h == 0)
  45                 extents.h = GetFontHeight();
  46
  47         // Setup hardwired colors...
  48
  49         uint8 * c = (uint8 *)&hiliteColor;
  50         c[0] = 0xFF, c[1] = 0x80, c[2] = 0x00, c[3] = 0xFF;
  51         c = (uint8 *)&cursorColor;
  52         c[0] = 0x40, c[1] = 0xFF, c[2] = 0x60, c[3] = 0xFF;
  53
  54         // Create the text edit surface here...
  55
  56         img = SDL_CreateRGBSurface(SDL_SWSURFACE, extents.w, extents.h, 32,
  57                 MASK_R, MASK_G, MASK_B, MASK_A);
  58
  59         Draw(); // Can we do this in the constructor??? Mebbe.
  60 }
  61
  62 TextEdit::~TextEdit()
  63 {
  64         if (img)
  65                 SDL_FreeSurface(img);
  66 }
  67
  68 //Set different filters depending on type passed in on construction, e.g., filename, amount, etc...?
  69 void TextEdit::HandleKey(SDLKey key)
  70 {
  71         if (!activated)
  72                 return;
  73
  74         SaveStateVariables();
  75         SDLMod keyMod = SDL_GetModState();
  76
  77         if ((key >= SDLK_a && key <= SDLK_z) || (key >= SDLK_0 && key <= SDLK_9)
  78                 || key == SDLK_PERIOD || key == SDLK_SLASH || key == SDLK_SPACE)
  79         {
  80                 uint8 chr = (uint8)key;
  81
  82                 // Handle shift key as well...
  83                 if (keyMod & KMOD_SHIFT)
  84                 {
  85                         if (key >= SDLK_a && key <= SDLK_z)
  86                                 chr &= 0xDF;                                    // Set to upper case
  87                 }
  88
  89                 text.insert(scrollPos + caretPos, 1, chr);
  90
  91                 // If we hit the edge, then scroll; else advance the caret
  92                 if ((GetFontWidth() * caretPos) > (extents.w - GetFontWidth()))
  93                         scrollPos++;
  94                 else
  95                         caretPos++;
  96         }
  97         else if (key == SDLK_BACKSPACE)
  98         {
  99                 // If there's something to delete, go ahead and delete it
 100                 if ((scrollPos + caretPos) > 0)
 101                 {
 102                         text.erase(scrollPos + caretPos - 1, 1);
 103
 104                         // Scroll the cursor to the left if possible, otherwise move the scroll position
 105                         if (caretPos > 0)
 106                                 caretPos--;
 107                         else
 108                                 scrollPos--;
 109                 }
 110         }
 111         else if (key == SDLK_DELETE)
 112         {
 113                 if ((scrollPos + caretPos) < text.length())
 114                         text.erase(scrollPos + caretPos, 1);
 115         }
 116         else if (key == SDLK_LEFT)
 117         {
 118                 if (caretPos > 0)
 119                         caretPos--;
 120                 else if (scrollPos > 0)
 121                         scrollPos--;
 122         }
 123         else if (key == SDLK_RIGHT)
 124         {
 125                 if ((scrollPos + caretPos) < text.length())
 126                 {
 127                         if ((GetFontWidth() * caretPos) > (extents.w - GetFontWidth()))
 128                                 scrollPos++;
 129                         else
 130                                 caretPos++;
 131                 }
 132         }
 133         else if (key == SDLK_RETURN)
 134         {
 135                 clicked = activated = false;
 136         }
 137
 138         CheckStateAndRedrawIfNeeded();
 139 }
 140
 141 void TextEdit::HandleMouseMove(uint32 x, uint32 y)
 142 {
 143         SaveStateVariables();
 144         inside = Inside(x, y);
 145         CheckStateAndRedrawIfNeeded();
 146 }
 147
 148 void TextEdit::HandleMouseButton(uint32 x, uint32 y, bool mouseDown)
 149 {
 150         SaveStateVariables();
 151
 152 //Not sure that this is right way to handle this...
 153 //Should set the cursor position based on where in the text box it was clicked...
 154         if (inside)
 155         {
 156                 if (mouseDown)
 157                         clicked = true;
 158
 159                 if (clicked && !mouseDown)
 160                 {
 161                         clicked = false, activated = true;
 162
 163                         // Send a message to our parent widget (if any) that we're activated
 164                         if (parent)
 165                                 parent->Notify(this);
 166                 }
 167         }
 168         else
 169                 clicked = activated = false;
 170
 171         CheckStateAndRedrawIfNeeded();
 172 }
 173
 174 void TextEdit::Draw(void)
 175 {
 176         if (img == NULL)
 177                 return;                                                                 // Bail out if no surface was created...
 178
 179         SDL_Rect rect = GetScreenCoords();
 180
 181         // Now, draw the appropriate text state!
 182
 183         if (!activated)
 184         {
 185                 if (inside)
 186                 {
 187                         SDL_Rect rect2;
 188                         rect2.x = 1;
 189                         rect2.y = 1;
 190                         rect2.w = extents.w - 2;
 191                         rect2.h = extents.h - 2;
 192
 193                         SDL_FillRect(img, NULL, hiliteColor);
 194                         SDL_FillRect(img, &rect2, bgColor);
 195                 }
 196                 else
 197                         SDL_FillRect(img, NULL, bgColor);
 198         }
 199         else
 200                 SDL_FillRect(img, NULL, bgColor);//Make a different color here, so we're clear we're editing...
 201
 202 //Should also draw different text color depending on whether or not we're activated...
 203         if (activated)
 204                 DrawStringTrans(img, 0, 0, fgColor, text.c_str() + scrollPos);
 205         else
 206                 DrawStringTrans(img, 0, 0, fgColor, text.c_str());
 207
 208         // Draw the cursor, if any
 209
 210         if (activated)
 211         {
 212                 SDL_Rect rectCursor;
 213                 rectCursor.x = caretPos * GetFontWidth();
 214                 rectCursor.y = 0;
 215                 rectCursor.w = 2;
 216                 rectCursor.h = GetFontHeight();
 217
 218                 SDL_FillRect(img, &rectCursor, cursorColor);
 219         }
 220
 221         SDL_BlitSurface(img, NULL, screen, &rect);      // This handles alpha blending too! :-D
 222
 223         needToRefreshScreen = true;
 224 }
 225
 226 void TextEdit::Notify(Element *)
 227 {
 228 }
 229
 230 string TextEdit::GetText(void)
 231 {
 232         return text;
 233 }
 234
 235 void TextEdit::SaveStateVariables(void)
 236 {
 237         activatedSave = activated;
 238         clickedSave = clicked;
 239         insideSave = inside;
 240         caretPosSave = caretPos;
 241         scrollPosSave = scrollPos;
 242         lengthSave = text.length();
 243 }
 244
 245 void TextEdit::CheckStateAndRedrawIfNeeded(void)
 246 {
 247         // Check to see if any of our state variables changed since we last saved them...
 248         if (activated != activatedSave || clicked != clickedSave || inside != insideSave
 249                 || caretPos != caretPosSave || scrollPos != scrollPosSave
 250                 || text.length() != lengthSave)
 251                 Draw();
 252 }