widget.cpp

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00001 /* $Id: widget.cpp 15718 2009-03-15 00:32:18Z rubidium $ */
00002 
00005 #include "stdafx.h"
00006 #include "company_func.h"
00007 #include "gfx_func.h"
00008 #include "window_gui.h"
00009 
00010 #include "table/sprites.h"
00011 #include "table/strings.h"
00012 
00013 static const char *UPARROW   = "\xEE\x8A\xA0";
00014 static const char *DOWNARROW = "\xEE\x8A\xAA";
00015 
00024 static Point HandleScrollbarHittest(const Scrollbar *sb, int top, int bottom)
00025 {
00026   Point pt;
00027   int height, count, pos, cap;
00028 
00029   top += 10;   // top    points to just below the up-button
00030   bottom -= 9; // bottom points to top of the down-button
00031 
00032   height = (bottom - top);
00033 
00034   pos = sb->pos;
00035   count = sb->count;
00036   cap = sb->cap;
00037 
00038   if (count != 0) top += height * pos / count;
00039 
00040   if (cap > count) cap = count;
00041   if (count != 0) bottom -= (count - pos - cap) * height / count;
00042 
00043   pt.x = top;
00044   pt.y = bottom - 1;
00045   return pt;
00046 }
00047 
00055 void ScrollbarClickHandler(Window *w, const Widget *wi, int x, int y)
00056 {
00057   int mi, ma, pos;
00058   Scrollbar *sb;
00059 
00060   switch (wi->type) {
00061     case WWT_SCROLLBAR:
00062       /* vertical scroller */
00063       w->flags4 &= ~WF_HSCROLL;
00064       w->flags4 &= ~WF_SCROLL2;
00065       mi = wi->top;
00066       ma = wi->bottom;
00067       pos = y;
00068       sb = &w->vscroll;
00069       break;
00070 
00071     case WWT_SCROLL2BAR:
00072       /* 2nd vertical scroller */
00073       w->flags4 &= ~WF_HSCROLL;
00074       w->flags4 |= WF_SCROLL2;
00075       mi = wi->top;
00076       ma = wi->bottom;
00077       pos = y;
00078       sb = &w->vscroll2;
00079       break;
00080 
00081     case  WWT_HSCROLLBAR:
00082       /* horizontal scroller */
00083       w->flags4 &= ~WF_SCROLL2;
00084       w->flags4 |= WF_HSCROLL;
00085       mi = wi->left;
00086       ma = wi->right;
00087       pos = x;
00088       sb = &w->hscroll;
00089       break;
00090 
00091     default: NOT_REACHED();
00092   }
00093   if (pos <= mi + 9) {
00094     /* Pressing the upper button? */
00095     w->flags4 |= WF_SCROLL_UP;
00096     if (_scroller_click_timeout == 0) {
00097       _scroller_click_timeout = 6;
00098       if (sb->pos != 0) sb->pos--;
00099     }
00100     _left_button_clicked = false;
00101   } else if (pos >= ma - 10) {
00102     /* Pressing the lower button? */
00103     w->flags4 |= WF_SCROLL_DOWN;
00104 
00105     if (_scroller_click_timeout == 0) {
00106       _scroller_click_timeout = 6;
00107       if ((byte)(sb->pos + sb->cap) < sb->count)
00108         sb->pos++;
00109     }
00110     _left_button_clicked = false;
00111   } else {
00112     Point pt = HandleScrollbarHittest(sb, mi, ma);
00113 
00114     if (pos < pt.x) {
00115       sb->pos = max(sb->pos - sb->cap, 0);
00116     } else if (pos > pt.y) {
00117       sb->pos = min(
00118         sb->pos + sb->cap,
00119         max(sb->count - sb->cap, 0)
00120       );
00121     } else {
00122       _scrollbar_start_pos = pt.x - mi - 9;
00123       _scrollbar_size = ma - mi - 23;
00124       w->flags4 |= WF_SCROLL_MIDDLE;
00125       _scrolling_scrollbar = true;
00126       _cursorpos_drag_start = _cursor.pos;
00127     }
00128   }
00129 
00130   w->SetDirty();
00131 }
00132 
00140 int GetWidgetFromPos(const Window *w, int x, int y)
00141 {
00142   uint index;
00143   int found_index = -1;
00144 
00145   /* Go through the widgets and check if we find the widget that the coordinate is
00146    * inside. */
00147   for (index = 0; index < w->widget_count; index++) {
00148     const Widget *wi = &w->widget[index];
00149     if (wi->type == WWT_EMPTY || wi->type == WWT_FRAME) continue;
00150 
00151     if (x >= wi->left && x <= wi->right && y >= wi->top &&  y <= wi->bottom &&
00152         !w->IsWidgetHidden(index)) {
00153       found_index = index;
00154     }
00155   }
00156 
00157   return found_index;
00158 }
00159 
00169 void DrawFrameRect(int left, int top, int right, int bottom, Colours colour, FrameFlags flags)
00170 {
00171   uint dark         = _colour_gradient[colour][3];
00172   uint medium_dark  = _colour_gradient[colour][5];
00173   uint medium_light = _colour_gradient[colour][6];
00174   uint light        = _colour_gradient[colour][7];
00175 
00176   if (flags & FR_TRANSPARENT) {
00177     GfxFillRect(left, top, right, bottom, PALETTE_TO_TRANSPARENT, FILLRECT_RECOLOUR);
00178   } else {
00179     uint interior;
00180 
00181     if (flags & FR_LOWERED) {
00182       GfxFillRect(left,     top,     left,  bottom,     dark);
00183       GfxFillRect(left + 1, top,     right, top,        dark);
00184       GfxFillRect(right,    top + 1, right, bottom - 1, light);
00185       GfxFillRect(left + 1, bottom,  right, bottom,     light);
00186       interior = (flags & FR_DARKENED ? medium_dark : medium_light);
00187     } else {
00188       GfxFillRect(left,     top,    left,      bottom - 1, light);
00189       GfxFillRect(left + 1, top,    right - 1, top,        light);
00190       GfxFillRect(right,    top,    right,     bottom - 1, dark);
00191       GfxFillRect(left,     bottom, right,     bottom,     dark);
00192       interior = medium_dark;
00193     }
00194     if (!(flags & FR_BORDERONLY)) {
00195       GfxFillRect(left + 1, top + 1, right - 1, bottom - 1, interior);
00196     }
00197   }
00198 }
00199 
00200 
00204 void Window::DrawWidgets() const
00205 {
00206   const DrawPixelInfo *dpi = _cur_dpi;
00207 
00208   for (uint i = 0; i < this->widget_count; i++) {
00209     const Widget *wi = &this->widget[i];
00210     bool clicked = this->IsWidgetLowered(i);
00211     Rect r;
00212 
00213     if (dpi->left > (r.right = wi->right) ||
00214         dpi->left + dpi->width <= (r.left = wi->left) ||
00215         dpi->top > (r.bottom = wi->bottom) ||
00216         dpi->top + dpi->height <= (r.top = wi->top) ||
00217         this->IsWidgetHidden(i)) {
00218       continue;
00219     }
00220 
00221     switch (wi->type & WWT_MASK) {
00222     case WWT_IMGBTN:
00223     case WWT_IMGBTN_2: {
00224       SpriteID img = wi->data;
00225       assert(img != 0);
00226       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->colour, (clicked) ? FR_LOWERED : FR_NONE);
00227 
00228       /* show different image when clicked for WWT_IMGBTN_2 */
00229       if ((wi->type & WWT_MASK) == WWT_IMGBTN_2 && clicked) img++;
00230       DrawSprite(img, PAL_NONE, r.left + 1 + clicked, r.top + 1 + clicked);
00231       break;
00232     }
00233 
00234     case WWT_PANEL:
00235       assert(wi->data == 0);
00236       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->colour, (clicked) ? FR_LOWERED : FR_NONE);
00237       break;
00238 
00239     case WWT_EDITBOX:
00240       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->colour, FR_LOWERED | FR_DARKENED);
00241       break;
00242 
00243     case WWT_TEXTBTN:
00244     case WWT_TEXTBTN_2:
00245       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->colour, (clicked) ? FR_LOWERED : FR_NONE);
00246       /* FALL THROUGH */
00247 
00248     case WWT_LABEL: {
00249       StringID str = wi->data;
00250 
00251       if ((wi->type & WWT_MASK) == WWT_TEXTBTN_2 && clicked) str++;
00252 
00253       DrawStringCentered(((r.left + r.right + 1) >> 1) + clicked, ((r.top + r.bottom + 1) >> 1) - 5 + clicked, str, TC_FROMSTRING);
00254       break;
00255     }
00256 
00257     case WWT_TEXT: {
00258       const StringID str = wi->data;
00259 
00260       if (str != STR_NULL) DrawStringTruncated(r.left, r.top, str, (TextColour)wi->colour, r.right - r.left);
00261       break;
00262     }
00263 
00264     case WWT_INSET: {
00265       const StringID str = wi->data;
00266       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->colour, FR_LOWERED | FR_DARKENED);
00267 
00268       if (str != STR_NULL) DrawStringTruncated(r.left + 2, r.top + 1, str, TC_FROMSTRING, r.right - r.left - 10);
00269       break;
00270     }
00271 
00272     case WWT_MATRIX: {
00273       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->colour, (clicked) ? FR_LOWERED : FR_NONE);
00274 
00275       int c = GB(wi->data, 0, 8);
00276       int amt1 = (wi->right - wi->left + 1) / c;
00277 
00278       int d = GB(wi->data, 8, 8);
00279       int amt2 = (wi->bottom - wi->top + 1) / d;
00280 
00281       int colour = _colour_gradient[wi->colour & 0xF][6];
00282 
00283       int x = r.left;
00284       for (int ctr = c; ctr > 1; ctr--) {
00285         x += amt1;
00286         GfxFillRect(x, r.top + 1, x, r.bottom - 1, colour);
00287       }
00288 
00289       x = r.top;
00290       for (int ctr = d; ctr > 1; ctr--) {
00291         x += amt2;
00292         GfxFillRect(r.left + 1, x, r.right - 1, x, colour);
00293       }
00294 
00295       colour = _colour_gradient[wi->colour & 0xF][4];
00296 
00297       x = r.left - 1;
00298       for (int ctr = c; ctr > 1; ctr--) {
00299         x += amt1;
00300         GfxFillRect(x, r.top + 1, x, r.bottom - 1, colour);
00301       }
00302 
00303       x = r.top - 1;
00304       for (int ctr = d; ctr > 1; ctr--) {
00305         x += amt2;
00306         GfxFillRect(r.left + 1, x, r.right - 1, x, colour);
00307       }
00308 
00309       break;
00310     }
00311 
00312     /* vertical scrollbar */
00313     case WWT_SCROLLBAR: {
00314       assert(wi->data == 0);
00315       assert(r.right - r.left == 11); // To ensure the same sizes are used everywhere!
00316 
00317       /* draw up/down buttons */
00318       clicked = ((this->flags4 & (WF_SCROLL_UP | WF_HSCROLL | WF_SCROLL2)) == WF_SCROLL_UP);
00319       DrawFrameRect(r.left, r.top, r.right, r.top + 9, wi->colour, (clicked) ? FR_LOWERED : FR_NONE);
00320       DoDrawString(UPARROW, r.left + 2 + clicked, r.top + clicked, TC_BLACK);
00321 
00322       clicked = (((this->flags4 & (WF_SCROLL_DOWN | WF_HSCROLL | WF_SCROLL2)) == WF_SCROLL_DOWN));
00323       DrawFrameRect(r.left, r.bottom - 9, r.right, r.bottom, wi->colour, (clicked) ? FR_LOWERED : FR_NONE);
00324       DoDrawString(DOWNARROW, r.left + 2 + clicked, r.bottom - 9 + clicked, TC_BLACK);
00325 
00326       int c1 = _colour_gradient[wi->colour & 0xF][3];
00327       int c2 = _colour_gradient[wi->colour & 0xF][7];
00328 
00329       /* draw "shaded" background */
00330       GfxFillRect(r.left, r.top + 10, r.right, r.bottom - 10, c2);
00331       GfxFillRect(r.left, r.top + 10, r.right, r.bottom - 10, c1, FILLRECT_CHECKER);
00332 
00333       /* draw shaded lines */
00334       GfxFillRect(r.left + 2, r.top + 10, r.left + 2, r.bottom - 10, c1);
00335       GfxFillRect(r.left + 3, r.top + 10, r.left + 3, r.bottom - 10, c2);
00336       GfxFillRect(r.left + 7, r.top + 10, r.left + 7, r.bottom - 10, c1);
00337       GfxFillRect(r.left + 8, r.top + 10, r.left + 8, r.bottom - 10, c2);
00338 
00339       Point pt = HandleScrollbarHittest(&this->vscroll, r.top, r.bottom);
00340       DrawFrameRect(r.left, pt.x, r.right, pt.y, wi->colour, (this->flags4 & (WF_SCROLL_MIDDLE | WF_HSCROLL | WF_SCROLL2)) == WF_SCROLL_MIDDLE ? FR_LOWERED : FR_NONE);
00341       break;
00342     }
00343 
00344     case WWT_SCROLL2BAR: {
00345       assert(wi->data == 0);
00346       assert(r.right - r.left == 11); // To ensure the same sizes are used everywhere!
00347 
00348       /* draw up/down buttons */
00349       clicked = ((this->flags4 & (WF_SCROLL_UP | WF_HSCROLL | WF_SCROLL2)) == (WF_SCROLL_UP | WF_SCROLL2));
00350       DrawFrameRect(r.left, r.top, r.right, r.top + 9, wi->colour,  (clicked) ? FR_LOWERED : FR_NONE);
00351       DoDrawString(UPARROW, r.left + 2 + clicked, r.top + clicked, TC_BLACK);
00352 
00353       clicked = ((this->flags4 & (WF_SCROLL_DOWN | WF_HSCROLL | WF_SCROLL2)) == (WF_SCROLL_DOWN | WF_SCROLL2));
00354       DrawFrameRect(r.left, r.bottom - 9, r.right, r.bottom, wi->colour,  (clicked) ? FR_LOWERED : FR_NONE);
00355       DoDrawString(DOWNARROW, r.left + 2 + clicked, r.bottom - 9 + clicked, TC_BLACK);
00356 
00357       int c1 = _colour_gradient[wi->colour & 0xF][3];
00358       int c2 = _colour_gradient[wi->colour & 0xF][7];
00359 
00360       /* draw "shaded" background */
00361       GfxFillRect(r.left, r.top + 10, r.right, r.bottom - 10, c2);
00362       GfxFillRect(r.left, r.top + 10, r.right, r.bottom - 10, c1, FILLRECT_CHECKER);
00363 
00364       /* draw shaded lines */
00365       GfxFillRect(r.left + 2, r.top + 10, r.left + 2, r.bottom - 10, c1);
00366       GfxFillRect(r.left + 3, r.top + 10, r.left + 3, r.bottom - 10, c2);
00367       GfxFillRect(r.left + 7, r.top + 10, r.left + 7, r.bottom - 10, c1);
00368       GfxFillRect(r.left + 8, r.top + 10, r.left + 8, r.bottom - 10, c2);
00369 
00370       Point pt = HandleScrollbarHittest(&this->vscroll2, r.top, r.bottom);
00371       DrawFrameRect(r.left, pt.x, r.right, pt.y, wi->colour, (this->flags4 & (WF_SCROLL_MIDDLE | WF_HSCROLL | WF_SCROLL2)) == (WF_SCROLL_MIDDLE | WF_SCROLL2) ? FR_LOWERED : FR_NONE);
00372       break;
00373     }
00374 
00375     /* horizontal scrollbar */
00376     case WWT_HSCROLLBAR: {
00377       assert(wi->data == 0);
00378       assert(r.bottom - r.top == 11); // To ensure the same sizes are used everywhere!
00379 
00380       clicked = ((this->flags4 & (WF_SCROLL_UP | WF_HSCROLL)) == (WF_SCROLL_UP | WF_HSCROLL));
00381       DrawFrameRect(r.left, r.top, r.left + 9, r.bottom, wi->colour, (clicked) ? FR_LOWERED : FR_NONE);
00382       DrawSprite(SPR_ARROW_LEFT, PAL_NONE, r.left + 1 + clicked, r.top + 1 + clicked);
00383 
00384       clicked = ((this->flags4 & (WF_SCROLL_DOWN | WF_HSCROLL)) == (WF_SCROLL_DOWN | WF_HSCROLL));
00385       DrawFrameRect(r.right - 9, r.top, r.right, r.bottom, wi->colour, (clicked) ? FR_LOWERED : FR_NONE);
00386       DrawSprite(SPR_ARROW_RIGHT, PAL_NONE, r.right - 8 + clicked, r.top + 1 + clicked);
00387 
00388       int c1 = _colour_gradient[wi->colour & 0xF][3];
00389       int c2 = _colour_gradient[wi->colour & 0xF][7];
00390 
00391       /* draw "shaded" background */
00392       GfxFillRect(r.left + 10, r.top, r.right - 10, r.bottom, c2);
00393       GfxFillRect(r.left + 10, r.top, r.right - 10, r.bottom, c1, FILLRECT_CHECKER);
00394 
00395       /* draw shaded lines */
00396       GfxFillRect(r.left + 10, r.top + 2, r.right - 10, r.top + 2, c1);
00397       GfxFillRect(r.left + 10, r.top + 3, r.right - 10, r.top + 3, c2);
00398       GfxFillRect(r.left + 10, r.top + 7, r.right - 10, r.top + 7, c1);
00399       GfxFillRect(r.left + 10, r.top + 8, r.right - 10, r.top + 8, c2);
00400 
00401       /* draw actual scrollbar */
00402       Point pt = HandleScrollbarHittest(&this->hscroll, r.left, r.right);
00403       DrawFrameRect(pt.x, r.top, pt.y, r.bottom, wi->colour, (this->flags4 & (WF_SCROLL_MIDDLE | WF_HSCROLL)) == (WF_SCROLL_MIDDLE | WF_HSCROLL) ? FR_LOWERED : FR_NONE);
00404 
00405       break;
00406     }
00407 
00408     case WWT_FRAME: {
00409       const StringID str = wi->data;
00410       int x2 = r.left; // by default the left side is the left side of the widget
00411 
00412       if (str != STR_NULL) x2 = DrawString(r.left + 6, r.top, str, TC_FROMSTRING);
00413 
00414       int c1 = _colour_gradient[wi->colour][3];
00415       int c2 = _colour_gradient[wi->colour][7];
00416 
00417       /* Line from upper left corner to start of text */
00418       GfxFillRect(r.left, r.top + 4, r.left + 4, r.top + 4, c1);
00419       GfxFillRect(r.left + 1, r.top + 5, r.left + 4, r.top + 5, c2);
00420 
00421       /* Line from end of text to upper right corner */
00422       GfxFillRect(x2, r.top + 4, r.right - 1, r.top + 4, c1);
00423       GfxFillRect(x2, r.top + 5, r.right - 2, r.top + 5, c2);
00424 
00425       /* Line from upper left corner to bottom left corner */
00426       GfxFillRect(r.left, r.top + 5, r.left, r.bottom - 1, c1);
00427       GfxFillRect(r.left + 1, r.top + 6, r.left + 1, r.bottom - 2, c2);
00428 
00429       /* Line from upper right corner to bottom right corner */
00430       GfxFillRect(r.right - 1, r.top + 5, r.right - 1, r.bottom - 2, c1);
00431       GfxFillRect(r.right, r.top + 4, r.right, r.bottom - 1, c2);
00432 
00433       GfxFillRect(r.left + 1, r.bottom - 1, r.right - 1, r.bottom - 1, c1);
00434       GfxFillRect(r.left, r.bottom, r.right, r.bottom, c2);
00435 
00436       break;
00437     }
00438 
00439     case WWT_STICKYBOX:
00440       assert(wi->data == 0);
00441       assert(r.right - r.left == 11); // To ensure the same sizes are used everywhere!
00442 
00443       clicked = !!(this->flags4 & WF_STICKY);
00444       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->colour, (clicked) ? FR_LOWERED : FR_NONE);
00445       DrawSprite((clicked) ? SPR_PIN_UP : SPR_PIN_DOWN, PAL_NONE, r.left + 2 + clicked, r.top + 3 + clicked);
00446       break;
00447 
00448     case WWT_RESIZEBOX:
00449       assert(wi->data == 0);
00450       assert(r.right - r.left == 11); // To ensure the same sizes are used everywhere!
00451 
00452       clicked = !!(this->flags4 & WF_SIZING);
00453       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->colour, (clicked) ? FR_LOWERED : FR_NONE);
00454       DrawSprite(SPR_WINDOW_RESIZE, PAL_NONE, r.left + 3 + clicked, r.top + 3 + clicked);
00455       break;
00456 
00457     case WWT_CLOSEBOX: {
00458       const StringID str = wi->data;
00459 
00460       assert(str == STR_00C5 || str == STR_00C6); // black or silver cross
00461       assert(r.right - r.left == 10); // To ensure the same sizes are used everywhere
00462 
00463       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->colour, FR_NONE);
00464       DrawString(r.left + 2, r.top + 2, str, TC_FROMSTRING);
00465       break;
00466     }
00467 
00468     case WWT_CAPTION:
00469       assert(r.bottom - r.top == 13); // To ensure the same sizes are used everywhere!
00470       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->colour, FR_BORDERONLY);
00471       DrawFrameRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, wi->colour, (this->owner == INVALID_OWNER) ? FR_LOWERED | FR_DARKENED : FR_LOWERED | FR_DARKENED | FR_BORDERONLY);
00472 
00473       if (this->owner != INVALID_OWNER) {
00474         GfxFillRect(r.left + 2, r.top + 2, r.right - 2, r.bottom - 2, _colour_gradient[_company_colours[this->owner]][4]);
00475       }
00476 
00477       DrawStringCenteredTruncated(r.left + 2, r.right - 2, r.top + 2, wi->data, TC_FROMSTRING);
00478       break;
00479 
00480     case WWT_DROPDOWN: {
00481       assert(r.bottom - r.top == 11); // ensure consistent size
00482 
00483       StringID str = wi->data;
00484       DrawFrameRect(r.left, r.top, r.right - 12, r.bottom, wi->colour, FR_NONE);
00485       DrawFrameRect(r.right - 11, r.top, r.right, r.bottom, wi->colour, clicked ? FR_LOWERED : FR_NONE);
00486       DrawString(r.right - (clicked ? 8 : 9), r.top + (clicked ? 2 : 1), STR_0225, TC_BLACK);
00487       if (str != STR_NULL) DrawStringTruncated(r.left + 2, r.top + 1, str, TC_BLACK, r.right - r.left - 12);
00488       break;
00489     }
00490 
00491     case WWT_DROPDOWNIN: {
00492       assert(r.bottom - r.top == 11); // ensure consistent size
00493 
00494       StringID str = wi->data;
00495       DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->colour, FR_LOWERED | FR_DARKENED);
00496       DrawFrameRect(r.right - 11, r.top + 1, r.right - 1, r.bottom - 1, wi->colour, clicked ? FR_LOWERED : FR_NONE);
00497       DrawString(r.right - (clicked ? 8 : 9), r.top + (clicked ? 2 : 1), STR_0225, TC_BLACK);
00498       if (str != STR_NULL) DrawStringTruncated(r.left + 2, r.top + 2, str, TC_BLACK, r.right - r.left - 12);
00499       break;
00500     }
00501     }
00502 
00503     if (this->IsWidgetDisabled(i)) {
00504       GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, _colour_gradient[wi->colour & 0xF][2], FILLRECT_CHECKER);
00505     }
00506   }
00507 
00508 
00509   if (this->flags4 & WF_WHITE_BORDER_MASK) {
00510     DrawFrameRect(0, 0, this->width - 1, this->height - 1, COLOUR_WHITE, FR_BORDERONLY);
00511   }
00512 
00513 }
00514 
00515 static void ResizeWidgets(Window *w, byte a, byte b)
00516 {
00517   int16 offset = w->widget[a].left;
00518   int16 length = w->widget[b].right - offset;
00519 
00520   w->widget[a].right = (length / 2) + offset;
00521 
00522   w->widget[b].left  = w->widget[a].right + 1;
00523 }
00524 
00525 static void ResizeWidgets(Window *w, byte a, byte b, byte c)
00526 {
00527   int16 offset = w->widget[a].left;
00528   int16 length = w->widget[c].right - offset;
00529 
00530   w->widget[a].right = length / 3;
00531   w->widget[b].right = w->widget[a].right * 2;
00532 
00533   w->widget[a].right += offset;
00534   w->widget[b].right += offset;
00535 
00536   /* Now the right side of the buttons are set. We will now set the left sides next to them */
00537   w->widget[b].left  = w->widget[a].right + 1;
00538   w->widget[c].left  = w->widget[b].right + 1;
00539 }
00540 
00547 void ResizeButtons(Window *w, byte left, byte right)
00548 {
00549   int16 num_widgets = right - left + 1;
00550 
00551   if (num_widgets < 2) NOT_REACHED();
00552 
00553   switch (num_widgets) {
00554     case 2: ResizeWidgets(w, left, right); break;
00555     case 3: ResizeWidgets(w, left, left + 1, right); break;
00556     default: {
00557       /* Looks like we got more than 3 widgets to resize
00558        * Now we will find the middle of the space desinated for the widgets
00559        * and place half of the widgets on each side of it and call recursively.
00560        * Eventually we will get down to blocks of 2-3 widgets and we got code to handle those cases */
00561       int16 offset = w->widget[left].left;
00562       int16 length = w->widget[right].right - offset;
00563       byte widget = ((num_widgets - 1)/ 2) + left; // rightmost widget of the left side
00564 
00565       /* Now we need to find the middle of the widgets.
00566        * It will not always be the middle because if we got an uneven number of widgets,
00567        *   we will need it to be 2/5, 3/7 and so on
00568        * To get this, we multiply with num_widgets/num_widgets. Since we calculate in int, we will get:
00569        *
00570        *    num_widgets/2 (rounding down)
00571        *   ---------------
00572        *     num_widgets
00573        *
00574        * as multiplier to length. We just multiply before divide to that we stay in the int area though */
00575       int16 middle = ((length * num_widgets) / (2 * num_widgets)) + offset;
00576 
00577       /* Set left and right on the widgets, that's next to our "middle" */
00578       w->widget[widget].right = middle;
00579       w->widget[widget + 1].left = w->widget[widget].right + 1;
00580       /* Now resize the left and right of the middle */
00581       ResizeButtons(w, left, widget);
00582       ResizeButtons(w, widget + 1, right);
00583     }
00584   }
00585 }
00586 
00588 void ResizeWindowForWidget(Window *w, uint widget, int delta_x, int delta_y)
00589 {
00590   int right  = w->widget[widget].right;
00591   int bottom = w->widget[widget].bottom;
00592 
00593   for (uint i = 0; i < w->widget_count; i++) {
00594     if (w->widget[i].left >= right && i != widget) w->widget[i].left += delta_x;
00595     if (w->widget[i].right >= right) w->widget[i].right += delta_x;
00596     if (w->widget[i].top >= bottom && i != widget) w->widget[i].top += delta_y;
00597     if (w->widget[i].bottom >= bottom) w->widget[i].bottom += delta_y;
00598   }
00599 
00600   /* A hidden widget has bottom == top or right == left, we need to make it
00601    * one less to fit in its new gap. */
00602   if (right  == w->widget[widget].left) w->widget[widget].right--;
00603   if (bottom == w->widget[widget].top)  w->widget[widget].bottom--;
00604 
00605   if (w->widget[widget].left > w->widget[widget].right)  w->widget[widget].right  = w->widget[widget].left;
00606   if (w->widget[widget].top  > w->widget[widget].bottom) w->widget[widget].bottom = w->widget[widget].top;
00607 
00608   w->width  += delta_x;
00609   w->height += delta_y;
00610   w->resize.width  += delta_x;
00611   w->resize.height += delta_y;
00612 }
00613 
00619 void Window::DrawSortButtonState(int widget, SortButtonState state) const
00620 {
00621   if (state == SBS_OFF) return;
00622 
00623   int offset = this->IsWidgetLowered(widget) ? 1 : 0;
00624   DoDrawString(state == SBS_DOWN ? DOWNARROW : UPARROW, this->widget[widget].right - 11 + offset, this->widget[widget].top + 1 + offset, TC_BLACK);
00625 }

Generated on Mon Jun 8 23:04:09 2009 for OpenTTD by  doxygen 1.5.6