eleni.mutantstargoat.com Git - winnie/blob - src/wm.cc

   1 #include <algorithm>
   2 #include <stdexcept>
   3 #include <stdio.h>      // TODO
   4
   5 #include "gfx.h"
   6 #include "wm.h"
   7 #include "window.h"
   8 #include "mouse.h"
   9 #include "mouse_cursor.h"
  10
  11 WindowManager *wm;
  12 static WindowManager wminst;
  13
  14 static void display(Window *win);
  15 static void mouse(Window *win, int bn, bool pressed);
  16 static void motion(Window *win, int x, int y);
  17
  18 void WindowManager::create_frame(Window *win)
  19 {
  20         Window *frame = new Window;
  21         Window *parent = win->get_parent();
  22
  23         frame->set_display_callback(display);
  24         frame->set_mouse_button_callback(mouse);
  25         frame->set_mouse_motion_callback(motion);
  26
  27         frame->add_child(win);
  28         frame->set_focusable(false);
  29
  30         windows.push_back(frame);
  31
  32         Rect win_rect = win->get_rect();
  33         frame->move(win_rect.x - frame_thickness,
  34                         win_rect.y - frame_thickness - titlebar_thickness);
  35         frame->resize(win_rect.width + frame_thickness * 2,
  36                         win_rect.height + frame_thickness * 2 + titlebar_thickness);
  37
  38         parent->add_child(frame);
  39 }
  40
  41 void WindowManager::destroy_frame(Window *win)
  42 {
  43         Window *frame = win->parent;
  44         if(!frame) {
  45                 return;
  46         }
  47
  48         std::list<Window*>::iterator it;
  49         it = std::find(windows.begin(), windows.end(), frame);
  50         if(it != windows.end()) {
  51                 root_win->add_child(win);
  52                 windows.erase(it);
  53                 delete frame;
  54         }
  55 }
  56
  57 WindowManager::WindowManager()
  58 {
  59         if(!wm) {
  60                 wm = this;
  61         } else {
  62                 throw std::runtime_error("Trying to create a second instance of WindowManager!\n");
  63         }
  64
  65         root_win = new Window;
  66         root_win->resize(get_screen_size().width, get_screen_size().height);
  67         root_win->move(0, 0);
  68         root_win->set_managed(false);
  69
  70         focused_win = 0;
  71
  72         bg_color[0] = 210;
  73         bg_color[1] = 106;
  74         bg_color[2] = 106;
  75
  76         frame_thickness = 2;
  77         titlebar_thickness = 4;
  78
  79         frame_fcolor[0] = frame_fcolor[1] = frame_fcolor[2] = 142;
  80         frame_ucolor[0] = frame_ucolor[1] = frame_ucolor[2] = 210;
  81
  82         mouse_cursor.set_image(mouse_cursor_width, mouse_cursor_height);
  83         unsigned char *pixels = mouse_cursor.get_image();
  84
  85         for(int i=0; i<mouse_cursor_height; i++) {
  86                 for(int j=0; j<mouse_cursor_width; j++) {
  87                         int val = mouse_cursor_bw[i * mouse_cursor_width + j];
  88                         *pixels++ = val;
  89                         *pixels++ = val;
  90                         *pixels++ = val;
  91                         *pixels++ = 255;
  92                 }
  93         }
  94 }
  95
  96 WindowManager::~WindowManager()
  97 {
  98         delete root_win;
  99 }
 100
 101 void WindowManager::invalidate_region(const Rect &rect)
 102 {
 103         dirty_rects.push_back(rect);
 104 }
 105
 106 void WindowManager::process_windows()
 107 {
 108         if(dirty_rects.empty()) {
 109                 return;
 110         }
 111
 112         std::list<Rect>::iterator drit = dirty_rects.begin();
 113         Rect uni = *drit++;
 114         while(drit != dirty_rects.end()) {
 115                 uni = rect_union(uni, *drit++);
 116         }
 117         dirty_rects.clear();
 118
 119         fill_rect(uni, bg_color[0], bg_color[1], bg_color[2]);
 120
 121         root_win->draw_children(uni);
 122
 123         // draw mouse cursor
 124         int mouse_x, mouse_y;
 125         get_pointer_pos(&mouse_x, &mouse_y);
 126
 127         blit_key(mouse_cursor.get_image(), mouse_cursor.get_rect(),
 128                         get_framebuffer(), get_screen_size(), mouse_x, mouse_y,
 129                         0, 0, 0);
 130
 131         Rect mouse_rect = {mouse_x, mouse_y, mouse_cursor.get_width(), mouse_cursor.get_height()};
 132         invalidate_region(mouse_rect);
 133
 134         gfx_update();
 135 }
 136
 137 void WindowManager::add_window(Window *win)
 138 {
 139         if(!win || win == root_win) {
 140                 return;
 141         }
 142
 143         root_win->add_child(win);
 144
 145         if(windows.empty()) {
 146                 focused_win = win;
 147         }
 148
 149         if(win->get_managed()) {
 150                 create_frame(win);
 151         }
 152
 153         windows.push_back(win);
 154 }
 155
 156 void WindowManager::remove_window(Window *win)
 157 {
 158         std::list<Window*>::iterator it;
 159         it = std::find(windows.begin(), windows.end(), win);
 160
 161         if(it != windows.end()) {
 162                 windows.erase(it);
 163         }
 164 }
 165
 166 void WindowManager::set_focused_window(Window *win)
 167 {
 168         if(win == focused_win) {
 169                 return;
 170         }
 171
 172         if(focused_win) {
 173                 // invalidate the frame (if any)
 174                 Window *parent = focused_win->get_parent();
 175                 if(parent && parent != root_win) {
 176                         parent->invalidate();
 177                 }
 178         }
 179
 180         if(!win) {
 181                 focused_win = 0;
 182                 return;
 183         }
 184
 185         if(win->get_focusable()) {
 186                 focused_win = win;
 187                 return;
 188         }
 189
 190         Window **children = win->get_children();
 191         for(int i=0; i<win->get_children_count(); i++) {
 192                 if(children[0]->get_focusable()) {
 193                         set_focused_window(children[0]);
 194                         return;
 195                 }
 196         }
 197
 198         focused_win = 0;
 199 }
 200
 201 const Window *WindowManager::get_focused_window() const
 202 {
 203         return focused_win;
 204 }
 205
 206 Window *WindowManager::get_focused_window()
 207 {
 208         return focused_win;
 209 }
 210
 211 Window *WindowManager::get_window_at_pos(int pointer_x, int pointer_y)
 212 {
 213         std::list<Window*>::reverse_iterator rit = windows.rbegin();
 214         while(rit != windows.rend()) {
 215                 Window *w = *rit++;
 216                 Window *parent = w->get_parent();
 217
 218                 if(parent == root_win && w->contains_point(pointer_x, pointer_y)) {
 219                         return w;
 220                 }
 221         }
 222
 223         return 0;
 224 }
 225
 226 static void display(Window *win)
 227 {
 228         fill_rect(win->get_rect(), 255, 211, 5);
 229 }
 230
 231 static int prev_x = -1, prev_y;
 232
 233 static void mouse(Window *win, int bn, bool pressed)
 234 {
 235         if(bn == 0) {
 236                 if(pressed) {
 237                         get_pointer_pos(&prev_x, &prev_y);
 238                 } else {
 239                         prev_x = -1;
 240                 }
 241         }
 242 }
 243
 244 static void motion(Window *win, int x, int y)
 245 {
 246         int left_bn = get_button(0);
 247         if(left_bn && prev_x != -1) {
 248                 int dx = x - prev_x;
 249                 int dy = y - prev_y;
 250                 prev_x = x - dx;
 251                 prev_y = y - dy;
 252
 253                 Rect rect = win->get_rect();
 254                 win->move(rect.x + dx, rect.y + dy);
 255         }
 256 }