WindowManager.cpp

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00032 
00033 #include <algorithm>
00034 #include <functional>
00035 #include "Bitmap.hpp"
00036 #include "WindowManager.hpp"
00037 
00038 static void deleteWindow(Window * window) { delete window; }
00039 
00040 WindowManager::~WindowManager() {
00041   // Free all windows.
00042   std::for_each(windowStack.begin(), windowStack.end(), deleteWindow);
00043   std::for_each(actionQueue.begin(), actionQueue.end(), deleteWindow);
00044 }
00045 
00046 void WindowManager::processAction(Window * window) {
00047   if (window) {
00048     windowStack.push_back(window);
00049   } else if (!windowStack.empty()) {
00050     delete windowStack.back();
00051     windowStack.pop_back();
00052   }
00053 }
00054 
00055 void WindowManager::push(std::auto_ptr<Window> & window) {
00056   if (window.get()) {
00057     window->resize(canvas.width(), canvas.height());
00058     window->move(0, 0);
00059     window->setWindowManager(NULL);
00060     actionQueue.push_back(window.release());
00061   }
00062 }
00063 
00064 void WindowManager::pop() { actionQueue.push_back(NULL); }
00065 
00066 bool WindowManager::update() {
00067   bool redraw = false;
00068 
00069   // Perform all queued push / pop actions.
00070   if (!actionQueue.empty()) {
00071     if (!windowStack.empty()) {
00072       windowStack.back()->setWindowManager(NULL);
00073     }
00074     std::for_each(
00075         actionQueue.begin(), actionQueue.end(),
00076         std::bind1st(std::mem_fun(&WindowManager::processAction), this));
00077     actionQueue.clear();
00078     if (windowStack.empty()) {
00079       canvas.clear();
00080       redraw = true;
00081     } else {
00082       windowStack.back()->setWindowManager(this);
00083     }
00084   }
00085 
00086   if (!windowStack.empty()) {
00087     // Update all windows. Only allow redraw of the top window.
00088     for (std::vector<Window *>::reverse_iterator it = windowStack.rbegin();
00089          it != windowStack.rend(); ++it) {
00090       if ((*it)->update(it == windowStack.rbegin() ? &canvas : NULL)) {
00091         redraw = true;
00092       }
00093     }
00094   }
00095 
00096   return redraw;
00097 }
00098 
00099 void WindowManager::processKey(Key key) {
00100   if (!windowStack.empty()) {
00101     windowStack.back()->processKey(key);
00102   }
00103 }