Renamed EventDispatch and EventTarget by adding UI prefix

1 files changed, 274 insertions, 0 deletions

diff --git a/StarsEx/UIEventDispatch.cpp b/StarsEx/UIEventDispatch.cpp
new file mode 100644
index 0000000..8c69bea
--- /dev/null
+++ b/StarsEx/UIEventDispatch.cpp
@@ -0,0 +1,274 @@
+/*  Starshatter: The Open Source Project
+    Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
+    Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
+    Copyright (c) 1997-2006, Destroyer Studios LLC.
+
+    AUTHOR:       John DiCamillo
+
+*/
+
+#include "UIEventDispatch.h"
+
+#include "Mouse.h"
+#include "Keyboard.h"
+
+// +--------------------------------------------------------------------+
+
+int GetKeyPlus(int& key, int& shift);
+
+// +--------------------------------------------------------------------+
+
+UIEventDispatch* UIEventDispatch::dispatcher = 0;
+
+// +--------------------------------------------------------------------+
+
+UIEventDispatch::UIEventDispatch()
+    : capture(0), current(0), focus(0), click_tgt(0),
+      mouse_x(0), mouse_y(0), mouse_l(0), mouse_r(0)
+{ }
+
+UIEventDispatch::~UIEventDispatch()
+{ }
+
+// +--------------------------------------------------------------------+
+
+void
+UIEventDispatch::Create()
+{
+    dispatcher = new UIEventDispatch;
+}
+
+// +--------------------------------------------------------------------+
+
+void
+UIEventDispatch::Close()
+{
+    delete dispatcher;
+    dispatcher = 0;
+}
+
+// +--------------------------------------------------------------------+
+
+void
+UIEventDispatch::Dispatch()
+{
+    int ml = Mouse::LButton();
+    int mr = Mouse::RButton();
+    int mx = Mouse::X();
+    int my = Mouse::Y();
+    int mw = Mouse::Wheel();
+
+    UIEventTarget* mouse_tgt = capture;
+    UIEventTarget* key_tgt   = focus;
+    UIEventTarget* do_click  = 0;
+
+    if (!mouse_tgt) {
+        ListIter<UIEventTarget> iter = clients;
+        while (++iter) {
+            UIEventTarget* test = iter.value();
+            if (test->IsFormActive()) {
+                if (test->TargetRect().Contains(mx,my))
+                mouse_tgt = test;
+
+                if (test->HasFocus())
+                key_tgt = test;
+            }
+        }
+    }
+
+    // Mouse Events:
+
+    if (mouse_tgt != current) {
+        if (current && current->IsEnabled() && current->IsVisible())
+        current->OnMouseExit(mx,my);
+
+        current = mouse_tgt;
+
+        if (current && current->IsEnabled() && current->IsVisible())
+        current->OnMouseEnter(mx,my);
+    }
+
+    if (mouse_tgt && mouse_tgt->IsEnabled()) {
+        if (mx != mouse_x || my != mouse_y)
+        mouse_tgt->OnMouseMove(mx,my);
+
+        if (mw != 0)
+        mouse_tgt->OnMouseWheel(mw);
+
+        if (ml != mouse_l) {
+            if (ml) {
+                mouse_tgt->OnLButtonDown(mx,my);
+                click_tgt = mouse_tgt;
+            }
+            else {
+                mouse_tgt->OnLButtonUp(mx,my);
+
+                if (click_tgt == mouse_tgt) {
+                    if (click_tgt->TargetRect().Contains(mx,my))
+                    do_click = click_tgt;
+                    click_tgt = 0;
+                }
+            }
+        }
+
+        if (mr != mouse_r) {
+            if (mr)
+            mouse_tgt->OnRButtonDown(mx,my);
+            else
+            mouse_tgt->OnRButtonUp(mx,my);
+        }
+    }
+
+    mouse_l = ml;
+    mouse_r = mr;
+    mouse_x = mx;
+    mouse_y = my;
+
+    // Keyboard Events:
+
+    if (click_tgt && click_tgt != key_tgt) {
+        if (key_tgt) key_tgt->KillFocus();
+        key_tgt = click_tgt;
+
+        if (key_tgt != focus) {
+            if (focus) focus->KillFocus();
+
+            if (key_tgt && key_tgt->IsEnabled() && key_tgt->IsVisible())
+            focus = key_tgt;
+            else
+            key_tgt = 0;
+
+            if (focus) focus->SetFocus();
+        }
+    }
+
+    if (key_tgt && key_tgt->IsEnabled()) {
+        int key = 0;
+        int shift = 0;
+
+        while (GetKeyPlus(key, shift)) {
+            if (key == VK_ESCAPE) {
+                key_tgt->KillFocus();
+                focus = 0;
+                break;
+            }
+
+            else if (key == VK_TAB && focus) {
+                int key_index = clients.index(focus) + 1;
+
+                if (shift & 1) key_index -= 2;
+
+                if (key_index >= clients.size())
+                key_index = 0;
+                else if (key_index < 0)
+                key_index = clients.size()-1;
+
+                if (focus) focus->KillFocus();
+                focus = clients[key_index];
+                if (focus) focus->SetFocus();
+
+                break;
+            }
+
+            key_tgt->OnKeyDown(key, shift);
+        }
+    }
+
+    if (do_click)
+    do_click->OnClick();
+}
+
+// +--------------------------------------------------------------------+
+
+void
+UIEventDispatch::MouseEnter(UIEventTarget* mouse_tgt)
+{
+    if (mouse_tgt != current) {
+        if (current) current->OnMouseExit(0,0);
+        current = mouse_tgt;
+        if (current) current->OnMouseEnter(0,0);
+    }
+}
+
+// +--------------------------------------------------------------------+
+
+void
+UIEventDispatch::Register(UIEventTarget* tgt)
+{
+    if (!clients.contains(tgt))
+    clients.append(tgt);
+}
+
+// +--------------------------------------------------------------------+
+
+void
+UIEventDispatch::Unregister(UIEventTarget* tgt)
+{
+    clients.remove(tgt);
+
+    if (capture   == tgt)   capture   = 0;
+    if (current   == tgt)   current   = 0;
+    if (focus     == tgt)   focus     = 0;
+    if (click_tgt == tgt)   click_tgt = 0;
+}
+
+// +--------------------------------------------------------------------+
+
+UIEventTarget*
+UIEventDispatch::GetCapture()
+{
+    return capture;
+}
+
+int
+UIEventDispatch::CaptureMouse(UIEventTarget* tgt)
+{
+    if (tgt) {
+        capture = tgt;
+        return 1;
+    }
+
+    return 0;
+}
+
+int
+UIEventDispatch::ReleaseMouse(UIEventTarget* tgt)
+{
+    if (capture == tgt) {
+        capture = 0;
+        return 1;
+    }
+
+    return 0;
+}
+
+// +--------------------------------------------------------------------+
+
+UIEventTarget*
+UIEventDispatch::GetFocus()
+{
+    return focus;
+}
+
+void
+UIEventDispatch::SetFocus(UIEventTarget* tgt)
+{
+    if (focus != tgt) {
+        if (focus)
+        focus->KillFocus();
+
+        focus = tgt;
+
+        if (focus && focus->IsEnabled() && focus->IsVisible())
+        focus->SetFocus();
+    }
+}
+
+void
+UIEventDispatch::KillFocus(UIEventTarget* tgt)
+{
+    if (focus && focus == tgt) {
+        focus = 0;
+        tgt->KillFocus();
+    }
+}