From c273ca3ea79d8badd92e9704453d7306e0d85739 Mon Sep 17 00:00:00 2001
From: Jaakko Keränen <jaakko.keranen@iki.fi>
Date: Sat, 13 Mar 2021 07:00:59 +0200
Subject: Mobile: Simplified window event handling

The desktop window events do things that are not relevant on mobile, and may in fact be harmful.

Since mobile is essentially fullscreen only, needed updates to root size are done whenever the window is redrawn.
---
 src/ui/window.c | 34 ++++++++++++++++++++++++++++++----
 1 file changed, 30 insertions(+), 4 deletions(-)

(limited to 'src/ui/window.c')

diff --git a/src/ui/window.c b/src/ui/window.c
index 5b65f173..edbbf0e9 100644
--- a/src/ui/window.c
+++ b/src/ui/window.c
@@ -111,7 +111,9 @@ static iBool handleRootCommands_(iWidget *root, const char *cmd) {
         return iTrue;
     }
     else if (equal_Command(cmd, "window.focus.lost")) {
+#if !defined (iPlatformMobile) /* apps don't share input focus on mobile */
         setFocus_Widget(NULL);
+#endif
         setTextColor_LabelWidget(findWidget_App("winbar.app"), uiAnnotation_ColorId);
         setTextColor_LabelWidget(findWidget_App("winbar.title"), uiAnnotation_ColorId);
         return iFalse;
@@ -1544,6 +1546,7 @@ static iBool handleWindowEvent_Window_(iWindow *d, const SDL_WindowEvent *ev) {
             }
 #endif
             return iFalse;
+#if defined (iPlatformDesktop)
         case SDL_WINDOWEVENT_MOVED: {
             if (d->isMinimized) {
                 return iFalse;
@@ -1585,7 +1588,7 @@ static iBool handleWindowEvent_Window_(iWindow *d, const SDL_WindowEvent *ev) {
                     return iTrue;
                 }
             }
-#endif
+#endif /* defined LAGRANGE_CUSTOM_FRAME */
             //printf("MOVED: %d, %d\n", ev->data1, ev->data2); fflush(stdout);
             if (unsnap_Window_(d, &newPos)) {
                 return iTrue;
@@ -1627,6 +1630,7 @@ static iBool handleWindowEvent_Window_(iWindow *d, const SDL_WindowEvent *ev) {
         case SDL_WINDOWEVENT_MINIMIZED:
             d->isMinimized = iTrue;
             return iTrue;
+#endif
         case SDL_WINDOWEVENT_LEAVE:
             unhover_Widget();
             d->isMouseInside = iFalse;
@@ -1636,18 +1640,29 @@ static iBool handleWindowEvent_Window_(iWindow *d, const SDL_WindowEvent *ev) {
             d->isMouseInside = iTrue;
             postCommand_App("window.mouse.entered");
             return iTrue;
-        case SDL_WINDOWEVENT_TAKE_FOCUS:
-            SDL_SetWindowInputFocus(d->win);
+#if defined (iPlatformMobile)
+        case SDL_WINDOWEVENT_RESIZED:
+            /* On mobile, this occurs when the display is rotated. */
+            invalidate_Window_(d);
             postRefresh_App();
             return iTrue;
+#endif
         case SDL_WINDOWEVENT_FOCUS_GAINED:
             d->focusGainedAt = SDL_GetTicks();
             setCapsLockDown_Keys(iFalse);
             postCommand_App("window.focus.gained");
+#if defined (iPlatformMobile)
+            /* Returned to foreground, may have lost buffered content. */
+            invalidate_Window_(d);
+#endif
             return iFalse;
         case SDL_WINDOWEVENT_FOCUS_LOST:
             postCommand_App("window.focus.lost");
             return iFalse;
+        case SDL_WINDOWEVENT_TAKE_FOCUS:
+            SDL_SetWindowInputFocus(d->win);
+            postRefresh_App();
+            return iTrue;
         default:
             break;
     }
@@ -1775,7 +1790,18 @@ void draw_Window(iWindow *d) {
     if (d->isDrawFrozen) {
         return;
     }
-    const int   winFlags = SDL_GetWindowFlags(d->win);
+#if defined (iPlatformMobile)
+    /* Check if root needs resizing. */ {
+        iInt2 renderSize;
+        SDL_GetRendererOutputSize(d->render, &renderSize.x, &renderSize.y);
+        if (!isEqual_I2(renderSize, d->root->rect.size)) {
+            updatePadding_Window_(d);
+            updateRootSize_Window_(d, iTrue);
+            processEvents_App(postedEventsOnly_AppEventMode);
+        }
+    }
+#endif
+    const int winFlags = SDL_GetWindowFlags(d->win);
     const iBool gotFocus = (winFlags & SDL_WINDOW_INPUT_FOCUS) != 0;
     /* Clear the window. The clear color is visible as a border around the window
        when the custom frame is being used. */ {
-- 
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