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SDL_uikitview.m
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_UIKIT
#include "SDL_uikitview.h"
#include "../../events/SDL_keyboard_c.h"
#include "../../events/SDL_mouse_c.h"
#include "../../events/SDL_touch_c.h"
#if SDL_IPHONE_KEYBOARD
#include "keyinfotable.h"
#endif
#include "SDL_uikitappdelegate.h"
#include "SDL_uikitmodes.h"
#include "SDL_uikitwindow.h"
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void _uikit_keyboard_init();
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@implementation SDL_uikitview {
SDL_TouchID touchId;
UITouch *leftFingerDown;
#if SDL_IPHONE_KEYBOARD
UITextField *textField;
#endif
}
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@synthesize viewcontroller;
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- (id)initWithFrame:(CGRect)frame
{
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if (self = [super initWithFrame:frame]) {
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#if SDL_IPHONE_KEYBOARD
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[self initializeKeyboard];
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#endif
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self.multipleTouchEnabled = YES;
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touchId = 1;
SDL_AddTouch(touchId, "");
}
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return self;
}
- (CGPoint)touchLocation:(UITouch *)touch shouldNormalize:(BOOL)normalize
{
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CGPoint point = [touch locationInView:self];
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if (normalize) {
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CGRect bounds = self.bounds;
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point.x /= bounds.size.width;
point.y /= bounds.size.height;
}
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return point;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
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for (UITouch *touch in touches) {
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if (!leftFingerDown) {
CGPoint locationInView = [self touchLocation:touch shouldNormalize:NO];
/* send moved event */
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SDL_SendMouseMotion(self.viewcontroller.window, SDL_TOUCH_MOUSEID, 0, locationInView.x, locationInView.y);
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/* send mouse down event */
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SDL_SendMouseButton(self.viewcontroller.window, SDL_TOUCH_MOUSEID, SDL_PRESSED, SDL_BUTTON_LEFT);
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leftFingerDown = touch;
}
CGPoint locationInView = [self touchLocation:touch shouldNormalize:YES];
SDL_SendTouch(touchId, (SDL_FingerID)((size_t)touch),
SDL_TRUE, locationInView.x, locationInView.y, 1.0f);
}
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
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for (UITouch *touch in touches) {
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if (touch == leftFingerDown) {
/* send mouse up */
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SDL_SendMouseButton(self.viewcontroller.window, SDL_TOUCH_MOUSEID, SDL_RELEASED, SDL_BUTTON_LEFT);
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leftFingerDown = nil;
}
CGPoint locationInView = [self touchLocation:touch shouldNormalize:YES];
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SDL_SendTouch(touchId, (SDL_FingerID)((size_t)touch),
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SDL_FALSE, locationInView.x, locationInView.y, 1.0f);
}
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
/*
this can happen if the user puts more than 5 touches on the screen
at once, or perhaps in other circumstances. Usually (it seems)
all active touches are canceled.
*/
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[self touchesEnded:touches withEvent:event];
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}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
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for (UITouch *touch in touches) {
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if (touch == leftFingerDown) {
CGPoint locationInView = [self touchLocation:touch shouldNormalize:NO];
/* send moved event */
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SDL_SendMouseMotion(self.viewcontroller.window, SDL_TOUCH_MOUSEID, 0, locationInView.x, locationInView.y);
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}
CGPoint locationInView = [self touchLocation:touch shouldNormalize:YES];
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SDL_SendTouchMotion(touchId, (SDL_FingerID)((size_t)touch),
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locationInView.x, locationInView.y, 1.0f);
}
}
/*
---- Keyboard related functionality below this line ----
*/
#if SDL_IPHONE_KEYBOARD
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@synthesize textInputRect;
@synthesize keyboardHeight;
@synthesize keyboardVisible;
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/* Set ourselves up as a UITextFieldDelegate */
- (void)initializeKeyboard
{
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textField = [[UITextField alloc] initWithFrame:CGRectZero];
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textField.delegate = self;
/* placeholder so there is something to delete! */
textField.text = @" ";
/* set UITextInputTrait properties, mostly to defaults */
textField.autocapitalizationType = UITextAutocapitalizationTypeNone;
textField.autocorrectionType = UITextAutocorrectionTypeNo;
textField.enablesReturnKeyAutomatically = NO;
textField.keyboardAppearance = UIKeyboardAppearanceDefault;
textField.keyboardType = UIKeyboardTypeDefault;
textField.returnKeyType = UIReturnKeyDefault;
textField.secureTextEntry = NO;
textField.hidden = YES;
keyboardVisible = NO;
/* add the UITextField (hidden) to our view */
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[self addSubview:textField];
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_uikit_keyboard_init();
}
/* reveal onscreen virtual keyboard */
- (void)showKeyboard
{
keyboardVisible = YES;
[textField becomeFirstResponder];
}
/* hide onscreen virtual keyboard */
- (void)hideKeyboard
{
keyboardVisible = NO;
[textField resignFirstResponder];
}
/* UITextFieldDelegate method. Invoked when user types something. */
- (BOOL)textField:(UITextField *)_textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
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NSUInteger len = string.length;
if (len == 0) {
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/* it wants to replace text with nothing, ie a delete */
SDL_SendKeyboardKey(SDL_PRESSED, SDL_SCANCODE_BACKSPACE);
SDL_SendKeyboardKey(SDL_RELEASED, SDL_SCANCODE_BACKSPACE);
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} else {
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/* go through all the characters in the string we've been sent
and convert them to key presses */
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for (int i = 0; i < len; i++) {
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unichar c = [string characterAtIndex:i];
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Uint16 mod = 0;
SDL_Scancode code;
if (c < 127) {
/* figure out the SDL_Scancode and SDL_keymod for this unichar */
code = unicharToUIKeyInfoTable[c].code;
mod = unicharToUIKeyInfoTable[c].mod;
}
else {
/* we only deal with ASCII right now */
code = SDL_SCANCODE_UNKNOWN;
mod = 0;
}
if (mod & KMOD_SHIFT) {
/* If character uses shift, press shift down */
SDL_SendKeyboardKey(SDL_PRESSED, SDL_SCANCODE_LSHIFT);
}
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/* send a keydown and keyup even for the character */
SDL_SendKeyboardKey(SDL_PRESSED, code);
SDL_SendKeyboardKey(SDL_RELEASED, code);
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if (mod & KMOD_SHIFT) {
/* If character uses shift, press shift back up */
SDL_SendKeyboardKey(SDL_RELEASED, SDL_SCANCODE_LSHIFT);
}
}
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SDL_SendKeyboardText([string UTF8String]);
}
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return NO; /* don't allow the edit! (keep placeholder text there) */
}
/* Terminates the editing session */
- (BOOL)textFieldShouldReturn:(UITextField*)_textField
{
SDL_SendKeyboardKey(SDL_PRESSED, SDL_SCANCODE_RETURN);
SDL_SendKeyboardKey(SDL_RELEASED, SDL_SCANCODE_RETURN);
SDL_StopTextInput();
return YES;
}
#endif
@end
/* iPhone keyboard addition functions */
#if SDL_IPHONE_KEYBOARD
static SDL_uikitview * getWindowView(SDL_Window * window)
{
if (window == NULL) {
SDL_SetError("Window does not exist");
return nil;
}
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SDL_WindowData *data = (__bridge SDL_WindowData *)window->driverdata;
SDL_uikitview *view = data != nil ? data.view : nil;
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if (view == nil) {
SDL_SetError("Window has no view");
}
return view;
}
SDL_bool UIKit_HasScreenKeyboardSupport(_THIS)
{
return SDL_TRUE;
}
void UIKit_ShowScreenKeyboard(_THIS, SDL_Window *window)
{
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@autoreleasepool {
SDL_uikitview *view = getWindowView(window);
if (view != nil) {
[view showKeyboard];
}
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}
}
void UIKit_HideScreenKeyboard(_THIS, SDL_Window *window)
{
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@autoreleasepool {
SDL_uikitview *view = getWindowView(window);
if (view != nil) {
[view hideKeyboard];
}
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}
}
SDL_bool UIKit_IsScreenKeyboardShown(_THIS, SDL_Window *window)
{
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@autoreleasepool {
SDL_uikitview *view = getWindowView(window);
if (view == nil) {
return 0;
}
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return view.isKeyboardVisible;
}
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}
void _uikit_keyboard_update() {
SDL_Window *window = SDL_GetFocusWindow();
if (!window) { return; }
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SDL_WindowData *data = (__bridge SDL_WindowData *)window->driverdata;
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if (!data) { return; }
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SDL_uikitview *view = data.view;
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if (!view) { return; }
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SDL_Rect r = view.textInputRect;
int height = view.keyboardHeight;
int offsetx = 0;
int offsety = 0;
if (height) {
int sw,sh;
SDL_GetWindowSize(window,&sw,&sh);
int bottom = (r.y + r.h);
int kbottom = sh - height;
if (kbottom < bottom) {
offsety = kbottom-bottom;
}
}
UIInterfaceOrientation ui_orient = [[UIApplication sharedApplication] statusBarOrientation];
if (ui_orient == UIInterfaceOrientationLandscapeLeft) {
int tmp = offsetx; offsetx = offsety; offsety = tmp;
}
if (ui_orient == UIInterfaceOrientationLandscapeRight) {
offsety = -offsety;
int tmp = offsetx; offsetx = offsety; offsety = tmp;
}
if (ui_orient == UIInterfaceOrientationPortraitUpsideDown) {
offsety = -offsety;
}
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view.frame = CGRectMake(offsetx,offsety,view.frame.size.width,view.frame.size.height);
}
void _uikit_keyboard_set_height(int height) {
SDL_uikitview *view = getWindowView(SDL_GetFocusWindow());
if (view == nil) {
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return;
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}
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view.keyboardVisible = height > 0;
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view.keyboardHeight = height;
_uikit_keyboard_update();
}
void _uikit_keyboard_init() {
NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
NSOperationQueue *queue = [NSOperationQueue mainQueue];
[center addObserverForName:UIKeyboardWillShowNotification
object:nil
queue:queue
usingBlock:^(NSNotification *notification) {
int height = 0;
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CGSize keyboardSize = [[notification userInfo][UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
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height = keyboardSize.height;
UIInterfaceOrientation ui_orient = [[UIApplication sharedApplication] statusBarOrientation];
if (ui_orient == UIInterfaceOrientationLandscapeRight || ui_orient == UIInterfaceOrientationLandscapeLeft) {
height = keyboardSize.width;
}
_uikit_keyboard_set_height(height);
}
];
[center addObserverForName:UIKeyboardDidHideNotification
object:nil
queue:queue
usingBlock:^(NSNotification *notification) {
_uikit_keyboard_set_height(0);
}
];
}
void
UIKit_SetTextInputRect(_THIS, SDL_Rect *rect)
{
if (!rect) {
SDL_InvalidParamError("rect");
return;
}
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@autoreleasepool {
SDL_uikitview *view = getWindowView(SDL_GetFocusWindow());
if (view == nil) {
return;
}
view.textInputRect = *rect;
}
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}
#endif /* SDL_IPHONE_KEYBOARD */
#endif /* SDL_VIDEO_DRIVER_UIKIT */
/* vi: set ts=4 sw=4 expandtab: */