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-rw-r--r--Xcode-iOS/Demos/src/keyboard.c166
1 files changed, 61 insertions, 105 deletions
diff --git a/Xcode-iOS/Demos/src/keyboard.c b/Xcode-iOS/Demos/src/keyboard.c
index 1932ad4a96..86b5f1ea3c 100644
--- a/Xcode-iOS/Demos/src/keyboard.c
+++ b/Xcode-iOS/Demos/src/keyboard.c
@@ -10,17 +10,16 @@
#define GLYPH_SIZE_IMAGE 16 /* size of glyphs (characters) in the bitmap font file */
#define GLYPH_SIZE_SCREEN 32 /* size of glyphs (characters) as shown on the screen */
-static SDL_Texture *texture; /* texture where we'll hold our font */
+#define MAX_CHARS 1024
-/* function declarations */
-void cleanup(void);
-void drawBlank(int x, int y);
+static SDL_Texture *texture; /* texture where we'll hold our font */
static SDL_Renderer *renderer;
static int numChars = 0; /* number of characters we've typed so far */
-static SDL_bool lastCharWasColon = 0; /* we use this to detect sequences such as :) */
static SDL_Color bg_color = { 50, 50, 100, 255 }; /* color of background */
+static int glyphs[MAX_CHARS];
+
/* this structure maps a scancode to an index in our bitmap font.
it also contains data about under which modifiers the mapping is valid
(for example, we don't want shift + 1 to produce the character '1',
@@ -107,7 +106,7 @@ fontMapping map[TABLE_SIZE] = {
If there is no entry for the key, -1 is returned
*/
int
-keyToIndex(SDL_Keysym key)
+keyToGlyphIndex(SDL_Keysym key)
{
int i, index = -1;
for (i = 0; i < TABLE_SIZE; i++) {
@@ -141,55 +140,19 @@ getPositionForCharNumber(int n, int *x, int *y)
int max_x_chars = (renderW - 2 * x_padding) / GLYPH_SIZE_SCREEN;
int line_separation = 5; /* pixels between each line */
*x = (n % max_x_chars) * GLYPH_SIZE_SCREEN + x_padding;
- *y = (n / max_x_chars) * (GLYPH_SIZE_SCREEN + line_separation) +
- y_padding;
+ *y = (n / max_x_chars) * (GLYPH_SIZE_SCREEN + line_separation) + y_padding;
}
void
-drawIndex(int index)
+drawGlyph(int glyph, int positionIndex)
{
int x, y;
- getPositionForCharNumber(numChars, &x, &y);
- SDL_Rect srcRect =
- { GLYPH_SIZE_IMAGE * index, 0, GLYPH_SIZE_IMAGE, GLYPH_SIZE_IMAGE };
+ getPositionForCharNumber(positionIndex, &x, &y);
+ SDL_Rect srcRect = { GLYPH_SIZE_IMAGE * glyph, 0, GLYPH_SIZE_IMAGE, GLYPH_SIZE_IMAGE };
SDL_Rect dstRect = { x, y, GLYPH_SIZE_SCREEN, GLYPH_SIZE_SCREEN };
- drawBlank(x, y);
SDL_RenderCopy(renderer, texture, &srcRect, &dstRect);
}
-/* draws the cursor icon at the current end position of the text */
-void
-drawCursor(void)
-{
- drawIndex(29); /* cursor is at index 29 in the bitmap font */
-}
-
-/* paints over a glyph sized region with the background color
- in effect it erases the area
-*/
-void
-drawBlank(int x, int y)
-{
- SDL_Rect rect = { x, y, GLYPH_SIZE_SCREEN, GLYPH_SIZE_SCREEN };
- SDL_SetRenderDrawColor(renderer, bg_color.r, bg_color.g, bg_color.b, bg_color.a);
- SDL_RenderFillRect(renderer, &rect);
-}
-
-/* moves backwards one character, erasing the last one put down */
-void
-backspace(void)
-{
- int x, y;
- if (numChars > 0) {
- getPositionForCharNumber(numChars, &x, &y);
- drawBlank(x, y);
- numChars--;
- getPositionForCharNumber(numChars, &x, &y);
- drawBlank(x, y);
- drawCursor();
- }
-}
-
/* this function loads our font into an SDL_Texture and returns the SDL_Texture */
SDL_Texture*
loadFont(void)
@@ -214,8 +177,7 @@ loadFont(void)
Bmask, Amask);
SDL_BlitSurface(surface, NULL, converted, NULL);
/* create our texture */
- texture =
- SDL_CreateTextureFromSurface(renderer, converted);
+ texture = SDL_CreateTextureFromSurface(renderer, converted);
if (texture == 0) {
printf("texture creation failed: %s\n", SDL_GetError());
} else {
@@ -228,13 +190,27 @@ loadFont(void)
}
}
+void
+draw()
+{
+ SDL_SetRenderDrawColor(renderer, bg_color.r, bg_color.g, bg_color.b, bg_color.a);
+ SDL_RenderClear(renderer);
+
+ for (int i = 0; i < numChars; i++) {
+ drawGlyph(glyphs[i], i);
+ }
+
+ drawGlyph(29, numChars); /* cursor is at index 29 in the bitmap font */
+
+ SDL_RenderPresent(renderer);
+}
+
int
main(int argc, char *argv[])
{
int index; /* index of last key we pushed in the bitmap font */
SDL_Window *window;
SDL_Event event; /* last event received */
- SDL_Keymod mod; /* key modifiers of last key we pushed */
SDL_Scancode scancode; /* scancode of last key we pushed */
int width;
int height;
@@ -245,7 +221,7 @@ main(int argc, char *argv[])
/* create window */
window = SDL_CreateWindow("iPhone keyboard test", 0, 0, 320, 480, SDL_WINDOW_ALLOW_HIGHDPI);
/* create renderer */
- renderer = SDL_CreateRenderer(window, -1, 0);
+ renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_PRESENTVSYNC);
SDL_GetWindowSize(window, &width, &height);
SDL_RenderSetLogicalSize(renderer, width, height);
@@ -253,65 +229,45 @@ main(int argc, char *argv[])
/* load up our font */
loadFont();
- /* draw the background, we'll just paint over it */
- SDL_SetRenderDrawColor(renderer, bg_color.r, bg_color.g, bg_color.b, bg_color.a);
- SDL_RenderFillRect(renderer, NULL);
- SDL_RenderPresent(renderer);
-
int done = 0;
- /* loop till we get SDL_Quit */
- while (!done && SDL_WaitEvent(&event)) {
- switch (event.type) {
- case SDL_QUIT:
- done = 1;
- break;
- case SDL_KEYDOWN:
- index = keyToIndex(event.key.keysym);
- scancode = event.key.keysym.scancode;
- mod = event.key.keysym.mod;
- if (scancode == SDL_SCANCODE_DELETE) {
- /* if user hit delete, delete the last character */
- backspace();
- lastCharWasColon = 0;
- } else if (lastCharWasColon && scancode == SDL_SCANCODE_0
- && (mod & KMOD_SHIFT)) {
- /* if our last key was a colon and this one is a close paren, the make a hoppy face */
- backspace();
- drawIndex(32); /* index for happy face */
- numChars++;
- drawCursor();
- lastCharWasColon = 0;
- } else if (index != -1) {
- /* if we aren't doing a happy face, then just draw the normal character */
- drawIndex(index);
- numChars++;
- drawCursor();
- lastCharWasColon =
- (event.key.keysym.scancode == SDL_SCANCODE_SEMICOLON
- && (event.key.keysym.mod & KMOD_SHIFT));
- }
- /* check if the key was a colon */
- /* draw our updates to the screen */
- SDL_RenderPresent(renderer);
- break;
- case SDL_MOUSEBUTTONUP:
- /* mouse up toggles onscreen keyboard visibility */
- if (SDL_IsTextInputActive()) {
- SDL_StopTextInput();
- } else {
- SDL_StartTextInput();
+
+ while (!done) {
+ while (SDL_PollEvent(&event)) {
+ switch (event.type) {
+ case SDL_QUIT:
+ done = 1;
+ break;
+ case SDL_TEXTINPUT:
+ break;
+ case SDL_KEYDOWN:
+ if (event.key.keysym.scancode == SDL_SCANCODE_BACKSPACE) {
+ if (numChars > 0) {
+ numChars--;
+ }
+ } else if (numChars + 1 < MAX_CHARS) {
+ int index = keyToGlyphIndex(event.key.keysym);
+ if (index >= 0) {
+ glyphs[numChars++] = index;
+ }
+ }
+ break;
+ case SDL_MOUSEBUTTONUP:
+ /* mouse up toggles onscreen keyboard visibility */
+ if (SDL_IsTextInputActive()) {
+ SDL_StopTextInput();
+ } else {
+ SDL_StartTextInput();
+ }
+ break;
}
- break;
}
+
+ draw();
+ SDL_Delay(15);
}
- cleanup();
- return 0;
-}
-/* clean up after ourselves like a good kiddy */
-void
-cleanup(void)
-{
SDL_DestroyTexture(texture);
- SDL_Quit();
+ SDL_DestroyRenderer(renderer);
+ SDL_DestroyWindow(window);
+ return 0;
}
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