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Diffstat (limited to 'examples')
| -rw-r--r-- | examples/pugl_cursor_demo.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/examples/pugl_cursor_demo.c b/examples/pugl_cursor_demo.c new file mode 100644 index 0000000..244d22f --- /dev/null +++ b/examples/pugl_cursor_demo.c @@ -0,0 +1,171 @@ +/* + Copyright 2012-2020 David Robillard <d@drobilla.net> + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies. + + THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +/** + @file pugl_cursor_demo.c + @brief An example of changing the mouse cursor. +*/ + +#include "test/test_utils.h" + +#include "pugl/gl.h" +#include "pugl/pugl.h" +#include "pugl/pugl_gl.h" + +#include <stdbool.h> + +static const int N_CURSORS = 7; +static const int N_ROWS = 2; +static const int N_COLS = 4; + +typedef struct { + PuglTestOptions opts; + PuglWorld* world; + bool quit; +} PuglTestApp; + +static void +onConfigure(const double width, const double height) +{ + glEnable(GL_DEPTH_TEST); + glDepthFunc(GL_LESS); + glClearColor(0.2f, 0.2f, 0.2f, 1.0f); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glViewport(0, 0, (int)width, (int)height); +} + +static void +onExpose(void) +{ + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + glColor3f(0.6f, 0.6f, 0.6f); + + for (int row = 1; row < N_ROWS; ++row) { + const float y = (float)row * (2.0f / (float)N_ROWS) - 1.0f; + glBegin(GL_LINES); + glVertex2f(-1.0f, y); + glVertex2f(1.0f, y); + glEnd(); + } + + for (int col = 1; col < N_COLS; ++col) { + const float x = (float)col * (2.0f / (float)N_COLS) - 1.0f; + glBegin(GL_LINES); + glVertex2f(x, -1.0f); + glVertex2f(x, 1.0f); + glEnd(); + } +} + +static void +onMotion(PuglView* view, double x, double y) +{ + const PuglRect frame = puglGetFrame(view); + int row = (int)(y * N_ROWS / frame.height); + int col = (int)(x * N_COLS / frame.width); + + row = (row < 0) ? 0 : (row >= N_ROWS) ? (N_ROWS - 1) : row; + col = (col < 0) ? 0 : (col >= N_COLS) ? (N_COLS - 1) : col; + + const PuglCursor cursor = (PuglCursor)((row * N_COLS + col) % N_CURSORS); + puglSetCursor(view, cursor); +} + +static PuglStatus +onEvent(PuglView* view, const PuglEvent* event) +{ + PuglTestApp* app = (PuglTestApp*)puglGetHandle(view); + + printEvent(event, "Event: ", app->opts.verbose); + + switch (event->type) { + case PUGL_CONFIGURE: + onConfigure(event->configure.width, event->configure.height); + break; + case PUGL_KEY_PRESS: + if (event->key.key == 'q' || event->key.key == PUGL_KEY_ESCAPE) { + app->quit = 1; + } + break; + case PUGL_MOTION: + onMotion(view, event->motion.x, event->motion.y); + break; + case PUGL_EXPOSE: + onExpose(); + break; + case PUGL_CLOSE: + app->quit = 1; + break; + default: + break; + } + + return PUGL_SUCCESS; +} + +int +main(int argc, char** argv) +{ + PuglTestApp app = {0}; + + app.opts = puglParseTestOptions(&argc, &argv); + if (app.opts.help) { + puglPrintTestUsage(argv[0], ""); + return 1; + } + + app.world = puglNewWorld(PUGL_PROGRAM, 0); + + puglSetWorldHandle(app.world, &app); + puglSetClassName(app.world, "Pugl Test"); + + PuglView* view = puglNewView(app.world); + + puglSetWindowTitle(view, "Pugl Window Demo"); + puglSetDefaultSize(view, 512, 256); + puglSetMinSize(view, 128, 64); + puglSetBackend(view, puglGlBackend()); + + puglSetViewHint(view, PUGL_USE_DEBUG_CONTEXT, app.opts.errorChecking); + puglSetViewHint(view, PUGL_RESIZABLE, app.opts.resizable); + puglSetViewHint(view, PUGL_SAMPLES, app.opts.samples); + puglSetViewHint(view, PUGL_DOUBLE_BUFFER, app.opts.doubleBuffer); + puglSetViewHint(view, PUGL_SWAP_INTERVAL, app.opts.sync); + puglSetViewHint(view, PUGL_IGNORE_KEY_REPEAT, app.opts.ignoreKeyRepeat); + puglSetHandle(view, &app); + puglSetEventFunc(view, onEvent); + + const PuglStatus st = puglRealize(view); + if (st) { + return logError("Failed to create window (%s)\n", puglStrerror(st)); + } + + puglShowWindow(view); + + while (!app.quit) { + puglUpdate(app.world, -1.0); + } + + puglFreeView(view); + puglFreeWorld(app.world); + + return 0; +} |