mirror of
https://github.com/glfw/glfw.git
synced 2026-02-17 21:12:34 +01:00
Added support for custom system cursors.
This adds 3 functions to the GLFW API: glfwCreateCursor, glfwDestroyCursor and glfwSetCursor.
This commit is contained in:
urraka
283
tests/cursor.c
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283
tests/cursor.c
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//========================================================================
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// Cursor & input mode tests
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// Copyright (c) Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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//
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// System cursors and input modes tests.
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//
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//========================================================================
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#define GLFW_INCLUDE_GLU
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#include <GLFW/glfw3.h>
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#include <stdio.h>
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#include <stdlib.h>
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static int W = 640;
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static int H = 480;
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static int delay = 0;
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static GLFWwindow* windows[2] = {NULL, NULL};
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static GLFWwindow* activeWindow = NULL;
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static GLFWcursor* cursor = NULL;
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static struct { int key; double time; } commands[] = {
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{GLFW_KEY_H, 0},
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{GLFW_KEY_C, 0},
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{GLFW_KEY_D, 0},
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{GLFW_KEY_S, 0},
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{GLFW_KEY_N, 0},
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{GLFW_KEY_1, 0},
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{GLFW_KEY_2, 0},
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{GLFW_KEY_3, 0}
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};
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static int CommandCount = sizeof(commands) / sizeof(commands[0]);
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static struct { int w, h; } cursorSize[] = {
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{24, 24}, {13, 37}, {5, 53}, {43, 64}, {300, 300}
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};
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static int SizeCount = sizeof(cursorSize) / sizeof(cursorSize[0]);
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static int currentSize = 0;
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static void command_callback(int key)
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{
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switch (key)
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{
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case GLFW_KEY_H:
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{
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printf("H: show this help\n");
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printf("C: call glfwCreateCursor()\n");
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printf("D: call glfwDestroyCursor()\n");
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printf("S: call glfwSetCursor()\n");
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printf("N: call glfwSetCursor() with NULL\n");
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printf("1: set GLFW_CURSOR_NORMAL\n");
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printf("2: set GLFW_CURSOR_HIDDEN\n");
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printf("3: set GLFW_CURSOR_DISABLED\n");
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printf("T: enable 3s delay for all previous commands\n");
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}
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break;
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case GLFW_KEY_C:
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{
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if (cursor == NULL)
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{
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int w = cursorSize[currentSize].w;
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int h = cursorSize[currentSize].h;
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int x, y, i = 0;
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unsigned char *image = malloc(4 * w * h);
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for (y = 0; y < h; y++)
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{
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for (x = 0; x < w; x++)
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{
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image[i++] = 0xFF;
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image[i++] = 0;
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image[i++] = 255 * y / h;
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image[i++] = 255 * x / w;
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}
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}
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cursor = glfwCreateCursor(w, h, w / 2, h / 2, 0, image);
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currentSize = (currentSize + 1) % SizeCount;
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free(image);
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}
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}
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break;
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case GLFW_KEY_D:
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{
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if (cursor != NULL)
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{
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glfwDestroyCursor(cursor);
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cursor = NULL;
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}
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}
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break;
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case GLFW_KEY_S:
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{
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if (cursor != NULL)
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glfwSetCursor(activeWindow, cursor);
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else
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printf("The cursor is not created\n");
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}
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break;
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case GLFW_KEY_N:
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{
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glfwSetCursor(activeWindow, NULL);
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}
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break;
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case GLFW_KEY_1:
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{
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glfwSetInputMode(activeWindow, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
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}
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break;
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case GLFW_KEY_2:
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{
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glfwSetInputMode(activeWindow, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
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}
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break;
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case GLFW_KEY_3:
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{
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glfwSetInputMode(activeWindow, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
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}
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break;
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}
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}
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static void error_callback(int error, const char* description)
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{
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fprintf(stderr, "Error: %s\n", description);
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}
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static void framebuffer_size_callback(GLFWwindow* window, int width, int height)
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{
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W = width;
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H = height;
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glViewport(0, 0, W, H);
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}
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static void refresh_callback(GLFWwindow* window)
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{
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glfwMakeContextCurrent(window);
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glClearColor(0.0f, window == activeWindow ? 0.8f : 0.0f, 0.0f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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glfwSwapBuffers(window);
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}
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static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
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{
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if (action != GLFW_PRESS)
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return;
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switch (key)
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{
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case GLFW_KEY_ESCAPE:
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glfwSetWindowShouldClose(window, GL_TRUE);
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break;
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case GLFW_KEY_T:
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delay = !delay;
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printf("Delay %s.\n", delay ? "enabled" : "disabled");
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break;
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default:
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{
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if (delay)
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{
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int i = 0;
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while (i < CommandCount && commands[i].key != key)
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i++;
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if (i < CommandCount)
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commands[i].time = glfwGetTime();
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}
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else
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{
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command_callback(key);
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}
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}
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break;
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}
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}
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static void focus_callback(GLFWwindow* window, int focused)
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{
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if (focused)
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{
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activeWindow = window;
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refresh_callback(windows[0]);
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refresh_callback(windows[1]);
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}
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}
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int main(void)
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{
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int i;
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GLboolean running = GL_TRUE;
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glfwSetErrorCallback(error_callback);
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if (!glfwInit())
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exit(EXIT_FAILURE);
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for (i = 0; i < 2; i++)
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{
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windows[i] = glfwCreateWindow(W, H, "Cursor testing", NULL, NULL);
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if (!windows[i])
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{
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glfwTerminate();
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exit(EXIT_FAILURE);
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}
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glfwSetWindowPos(windows[i], 100 + (i & 1) * (W + 50), 100);
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glfwSetWindowRefreshCallback(windows[i], refresh_callback);
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glfwSetFramebufferSizeCallback(windows[i], framebuffer_size_callback);
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glfwSetKeyCallback(windows[i], key_callback);
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glfwSetWindowFocusCallback(windows[i], focus_callback);
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glfwMakeContextCurrent(windows[i]);
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glClear(GL_COLOR_BUFFER_BIT);
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glfwSwapBuffers(windows[i]);
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}
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activeWindow = windows[0];
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key_callback(NULL, GLFW_KEY_H, 0, GLFW_PRESS, 0);
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while (running)
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{
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if (delay)
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{
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int i;
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double t = glfwGetTime();
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for (i = 0; i < CommandCount; i++)
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{
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if (commands[i].time != 0 && t - commands[i].time >= 3.0)
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{
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command_callback(commands[i].key);
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commands[i].time = 0;
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}
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}
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}
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running = !(glfwWindowShouldClose(windows[0]) || glfwWindowShouldClose(windows[1]));
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glfwPollEvents();
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}
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glfwTerminate();
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exit(EXIT_SUCCESS);
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}
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