+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <windows.h>
+#include "widgets.h"
+
+struct wgt_window {
+ HWND handle;
+ struct wgt_rect rect;
+
+ HDC dc;
+ char cname[32];
+ struct wgt_widget *wlist;
+};
+
+struct wgt_widget {
+ HWND handle;
+ struct wgt_rect rect;
+
+ struct wgt_window *win;
+ struct wgt_widget *next;
+
+ char **itemlist;
+ int num_items;
+
+ wgt_callback cb_click;
+ wgt_callback cb_modify;
+};
+
+
+static LRESULT WINAPI event_handler(HWND win, unsigned int msg, WPARAM wparam, LPARAM lparam);
+static struct wgt_widget *find_widget(struct wgt_window *win, HWND handle);
+
+struct wgt_window *wgt_window(const char *title, int width, int height)
+{
+ struct wgt_window *win;
+ int tlen;
+ WNDCLASS wc;
+ HINSTANCE hinst;
+ DWORD err;
+ RECT rect;
+
+ if(!(win = malloc(sizeof *win))) {
+ fprintf(stderr, "wgl_create_window: failed to allocate window structure\n");
+ return 0;
+ }
+ win->wlist = 0;
+
+ tlen = strlen(title);
+ if(tlen > sizeof win->cname - 10) {
+ tlen = sizeof win->cname - 10;
+ }
+ strcpy(win->cname, "WGTCLASS-");
+ memcpy(win->cname + 9, title, tlen);
+ win->cname[tlen + 9] = 0;
+
+ hinst = GetModuleHandle(0);
+
+ memset(&wc, 0, sizeof wc);
+ wc.hInstance = hinst;
+ wc.hbrBackground = (HBRUSH)GetStockObject(LTGRAY_BRUSH);
+ wc.hCursor = LoadCursor(0, IDC_ARROW);
+ wc.hIcon = LoadIcon(0, IDI_APPLICATION);
+ wc.lpszClassName = win->cname;
+ wc.lpfnWndProc = event_handler;
+ wc.cbWndExtra = 4;
+ if(!RegisterClass(&wc)) {
+ fprintf(stderr, "wgt_create_window: failed to register window class\n");
+ return 0;
+ }
+
+ if(!(win->handle = CreateWindow(win->cname, title, WS_OVERLAPPEDWINDOW,
+ CW_USEDEFAULT, CW_USEDEFAULT, width, height, 0, 0, hinst, 0))) {
+ fprintf(stderr, "wgt_create_window: failed to create window\n");
+ UnregisterClass(title, hinst);
+ return 0;
+ }
+ win->dc = GetDC(win->handle);
+ SetLastError(0);
+ if(!SetWindowLong(win->handle, GWL_USERDATA, (long)win) && (err = GetLastError())) {
+ fprintf(stderr, "wgt_create_window: failed to store window user data (err: %d)\n", err);
+ UnregisterClass(title, hinst);
+ DestroyWindow(win->handle);
+ return 0;
+ }
+ ShowWindow(win->handle, 1);
+
+ GetWindowRect(win->handle, &rect);
+
+ win->rect.x = rect.left;
+ win->rect.y = rect.top;
+ win->rect.width = rect.right - rect.left;
+ win->rect.height = rect.bottom - rect.top;
+
+ return win;
+}
+
+void wgt_destroy_window(struct wgt_window *win)
+{
+ while(win->wlist) {
+ struct wgt_widget *w = win->wlist;
+ win->wlist = win->wlist->next;
+ wgt_destroy_widget(w);
+ free(w);
+ }
+
+ ReleaseDC(win->handle, win->dc);
+ DestroyWindow(win->handle);
+ UnregisterClass(win->cname, GetModuleHandle(0));
+
+ free(win);
+}
+
+void wgt_destroy_widget(struct wgt_widget *w)
+{
+ DestroyWindow(w->handle);
+ free(w->itemlist);
+}
+
+struct wgt_window *wgt_widget_window(struct wgt_widget *w)
+{
+ return w->win;
+}
+
+struct wgt_rect *wgt_widget_rect(struct wgt_widget *w, struct wgt_rect *rect)
+{
+ if(rect) {
+ *rect = w->rect;
+ }
+ return &w->rect;
+}
+
+int wgt_xpos_after(struct wgt_widget *w, int pad)
+{
+ if(pad == WGT_AUTO) {
+ pad = 8;
+ }
+ return w->rect.x + w->rect.width + pad;
+}
+
+int wgt_ypos_after(struct wgt_widget *w, int pad)
+{
+ if(pad == WGT_AUTO) {
+ pad = 8;
+ }
+ return w->rect.y + w->rect.height + pad;
+}
+
+int wgt_string_size(struct wgt_window *win, const char *s, struct wgt_rect *rect)
+{
+ SIZE sz;
+
+ GetTextExtentPoint32(win->dc, (char*)s, strlen(s), &sz);
+ if(rect) {
+ rect->x = rect->y = 0;
+ rect->width = sz.cx;
+ rect->height = sz.cy;
+ }
+ return sz.cx;
+}
+
+
+struct wgt_widget *wgt_label(struct wgt_window *win, const char *text, int x, int y)
+{
+ struct wgt_widget *w;
+ struct wgt_rect textsz;
+
+ if(!(w = calloc(1, sizeof *w))) {
+ fprintf(stderr, "wgt_label: failed to allocate widget structure\n");
+ return 0;
+ }
+ w->win = win;
+
+ wgt_string_size(win, text, &textsz);
+
+ if(!(w->handle = CreateWindow("STATIC", text, WS_CHILD | WS_VISIBLE | SS_SIMPLE,
+ x, y, textsz.width, textsz.height, win->handle, 0, GetModuleHandle(0), 0))) {
+ fprintf(stderr, "wgt_label: failed to create window\n");
+ free(w);
+ return 0;
+ }
+
+ w->rect.x = x;
+ w->rect.y = y;
+ w->rect.width = textsz.width;
+ w->rect.height = textsz.height;
+
+ w->next = win->wlist;
+ win->wlist = w;
+ return w;
+}
+
+struct wgt_widget *wgt_button(struct wgt_window *win, const char *text, int x, int y,
+ int width, int height, wgt_callback clickfunc)
+{
+ struct wgt_widget *w;
+ struct wgt_rect textsz;
+
+ if(!(w = calloc(1, sizeof *w))) {
+ fprintf(stderr, "wgt_button: failed to allocate widget structure\n");
+ return 0;
+ }
+ w->win = win;
+
+ if(width < 0 || height < 0) {
+ wgt_string_size(win, text, &textsz);
+ if(width < 0) width = textsz.width * 5 / 3;
+ if(height < 0) height = textsz.height * 10 / 7;
+ }
+
+ if(!(w->handle = CreateWindow("BUTTON", text, WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
+ x, y, width, height, win->handle, 0, GetModuleHandle(0), 0))) {
+ fprintf(stderr, "wgt_button: failed to create window\n");
+ free(w);
+ return 0;
+ }
+
+ w->rect.x = x;
+ w->rect.y = y;
+ w->rect.width = width;
+ w->rect.height = height;
+
+ w->cb_click = clickfunc;
+ w->next = win->wlist;
+ win->wlist = w;
+ return w;
+}
+
+struct wgt_widget *wgt_checkbox(struct wgt_window *win, const char *text, int on,
+ int x, int y, int width, int height, wgt_callback modfunc)
+{
+ struct wgt_widget *w;
+ struct wgt_rect textsz;
+
+ if(!(w = calloc(1, sizeof *w))) {
+ fprintf(stderr, "wgt_checkbox: failed to allocate widget structure\n");
+ return 0;
+ }
+ w->win = win;
+
+ if(width < 0 || height < 0) {
+ wgt_string_size(win, text, &textsz);
+ if(width < 0) width = textsz.width + 32; /* XXX */
+ if(height < 0) height = textsz.height;
+ }
+
+ if(!(w->handle = CreateWindow("BUTTON", text, WS_CHILD | WS_VISIBLE | BS_AUTOCHECKBOX,
+ x, y, width, height, win->handle, 0, GetModuleHandle(0), 0))) {
+ fprintf(stderr, "wgt_checkbox: failed to create window\n");
+ free(w);
+ return 0;
+ }
+
+ w->rect.x = x;
+ w->rect.y = y;
+ w->rect.width = width;
+ w->rect.height = height;
+
+ w->cb_modify = modfunc;
+ w->next = win->wlist;
+ win->wlist = w;
+ return w;
+}
+
+struct wgt_widget *wgt_combo(struct wgt_window *win, const char **items, int num_items,
+ int sel, int x, int y, int width, int height, wgt_callback modfunc)
+{
+ int i, max_width, max_height, sum_height, res;
+ struct wgt_widget *w;
+ struct wgt_rect textsz;
+
+ if(!(w = calloc(1, sizeof *w))) {
+ fprintf(stderr, "wgt_combo: failed to allocate widget structure\n");
+ return 0;
+ }
+ w->win = win;
+
+ if(!(w->itemlist = malloc(num_items * sizeof *w->itemlist))) {
+ fprintf(stderr, "wgt_combo: failed to allocate item list\n");
+ free(w);
+ return 0;
+ }
+
+ max_width = max_height = sum_height = 0;
+
+ for(i=0; i<num_items; i++) {
+ wgt_string_size(win, items[i], &textsz);
+ if(textsz.width > max_width) max_width = textsz.width;
+ if(textsz.height > max_height) max_height = textsz.height;
+ sum_height += textsz.height;
+ }
+ if(width < 0) width = max_width * 3 / 2;
+ if(height < 0) height = sum_height * 2;
+
+
+ if(!(w->handle = CreateWindow("COMBOBOX", items[0],
+ WS_CHILD | WS_VISIBLE | CBS_DROPDOWNLIST | CBS_HASSTRINGS,
+ x, y, width, height, win->handle, 0, GetModuleHandle(0), 0))) {
+ fprintf(stderr, "wgt_combo: failed to create window\n");
+ free(w);
+ return 0;
+ }
+
+ for(i=0; i<num_items; i++) {
+ if(!(w->itemlist[i] = strdup(items[i]))) {
+ fprintf(stderr, "wgt_combo: failed to allocate item\n");
+ while(--i >= 0) free(w->itemlist[i]);
+ DestroyWindow(w->handle);
+ free(w->itemlist);
+ free(w);
+ return 0;
+ }
+ if((res = SendMessage(w->handle, CB_ADDSTRING, 0, (long)items[i])) != i) {
+ fprintf(stderr, "wgt_combo: failed to add item\n");
+ }
+ }
+ w->num_items = num_items;
+
+ if(sel < 0) sel = 0;
+ if(sel >= num_items) sel = num_items - 1;
+ SendMessage(w->handle, CB_SETCURSEL, sel, 0);
+
+ w->rect.x = x;
+ w->rect.y = y;
+ w->rect.width = width;
+ w->rect.height = max_height;
+
+ w->cb_modify = modfunc;
+ w->next = win->wlist;
+ win->wlist = w;
+ return w;
+}
+
+int wgt_combo_selected(struct wgt_widget *w)
+{
+ int sel = SendMessage(w->handle, CB_GETCURSEL, 0, 0);
+ if(sel == CB_ERR) return -1;
+ return sel;
+}
+
+const char *wgt_get_combo_item(struct wgt_widget *w, int idx)
+{
+ if(idx < 0 || idx >= w->num_items) {
+ return 0;
+ }
+ return w->itemlist[idx];
+}
+
+static LRESULT WINAPI event_handler(HWND wnd, unsigned int msg, WPARAM wparam, LPARAM lparam)
+{
+ int ncode;
+ struct wgt_widget *w;
+ struct wgt_window *win;
+
+ win = (struct wgt_window*)GetWindowLong(wnd, GWL_USERDATA);
+
+ switch(msg) {
+ case WM_CLOSE:
+ case WM_DESTROY:
+ PostQuitMessage(0);
+ break;
+
+ case WM_COMMAND:
+ if(!win || !(w = find_widget(win, (HWND)lparam))) {
+ break;
+ }
+ ncode = HIWORD(wparam);
+
+ switch(ncode) {
+ case BN_CLICKED:
+ if(w->cb_click) {
+ w->cb_click(w);
+ }
+ break;
+
+ case CBN_SELCHANGE:
+ if(w->cb_modify) {
+ w->cb_modify(w);
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ default:
+ return DefWindowProc(wnd, msg, wparam, lparam);
+ }
+ return 0;
+}
+
+static struct wgt_widget *find_widget(struct wgt_window *win, HWND handle)
+{
+ struct wgt_widget *w;
+
+ w = win->wlist;
+ while(w) {
+ if(w->handle == handle) return w;
+ w = w->next;
+ }
+ return 0;
+}
\ No newline at end of file
projects / instimg / commitdiff