tip/ui/win32/text.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2025 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "text.h"

static W32WidgetClass textfield_widget_class = {
    .eventproc = ui_textfield_eventproc,
    .enable = w32_widget_default_enable,
    .show = w32_widget_default_show,
    .get_preferred_size = ui_textfield_get_preferred_size,
    .destroy  = w32_widget_default_destroy
};

UIWIDGET ui_textfield_create(UiObject *obj, UiTextFieldArgs *args) {
    HINSTANCE hInstance = GetModuleHandle(NULL);
    UiContainerPrivate *container = ui_obj_container(obj);
    HWND parent = ui_container_get_parent(container);
    UiLayout layout = UI_ARGS2LAYOUT(args);

    int width = args->width >= 0 ? args->width : 100;

    HWND hwnd = CreateWindowEx(
            WS_EX_CLIENTEDGE,
            "EDIT",
            "",
            WS_VISIBLE | WS_CHILD | ES_LEFT | ES_AUTOHSCROLL,
            0, 0, width, 25,
            parent,
            (HMENU)0,
            hInstance,
            NULL);
    ui_win32_set_ui_font(hwnd);

    W32Widget *widget = w32_widget_create(&textfield_widget_class, hwnd, sizeof(UiTextField));
    ui_container_add(container, widget, &layout);

    UiTextField *textfield = (UiTextField*)widget;
    textfield->width = width;
    textfield->widget.var = uic_widget_var(obj->ctx, obj->ctx, args->value, args->varname, UI_VAR_STRING);
    textfield->widget.callback = args->onchange;
    textfield->widget.callbackdata = args->onchangedata;

    if (textfield->widget.var) {
        UiString *s = textfield->widget.var->value;

        if (s->value.ptr) {
            // TODO: set textfield string
        }
        s->obj = widget;
        s->get = ui_textfield_get;
        s->set = ui_textfield_set;
    }

    return widget;
}

W32Size ui_textfield_get_preferred_size(W32Widget *widget) {
    UiTextField *textfield = (UiTextField *)widget;
    return (W32Size){ .width = textfield->width, .height = 32};
}

void ui_textfield_eventproc(W32Widget *widget, HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {

}

char* ui_textfield_get(UiString *s) {
    UiTextField *textfield = s->obj;

    if (s->value.free) {
        s->value.free(s->value.ptr);
    }

    int len = GetWindowTextLength(textfield->widget.widget.hwnd);
    s->value.ptr = calloc(len+1, 1);
    GetWindowText(textfield->widget.widget.hwnd, s->value.ptr, len+1);

    return s->value.ptr;
}

void ui_textfield_set(UiString *s, const char *value) {
    UiTextField *textfield = s->obj;
    if (s->value.free) {
        s->value.free(s->value.ptr);
    }
    s->value.ptr = NULL;
    SetWindowText(textfield->widget.widget.hwnd, value);
}