ui/win32/container.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 "container.h"
#include "grid.h"

#include "../common/context.h"
#include "../common/container.h"
#include "../motif/container.h"


static W32WidgetClass grid_layout_widget_class = {
    .eventproc = ui_grid_widget_event,
    .enable = NULL,
    .show = w32_widget_default_show,
    .get_preferred_size = ui_grid_layout_get_preferred_size,
    .destroy  = w32_widget_default_destroy
};

UiContainerPrivate* ui_obj_container(UiObject *obj) {
    return (UiContainerPrivate*)obj->container_end;
}

HWND ui_container_get_parent(UiContainerPrivate *ctn) {
    return ctn->parent ? ctn->parent(ctn) : ctn->hwnd;
}

void ui_container_add(UiContainerPrivate *ctn, W32Widget *widget, UiLayout *layout) {
    UiLayout layout2 = *layout;
    if (layout2.margin > 0) {
        layout2.margin_left = layout2.margin;
        layout2.margin_right = layout2.margin;
        layout2.margin_top = layout2.margin;
        layout2.margin_bottom = layout2.margin;
    }
    ctn->add(ctn, widget, &layout2);
    ctn->container.newline = FALSE;
}

int ui_grid_widget_event(W32Widget *widget, HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    if (uMsg == WM_ERASEBKGND) {
        HDC hdc = (HDC)wParam;
        UiGridWidget *grid = (UiGridWidget*)widget;
        RECT rc;
        GetClientRect(hwnd, &rc);
        FillRect(hdc, &rc, grid->brush);
        return 1;
    }
    return 0;
}

W32Size ui_grid_layout_get_preferred_size(W32Widget *widget) {
    UiGridLayout *grid = widget->layoutmanager;
    W32Size size;
    size.width = grid->preferred_width;
    size.height = grid->preferred_height;
    return size;
}


/* ---------------------------- Box Container ---------------------------- */

static UIWIDGET box_create(UiObject *obj, UiContainerArgs *args, UiBoxOrientation orientation) {
    return NULL;
}

// public
UIWIDGET ui_vbox_create(UiObject *obj, UiContainerArgs *args) {
    return box_create(obj, args, UI_BOX_VERTICAL);
}

// public
UIWIDGET ui_hbox_create(UiObject *obj, UiContainerArgs *args) {
    return box_create(obj, args, UI_BOX_HORIZONTAL);
}

UiContainerX* ui_box_container_create(UiObject *obj, HWND hwnd, UiBoxOrientation orientation, short spacing, GridEdgeInsets padding) {
    UiBoxContainer *container = cxZalloc(obj->ctx->allocator, sizeof(UiBoxContainer));
    container->container.hwnd = hwnd;
    container->container.add = ui_box_container_add;
    container->layout = ui_grid_layout_create(obj->ctx->allocator, spacing, spacing);
    container->layout->padding = padding;
    container->orientation = orientation;
    return (UiContainerX*)container;
}

void ui_box_container_add(UiContainerPrivate *ctn, W32Widget *widget, UiLayout *layout) {
    UiBoxContainer *box = (UiBoxContainer*)ctn;
    GridLayoutInfo gridLayout = (GridLayoutInfo) {
        .margin = (GridEdgeInsets) { layout->margin_top, layout->margin_bottom, layout->margin_left, layout->margin_right },
    };
    if (box->orientation == UI_BOX_HORIZONTAL) {
        gridLayout.vexpand = TRUE;
        gridLayout.vfill = TRUE;
        gridLayout.hexpand = layout->fill;
        gridLayout.hfill = layout->fill;
    } else {
        gridLayout.hexpand = TRUE;
        gridLayout.hfill = TRUE;
        gridLayout.vexpand = layout->fill;
        gridLayout.vfill = layout->fill;
    }
    ui_grid_add_widget(box->layout, box->x, box->y, widget, &gridLayout);
    if (box->orientation == UI_BOX_HORIZONTAL) {
        box->x++;
    } else {
        box->y++;
    }
}

/* ---------------------------- Grid Container ---------------------------- */

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

    HWND hwnd = CreateWindowEx(
            0,
            TEXT("STATIC"),
            NULL,
            WS_CHILD | WS_VISIBLE,
            0, 0, 300, 300,
            parent,
            NULL,
            hInstance,
            NULL);
    SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)ui_default_eventproc);

    UiGridWidget *widget = w32_widget_create(&grid_layout_widget_class, hwnd, sizeof(UiGridWidget));
    ui_container_add(container, (W32Widget*)widget, &layout);

    UiContainerX *gridContainer = ui_grid_container_create(obj, hwnd, args->columnspacing, args->rowspacing, INSETS_ZERO);
    uic_object_push_container(obj, gridContainer);

    UiGridLayoutContainer *grid = (UiGridLayoutContainer*)gridContainer;
    widget->widget.layout = (W32LayoutFunc)ui_grid_layout;
    widget->widget.layoutmanager = grid->layout;
    widget->brush = GetSysColorBrush(COLOR_BTNFACE);
    grid->layout->preferred_width = 200;
    grid->layout->preferred_height = 200;

    return (W32Widget*)widget;
}

UiContainerX* ui_grid_container_create(UiObject *obj, HWND hwnd, short columnspacing, short rowspacing, GridEdgeInsets padding) {
    UiGridLayoutContainer *container = cxZalloc(obj->ctx->allocator, sizeof(UiGridLayoutContainer));
    container->container.hwnd = hwnd;
    container->container.add = ui_grid_container_add;
    container->layout = ui_grid_layout_create(obj->ctx->allocator, columnspacing, rowspacing);
    container->layout->padding = padding;
    return (UiContainerX*)container;
}

void ui_grid_container_add(UiContainerPrivate *ctn, W32Widget *widget, UiLayout *layout) {
    UiGridLayoutContainer *grid = (UiGridLayoutContainer*)ctn;
    if (ctn->container.newline) {
        grid->y++;
        grid->x = 0;
    }

    uic_layout_setup_expand_fill(layout, grid->def_hexpand, grid->def_vexpand, grid->def_hfill, grid->def_vfill);
    GridLayoutInfo gridLayout = (GridLayoutInfo) {
        .margin = (GridEdgeInsets) { layout->margin_top, layout->margin_bottom, layout->margin_left, layout->margin_right },
        .colspan = layout->colspan,
        .rowspan = layout->rowspan,
        .hexpand = layout->hexpand,
        .vexpand = layout->vexpand,
        .hfill = layout->hfill,
        .vfill = layout->vfill,
    };
    ui_grid_add_widget(grid->layout, grid->x, grid->y, widget, &gridLayout);

    grid->x++;
}


/* ---------------------------- Container Helper ---------------------------- */

void ui_container_begin_close(UiObject *obj) {
    UiContainerX *ct = obj->container_end;
    ct->close = 1;
}

int ui_container_finish(UiObject *obj) {
    UiContainerX *ct = obj->container_end;
    if(ct->close) {
        ui_end_new(obj);
        return 0;
    }
    return 1;
}