/**
* \brief plot event handler.
*
* This is the window event handler for plot widgets. It handles the two
* relevant event types sent to a plot's container window, i.e., drawing,
* and destroy events.
*
* \param win Window receiving the event.
* \param type The event type.
* \param data Custom data, depending on event type.
*
* \return True if the event was recognized and accepted.
*/
static bool wtk_plot_handler(struct win_window *win,
enum win_event_type type, void const *data)
{
struct win_clip_region const *clip;
struct win_area const *area;
struct wtk_plot *plot;
struct gfx_bitmap *background;
plot = (struct wtk_plot *)win_get_custom_data(win);
/* Window receiving the event should be the widget's containing window. */
Assert(win == plot->container);
switch (type) {
case WIN_EVENT_DRAW:
/* For DRAW events, the data parameter points to the clipping
* region. The window area parameter is needed because it
* contains the size of the widget.
*/
clip = (struct win_clip_region const *)data;
area = win_get_area(win);
background = plot->background;
if (background != NULL) {
/* Draw a window border. */
gfx_draw_rect(clip->origin.x, clip->origin.y,
area->size.x, area->size.y,
WTK_PLOT_BORDER_COLOR);
}
wtk_plot_grid_draw(plot, area, clip);
wtk_plot_draw(plot, area, clip);
/* Always accept DRAW events, as the return value is ignored
* anyway for that event type.
*/
return true;
case WIN_EVENT_DESTROY:
/* Free up all memory allocated by widget.
* The window is freed by the window system
*/
membag_free(plot->plot_buffer);
membag_free(plot);
return true;
default:
return false;
}
}
/**
* This function is the window event handler for check box widgets.
* It handles all events sent to the windows composing the widget.
*
* \param win Window receiving the event.
* \param type The event type.
* \param data Custom data, depending on event type.
*
* \return True if the event was recognized and accepted.
*/
static bool wtk_check_box_handler(struct win_window *win,
enum win_event_type type, void const *data)
{
struct win_command_event command;
/* Custom data for windows of a widget points back to the widget itself. */
struct wtk_check_box *check_box
= (struct wtk_check_box *)win_get_custom_data(win);
switch (type) {
case WIN_EVENT_DRAW:
{
/* There should not be other windows in this widget. */
Assert(win == check_box->container);
/* For DRAW events, the data parameter points to the
* clipping region.
*/
struct win_clip_region const *clip
= (struct win_clip_region const *)data;
/* Draw check box square. */
gfx_draw_rect(clip->origin.x + WTK_CHECKBOX_BOX_X,
clip->origin.y + WTK_CHECKBOX_BOX_Y,
WTK_CHECKBOX_BOX_SIZE,
WTK_CHECKBOX_BOX_SIZE,
WTK_CHECKBOX_BOX_COLOR);
/* Draw check box square background. */
if (WTK_CHECKBOX_BACKGROUND_COLOR != GFX_COLOR_TRANSPARENT) {
gfx_draw_filled_rect(clip->origin.x +
WTK_CHECKBOX_BOX_X + 1,
clip->origin.y +
WTK_CHECKBOX_BOX_Y + 1,
WTK_CHECKBOX_BOX_SIZE - 2,
WTK_CHECKBOX_BOX_SIZE - 2,
WTK_CHECKBOX_BACKGROUND_COLOR);
}
/* Draw check box select marker if selected. */
if (check_box->selected) {
gfx_draw_filled_rect(clip->origin.x +
WTK_CHECKBOX_BOX_X + 2,
clip->origin.y +
WTK_CHECKBOX_BOX_Y + 2,
WTK_CHECKBOX_BOX_SIZE - 4,
WTK_CHECKBOX_BOX_SIZE - 4,
WTK_CHECKBOX_SELECT_COLOR);
}
/* Draw caption. */
gfx_draw_string(check_box->caption,
clip->origin.x + WTK_CHECKBOX_CAPTION_X,
clip->origin.y + WTK_CHECKBOX_CAPTION_Y,
&sysfont,
GFX_COLOR_TRANSPARENT,
WTK_CHECKBOX_CAPTION_COLOR);
/* Always accept DRAW events, as the return value is
* ignored anyway for that event type.
*/
return true;
}
case WIN_EVENT_POINTER:
{
/* There should not be other windows in this widget. */
Assert(win == check_box->container);
/* For POINTER events, the data parameter points to the
* pointer event information.
*/
struct win_pointer_event const *event
= (struct win_pointer_event const *)data;
switch (event->type) {
case WIN_POINTER_PRESS:
/* When check box pressed, grab pointer and
* wait for release inside widget borders.
* Other widgets won't get pointer events
* before it is released, and the pointer
* ungrabbed by us.
*/
if (check_box->state == WTK_CHECKBOX_NORMAL) {
win_grab_pointer(check_box->container);
check_box->state = WTK_CHECKBOX_PRESSED;
win_redraw(check_box->container);
}
break;
case WIN_POINTER_RELEASE:
/* When check box released, take action only if
* released inside widget extents.
*/
if (check_box->state == WTK_CHECKBOX_PRESSED) {
bool is_inside;
/* Ungrab pointer. */
win_grab_pointer(NULL);
check_box->state = WTK_CHECKBOX_NORMAL;
win_redraw(check_box->container);
/* Check release position. */
is_inside = win_is_inside_window
(check_box->container,
&(event->pos));
/* Toggle check box if inside. */
if (is_inside) {
wtk_check_box_toggle(check_box);
/* Send non-zero command. */
if (check_box->command) {
command.sender
= check_box->container;
command.recipient
= check_box->container;
command.data
= check_box->command;
win_queue_command_event
(&command);
}
}
}
break;
default:
break;
}
/* Accept all POINTER events since all acitivity inside
* the widget extents is relevant to us.
*/
return true;
}
case WIN_EVENT_DESTROY:
/* There should not be other windows in this widget. */
Assert(win == check_box->container);
/* Memory allocated for windows will be automatically destroyed
* by the window system. We must destroy other allocations.
*/
membag_free(check_box->caption);
membag_free(check_box);
/* Always accept DESTROY events, as the return value is ignored
* anyway for that event type.
*/
return true;
default:
/* Reject unknown event types. */
return false;
}
}
/**
* \brief Slider event handler.
*
* This is the window event handler for slider widgets. It handles the three
* relevant event types sent to a slider's container window, i.e., drawing,
* pointer and destroy events.\par
*
* For POINTER events, the slider value is only updated when the pointer moves,
* and not upon press or release events. The handler will grab the pointer and
* allow for it to move outside the actual widget window and still control the
* slider knob.
*
* \param win Window receiving the event.
* \param type The event type.
* \param data Custom data, depending on event type.
*
* \return True if the event was recognized and accepted.
*/
static bool wtk_slider_handler(struct win_window *win, enum win_event_type type,
void const *data)
{
struct win_pointer_event const *event;
struct win_clip_region const *clip;
struct win_command_event command;
struct win_area const *area;
struct wtk_slider *slider;
struct win_point origin;
gfx_color_t knob_color;
gfx_coord_t position;
gfx_coord_t length;
uint8_t option;
uint8_t value;
bool send_command;
slider = (struct wtk_slider *)win_get_custom_data(win);
// There should not be other windows in this widget.
assert(win == slider->container);
switch (type) {
case WIN_EVENT_DRAW:
/* For DRAW events, the data parameter points to the
* clipping region.
*/
clip = (struct win_clip_region const *)data;
area = win_get_area(win);
option = slider->option;
if (slider->state == WTK_SLIDER_NORMAL) {
knob_color = WTK_SLIDER_KNOB_COLOR_NORMAL;
} else {
knob_color = WTK_SLIDER_KNOB_COLOR_MOVING;
}
// Draw slider frame border.
gfx_draw_rect(clip->origin.x,
clip->origin.y,
area->size.x,
area->size.y, WTK_SLIDER_BORDER_COLOR);
// Draw slider frame background within frame.
gfx_draw_filled_rect(clip->origin.x + 1,
clip->origin.y + 1,
area->size.x - 2,
area->size.y - 2, WTK_SLIDER_BACKGROUND_COLOR);
// Draw the slider knob according to configured orientation.
if (option & WTK_SLIDER_VERTICAL) {
// Draw slider knob border.
gfx_draw_rect(clip->origin.x,
clip->origin.y + slider->position,
area->size.x,
WTK_SLIDER_KNOB_WIDTH,
WTK_SLIDER_BORDER_COLOR);
// Draw slider knob.
gfx_draw_filled_rect(clip->origin.x + 1,
clip->origin.y + slider->position + 1,
area->size.x - 2,
WTK_SLIDER_KNOB_WIDTH - 2, knob_color);
} else {
gfx_draw_rect(clip->origin.x + slider->position,
clip->origin.y,
WTK_SLIDER_KNOB_WIDTH,
area->size.y, WTK_SLIDER_BORDER_COLOR);
gfx_draw_filled_rect(clip->origin.x + slider->position
+ 1,
clip->origin.y + 1,
WTK_SLIDER_KNOB_WIDTH - 2,
area->size.y - 2, knob_color);
}
/* Always accept DRAW events, as the return value is ignored
* anyway for that event type.
*/
return true;
case WIN_EVENT_POINTER:
/* For POINTER events, the data parameter points to the pointer
* event information.
*/
event = (struct win_pointer_event const *)data;
area = win_get_area(win);
option = slider->option;
send_command = false;
origin = slider->root_pos;
switch (event->type) {
case WIN_POINTER_PRESS:
/* Grab the pointer and redraw a highlighted slider.
* Slider value is not updated yet.
*/
if (slider->state == WTK_SLIDER_NORMAL) {
slider->state = WTK_SLIDER_MOVING;
win_grab_pointer(win);
win_redraw(win);
};
#if WTK_SLIDER_PARENT_MOVE_SUPPORT
// Update root position.
win_translate_win_to_root(win, &slider->root_pos);
#endif
break;
case WIN_POINTER_MOVE:
/* The slider is only updated when the pointer moves
* and the window was previously pressed. The pointer
* does not need to remain within the window to control
* the knob as only the position along the slider's
* direction of orientation is used.
*/
if (slider->state == WTK_SLIDER_MOVING) {
/* Get the position of the pointer relative to
* slider knob's origin, and the length of the
* slider itself.
*/
if (option & WTK_SLIDER_VERTICAL) {
position = event->pos.y - origin.y;
length = area->size.y;
} else {
position = event->pos.x - origin.x;
length = area->size.x;
}
// Subtract offsets due to slider knob size.
position -= WTK_SLIDER_KNOB_WIDTH / 2;
length -= WTK_SLIDER_KNOB_WIDTH;
/* Bound the value if pointer is outside window.
* Otherwise, compute the slider value from the
* knob position.
*/
if (position < 0) {
value = 0;
} else if (position > length) {
value = slider->maximum;
} else {
value = wtk_rescale_value(position,
length,
slider->maximum);
}
// Update slider only if this is a new value.
if (slider->value != value) {
slider->value = value;
/* Compute knob position from value to
* get correct positioning.
*/
slider->position =
wtk_rescale_value(value,
slider->maximum,
length);
if (option & WTK_SLIDER_CMD_MOVE) {
send_command = true;
}
win_redraw(win);
}
}
break;
case WIN_POINTER_RELEASE:
/* Release the pointer and redraw a normal slider.
* The slider's value is not updated. Hence, a pointer
* press directly followed by a release will leave the
* slider value unchanged.
*/
if (slider->state == WTK_SLIDER_MOVING) {
slider->state = WTK_SLIDER_NORMAL;
win_grab_pointer(NULL);
win_redraw(win);
if (option & WTK_SLIDER_CMD_RELEASE) {
send_command = true;
}
}
break;
default:
break;
}
// Prepare and send command, if it was flagged.
if (send_command) {
command.sender = slider->container;
command.recipient = slider->container;
command.data = slider->command;
win_queue_command_event(&command);
}
/* Accept all POINTER events since all acitivity inside the
* widget window is relevant.
*/
return true;
case WIN_EVENT_DESTROY:
/* Memory allocated for windows will be automatically destroyed
* by the window system. We must destroy other allocations.
*/
membag_free(slider);
/* Always accept DESTROY events, as the return value is ignored
* anyway for that event type.
*/
return true;
default:
// Reject unknown event types.
return false;
}
}
/**
* \brief Progress bar event handler.
*
* This is the window event handler for progress bar widgets. It handles the two
* relevant event types sent to a progress bar's container window, i.e.,
* drawing, and destroy events.
*
* \param win Window receiving the event.
* \param type The event type.
* \param data Custom data, depending on event type.
*
* \return True if the event was recognized and accepted.
*/
static bool wtk_progress_bar_handler(struct win_window *win,
enum win_event_type type, void const *data)
{
struct win_clip_region const *clip;
struct win_area const *area;
struct wtk_progress_bar *bar;
uint8_t position;
uint8_t option;
bar = (struct wtk_progress_bar *)win_get_custom_data(win);
/* Window receiving the event should be the widget's containing window. */
Assert(win == bar->container);
switch (type) {
case WIN_EVENT_DRAW:
/* For DRAW events, the data parameter points to the clipping
* region. The window area parameter is needed because it
* contains the size of the widget.
*/
clip = (struct win_clip_region const *)data;
area = win_get_area(win);
position = bar->position;
option = bar->option;
/* Draw a window border. */
gfx_draw_rect(clip->origin.x, clip->origin.y, area->size.x,
area->size.y, WTK_PROGRESS_BAR_BORDER_COLOR);
/* Draw progress bar interior according to orientation.
* An inverted progress bar is drawn in the same way as a
* non-inverted, as this option is handled in the functions
* for setting the bar's colors and value.
*/
if (option & WTK_PROGRESS_BAR_VERTICAL) {
/* Draw the top section of the bar. */
gfx_draw_filled_rect(clip->origin.x + 1,
clip->origin.y + 1,
area->size.x - 2,
position, bar->fill_color);
/* Draw the bottom section of the bar. */
gfx_draw_filled_rect(clip->origin.x + 1,
clip->origin.y + 1 + position,
area->size.x - 2,
area->size.y - 2 - position,
bar->background_color);
} else {
/* Draw the left section of the bar. */
gfx_draw_filled_rect(clip->origin.x + 1,
clip->origin.y + 1,
bar->position,
area->size.y - 2, bar->fill_color);
/* Draw the right section of the bar. */
gfx_draw_filled_rect(clip->origin.x + 1 + position,
clip->origin.y + 1,
area->size.x - 2 - position,
area->size.y - 2,
bar->background_color);
}
/* Always accept DRAW events, as the return value is ignored
* anyway for that event type.
*/
return true;
case WIN_EVENT_DESTROY:
/* Free up all memory allocated by widget.
* The window is freed by the window system
*/
membag_free(bar);
return true;
default:
return false;
}
}
/**
* This function is the window event handler for frame widgets.
* It handles all events sent to the windows composing the widget.
*
* \param win Window receiving the event.
* \param type The event type.
* \param data Custom data, depending on event type.
*
* \return True if the event was recognized and accepted.
*/
static bool wtk_frame_handler(struct win_window *win,
enum win_event_type type, void const *data)
{
/* Custom data for windows of a widget points back to the widget itself. */
struct wtk_frame *frame = (struct wtk_frame *)win_get_custom_data(win);
switch (type) {
case WIN_EVENT_DRAW:
{
/* For DRAW events, the data parameter points to the
* clipping region.
*/
struct win_clip_region const *clip
= (struct win_clip_region const *)data;
struct win_area const *area = win_get_area(win);
/* Draw frame decorations if this is the container window. */
if (win == frame->container) {
/* Draw left border. */
gfx_draw_filled_rect(clip->origin.x,
clip->origin.y,
WTK_FRAME_LEFTBORDER,
area->size.y,
WTK_FRAME_BORDER_COLOR);
/* Draw right border. */
gfx_draw_filled_rect(clip->origin.x +
area->size.x -
WTK_FRAME_RIGHTBORDER,
clip->origin.y,
WTK_FRAME_RIGHTBORDER,
area->size.y,
WTK_FRAME_BORDER_COLOR);
/* Draw top border. */
gfx_draw_filled_rect(clip->origin.x +
WTK_FRAME_LEFTBORDER,
clip->origin.y,
area->size.x -
WTK_FRAME_LEFTBORDER -
WTK_FRAME_RIGHTBORDER,
WTK_FRAME_TOPBORDER,
WTK_FRAME_BORDER_COLOR);
/* Draw bottom border. */
gfx_draw_filled_rect(clip->origin.x +
WTK_FRAME_LEFTBORDER,
clip->origin.y + area->size.y -
WTK_FRAME_BOTTOMBORDER,
area->size.x -
WTK_FRAME_LEFTBORDER -
WTK_FRAME_RIGHTBORDER,
WTK_FRAME_BOTTOMBORDER,
WTK_FRAME_BORDER_COLOR);
/* Draw title bar background. */
gfx_draw_filled_rect(clip->origin.x +
WTK_FRAME_LEFTBORDER,
clip->origin.y +
WTK_FRAME_TOPBORDER,
area->size.x -
WTK_FRAME_LEFTBORDER -
WTK_FRAME_RIGHTBORDER,
WTK_FRAME_TITLEBAR_HEIGHT,
WTK_FRAME_TITLEBAR_COLOR);
/* Draw caption string. */
gfx_draw_string(frame->caption,
clip->origin.x +
WTK_FRAME_LEFTBORDER +
WTK_FRAME_CAPTION_X,
clip->origin.y +
WTK_FRAME_TOPBORDER +
WTK_FRAME_CAPTION_Y, &sysfont,
GFX_COLOR_TRANSPARENT,
WTK_FRAME_CAPTION_COLOR);
}
/* Draw resize handle if this is the resize window. */
else if (win == frame->resize) {
gfx_draw_filled_circle(clip->origin.x +
area->size.x - 1,
clip->origin.y + area->size.y -
1, WTK_FRAME_RESIZE_RADIUS,
WTK_FRAME_RESIZE_COLOR,
GFX_QUADRANT1);
}
/* Always accept DRAW events, as the return value is
* ignored anyway for that event type.
*/
return true;
}
case WIN_EVENT_POINTER:
{
/* For POINTER events, the data parameter points to the
* pointer event information.
*/
struct win_pointer_event const *event
= (struct win_pointer_event const *)data;
/* Handle move if this is the container window. */
if (win == frame->container) {
switch (event->type) {
case WIN_POINTER_PRESS:
wtk_handle_frame_press(frame, event);
break;
case WIN_POINTER_MOVE:
wtk_handle_frame_move(frame, event);
break;
case WIN_POINTER_RELEASE:
wtk_handle_frame_release(frame, event);
break;
default:
break;
}
}
/* Handle resize if this is the resize handle. */
else if (win == frame->resize) {
switch (event->type) {
case WIN_POINTER_PRESS:
wtk_handle_resize_press(frame, event);
break;
case WIN_POINTER_MOVE:
wtk_handle_resize_move(frame, event);
break;
case WIN_POINTER_RELEASE:
wtk_handle_resize_release(frame, event);
break;
default:
break;
}
}
/* Accept all POINTER events so that it does not
* propagate up the window tree to our parent in case
* we did not click anything useful inside the frame.
*/
return true;
}
case WIN_EVENT_DESTROY:
{
/* When the container window is destroyed, also destroy
* the rest of the non-window frame allocations.
*/
if (win == frame->container) {
/* Memory allocated for windows will be
* automatically destroyed by the window
* system. We must destroy other allocations.
*/
membag_free(frame->caption);
membag_free(frame);
}
/* Always accept DESTROY events, as the return value is
* ignored anyway for that event type.
*/
return true;
}
case WIN_EVENT_COMMAND:
{
/* When commands are received either directly or
* propagated from child widgets and windows, send it
* to the frame handler.
*/
if (win == frame->container) {
if (frame->frame_handler) {
/* If the frame handler returns true,
* it wants us to destroy the frame.
* This is normally used by CLOSE
* buttons.
*/
bool shouldDestroy
= frame->frame_handler(frame,
(win_command_t)
data);
/* It is safe to destroy it here, since
* the event handling finished right
* after this handler returns, and no
* other references to this frame or
* its contents will be done.
*/
if (shouldDestroy) {
win_destroy(frame->container);
}
/* Accept the event if there was a
* handler installed.
*/
return true;
}
}
/* Reject the event if there was no handler, or this
* was not the container window at all.
*/
return false;
}
default:
/* Reject unknown event types. */
return false;
}
}
/**
* This function is the window event handler for radio button widgets.
* It handles all events sent to the windows composing the widget.
*
* \param win Window receiving the event.
* \param type The event type.
* \param data Custom data, depending on event type.
*
* \return True if the event was recognized and accepted.
*/
static bool wtk_radio_button_handler(struct win_window *win,
enum win_event_type type, void const *data)
{
struct win_command_event command;
/* Custom data for windows of a widget points back to the widget itself. */
struct wtk_radio_button *radio_button
= (struct wtk_radio_button *)win_get_custom_data(win);
switch (type) {
case WIN_EVENT_DRAW:
{
/* For DRAW events, the data parameter points to the
* clipping region.
*/
struct win_clip_region const *clip
= (struct win_clip_region const *)data;
/* There should not be other windows in this widget. */
Assert(win == radio_button->container);
/* Draw radio button circle. */
gfx_draw_circle(clip->origin.x +
WTK_RADIOBUTTON_BUTTON_X,
clip->origin.y +
WTK_RADIOBUTTON_BUTTON_Y,
WTK_RADIOBUTTON_RADIUS,
WTK_RADIOBUTTON_BUTTON_COLOR,
GFX_WHOLE);
/* Draw radio button filled circle background. */
if (WTK_RADIOBUTTON_BACKGROUND_COLOR != GFX_COLOR_TRANSPARENT) {
gfx_draw_filled_circle(clip->origin.x +
WTK_RADIOBUTTON_BUTTON_X,
clip->origin.y +
WTK_RADIOBUTTON_BUTTON_Y,
WTK_RADIOBUTTON_RADIUS - 1,
WTK_RADIOBUTTON_BACKGROUND_COLOR,
GFX_WHOLE);
}
/* Draw radio button select marker if selected. */
if (radio_button->group->selected == radio_button) {
gfx_draw_filled_circle(clip->origin.x +
WTK_RADIOBUTTON_BUTTON_X,
clip->origin.y +
WTK_RADIOBUTTON_BUTTON_Y,
WTK_RADIOBUTTON_RADIUS - 2,
WTK_RADIOBUTTON_SELECT_COLOR,
GFX_WHOLE);
}
/* Draw caption. */
gfx_draw_string(radio_button->caption,
clip->origin.x +
WTK_RADIOBUTTON_CAPTION_X,
clip->origin.y +
WTK_RADIOBUTTON_CAPTION_Y, &sysfont,
GFX_COLOR_TRANSPARENT,
WTK_RADIOBUTTON_CAPTION_COLOR);
/* Always accept DRAW events, as the return value is
* ignored anyway for that event type.
*/
return true;
}
case WIN_EVENT_POINTER:
{
/* There should not be other windows in this widget. */
Assert(win == radio_button->container);
/* For POINTER events, the data parameter points to the
* pointer event information.
*/
struct win_pointer_event const *event
= (struct win_pointer_event const *)data;
switch (event->type) {
case WIN_POINTER_PRESS:
/* When radio button pressed, grab pointer and
* wait for release inside widget borders.
* Other widgets won't get pointer events
* before it is released, and the pointer
* ungrabbed by us.
*/
if (radio_button->state ==
WTK_RADIOBUTTON_NORMAL) {
win_grab_pointer(radio_button->
container);
radio_button->state
= WTK_RADIOBUTTON_PRESSED;
win_redraw(radio_button->container);
}
break;
case WIN_POINTER_RELEASE:
/* When button released, take action only if
* released inside widget extents.
*/
if (radio_button->state ==
WTK_RADIOBUTTON_PRESSED) {
bool is_inside;
/* Ungrab pointer. */
win_grab_pointer(NULL);
radio_button->state
= WTK_RADIOBUTTON_NORMAL;
win_redraw(radio_button->container);
/* Check release position. */
is_inside = win_is_inside_window
(radio_button->
container,
&(event->pos));
/* Select this radio button if inside. */
if (is_inside) {
wtk_radio_button_select
(radio_button);
/* Send non-zero command. */
if (radio_button->command) {
command.sender
= radio_button->
container;
command.recipient
= radio_button->
container;
command.data
= radio_button->command;
win_queue_command_event
(&command);
}
}
}
break;
default:
break;
}
/* Accept all POINTER events since all acitivity inside
* the widget extents is relevant to us.
*/
return true;
}
case WIN_EVENT_DESTROY:
/* There should not be other windows in this widget. */
Assert(win == radio_button->container);
/* Memory allocated for windows will be automatically destroyed
* by the window system. We must destroy other allocations.
*/
membag_free(radio_button->caption);
/* Destroy radio group as well if we are the last one in the
* group. If not, remove ourselves from the group.
*/
--(radio_button->group->num_references);
if (!radio_button->group->num_references) {
membag_free(radio_button->group);
} else {
if (radio_button->group->selected == radio_button) {
radio_button->group->selected = NULL;
}
}
membag_free(radio_button);
/* Always accept DESTROY events, as the return value is ignored
* anyway for that event type.
*/
return true;
default:
/* Reject unknown event types. */
return false;
}
}
/**
* This function is the window event handler for icon button widgets.
* It handles all events sent to the windows composing the widget.
*
* \param win Window receiving the event.
* \param type The event type.
* \param data Custom data, depending on event type.
*
* \return True if the event was recognized and accepted.
*/
static bool wtk_icon_button_handler(struct win_window *win,
enum win_event_type type, void const *data)
{
struct win_command_event command;
/* Custom data for windows of a widget points back to the widget itself. */
struct wtk_icon_button *icon_button
= (struct wtk_icon_button *)win_get_custom_data(win);
switch (type) {
case WIN_EVENT_DRAW:
{
/* For DRAW events, the data parameter points to the
* clipping region.
*/
struct win_clip_region const *clip
= (struct win_clip_region const *)data;
struct win_area const *area = win_get_area(win);
/* There should not be other windows in this widget. */
Assert(win == icon_button->container);
/* Draw icon button select marker if selected. */
if (icon_button->group->selected == icon_button) {
gfx_draw_rect(clip->origin.x, clip->origin.y,
area->size.x, area->size.y,
WTK_ICONBUTTON_SELECT_COLOR);
}
/* Always accept DRAW events, as the return value is
* ignored anyway for that event type.
*/
return true;
}
case WIN_EVENT_POINTER:
{
/* There should not be other windows in this widget. */
Assert(win == icon_button->container);
/* For POINTER events, the data parameter points to the
* pointer event information.
*/
struct win_pointer_event const *event
= (struct win_pointer_event const *)data;
switch (event->type) {
case WIN_POINTER_PRESS:
/* When icon button pressed, grab pointer and
* wait for release inside widget borders.
* Other widgets won't get pointer events
* before it is released, and the pointer
* ungrabbed by us.
*/
if (icon_button->state ==
WTK_ICONBUTTON_NORMAL) {
win_grab_pointer(icon_button->container);
icon_button->state
= WTK_ICONBUTTON_PRESSED;
win_redraw(icon_button->container);
}
break;
case WIN_POINTER_RELEASE:
/* When button released, take action only if
* released inside widget extents.
*/
if (icon_button->state ==
WTK_ICONBUTTON_PRESSED) {
bool is_inside;
/* Ungrab pointer. */
win_grab_pointer(NULL);
icon_button->state
= WTK_ICONBUTTON_NORMAL;
win_redraw(icon_button->container);
/* Check release position. */
is_inside = win_is_inside_window
(icon_button->
container,
&(event->pos));
/* Select this icon button if inside. */
if (is_inside) {
wtk_icon_button_select
(icon_button);
/* Send non-zero command. */
if (icon_button->command) {
command.sender
= icon_button->
container;
command.recipient
= icon_button->
container;
command.data
= icon_button->command;
win_queue_command_event
(&command);
}
}
}
break;
default:
break;
}
/* Accept all POINTER events since all activity inside
* the widget extents is relevant to us.
*/
return true;
}
case WIN_EVENT_DESTROY:
/* There should not be other windows in this widget. */
Assert(win == icon_button->container);
/* Destroy icon group as well if we are the last one in the
* group. If not, remove ourselves from the group.
*/
--(icon_button->group->num_references);
if (!icon_button->group->num_references) {
membag_free(icon_button->group);
} else {
if (icon_button->group->selected == icon_button) {
icon_button->group->selected = NULL;
}
}
membag_free(icon_button);
/* Always accept DESTROY events, as the return value is ignored
* anyway for that event type.
*/
return true;
default:
/* Reject unknown event types. */
return false;
}
}
/**
* This function is the window event handler for label widgets.
* It handles all events sent to the windows composing the widget.
*
* \param win Window receiving the event.
* \param type The event type.
* \param data Custom data, depending on event type.
*
* \return True if the event was recognized and accepted.
*/
static bool wtk_label_handler(struct win_window *win,
enum win_event_type type, void const *data)
{
/* Custom data for windows of a widget points back to the widget itself. */
struct wtk_label *label = (struct wtk_label *)win_get_custom_data(win);
switch (type) {
case WIN_EVENT_DRAW:
{
/* There should not be other windows in this widget. */
Assert(win == label->container);
/* For DRAW events, the data parameter points to the
* clipping region.
*/
struct win_clip_region const *clip
= (struct win_clip_region const *)data;
struct win_area const *area = win_get_area(win);
if (label->align_right == false) {
/* Draw caption string. */
gfx_draw_string(label->caption,
clip->origin.x,
clip->origin.y,
&sysfont,
GFX_COLOR_TRANSPARENT,
label->text_color);
} else {
/* Get string size and draw the caption text right
* aligned. */
gfx_coord_t width;
gfx_coord_t height;
gfx_get_string_bounding_box(label->caption,
&sysfont, &width, &height);
gfx_draw_string(label->caption,
clip->origin.x + area->size.x -
width, clip->origin.y, &sysfont,
GFX_COLOR_TRANSPARENT,
label->text_color);
}
/* Always accept DRAW events, as the return value is
* ignored anyway for that event type.
*/
return true;
}
case WIN_EVENT_DESTROY:
/* There should not be other windows in this widget. */
Assert(win == label->container);
/* Memory allocated for windows will be automatically destroyed
* by the window system. We must destroy other allocations.
*/
membag_free(label->caption);
membag_free(label);
/* Always accept DESTROY events, as the return value is ignored
* anyway for that event type.
*/
return true;
default:
/* Reject unknown event types. */
return false;
}
}
/**
* This function is the window event handler for button widgets.
* It handles all events sent to the windows composing the widget.
*
* \param win Window receiving the event.
* \param type The event type.
* \param data Custom data, depending on event type.
*
* \return True if the event was recognized and accepted.
*/
static bool wtk_button_handler(struct win_window *win,
enum win_event_type type, void const *data)
{
/* Custom data for windows of a widget points back to the widget itself. */
struct wtk_button *button
= (struct wtk_button *)win_get_custom_data(win);
switch (type) {
case WIN_EVENT_DRAW:
{
/* For DRAW events, the data parameter points to the
* clipping region. */
struct win_clip_region const *clip
= (struct win_clip_region const *)data;
struct win_area const *area = win_get_area(win);
/* Preare background and caption colors depending on state of
* button. If pressed/highlighted, the colors are inverted. */
gfx_color_t background_color;
gfx_color_t caption_color;
/* There should not be other windows in this widget. */
Assert(win == button->container);
switch (button->state) {
case WTK_BUTTON_NORMAL:
background_color = WTK_BUTTON_BACKGROUND_COLOR;
caption_color = WTK_BUTTON_CAPTION_COLOR;
break;
case WTK_BUTTON_PRESSED:
background_color = WTK_BUTTON_CAPTION_COLOR;
caption_color = WTK_BUTTON_BACKGROUND_COLOR;
break;
default:
Assert(false);
background_color = WTK_BUTTON_BACKGROUND_COLOR;
caption_color = WTK_BUTTON_CAPTION_COLOR;
}
/* Draw background. */
gfx_draw_filled_rect(clip->origin.x, clip->origin.y,
area->size.x, area->size.y,
background_color);
/* Draw border. */
gfx_draw_rect(clip->origin.x, clip->origin.y,
area->size.x, area->size.y,
WTK_BUTTON_BORDER_COLOR);
/* Draw caption. */
gfx_draw_string_aligned(button->caption,
clip->origin.x + (area->size.x / 2),
clip->origin.y + (area->size.y / 2),
&sysfont, GFX_COLOR_TRANSPARENT, caption_color,
TEXT_POS_CENTER, TEXT_ALIGN_CENTER);
/* Always accept DRAW events, as the return value is
* ignored anyway for that event type.
*/
return true;
}
case WIN_EVENT_POINTER:
{
/* There should not be other windows in this widget. */
Assert(win == button->container);
/* For POINTER events, the data parameter points to the
* pointer event information.
*/
struct win_pointer_event const *event
= (struct win_pointer_event const *)data;
switch (event->type) {
case WIN_POINTER_PRESS:
/* When button pressed, grab pointer and wait
* for release inside button borders. Other
* widgets won't get pointer events before it
* is released, and the pointer ungrabbed by
* us.
*/
if (button->state == WTK_BUTTON_NORMAL) {
win_grab_pointer(button->container);
button->state = WTK_BUTTON_PRESSED;
win_redraw(button->container);
}
break;
case WIN_POINTER_RELEASE:
/* When button released, take action only if
* released inside widget extents.
*/
if (button->state == WTK_BUTTON_PRESSED) {
/* Ungrab pointer. */
win_grab_pointer(NULL);
button->state = WTK_BUTTON_NORMAL;
win_redraw(button->container);
/* Check release position. */
bool isInside = win_is_inside_window
(button->container,
&(event->pos));
/* Send command event if inside. */
if (isInside) {
struct win_command_event
command;
command.sender = button->
container;
command.recipient
= button->
container;
command.data = button->
command;
win_queue_command_event
(&command);
}
}
break;
default:
break;
}
/* Accept all POINTER events since all acitivity inside
* the widget extents is relevant to us.
*/
return true;
}
case WIN_EVENT_DESTROY:
{
/* There should not be other windows in this widget. */
Assert(win == button->container);
/* Memory allocated for windows will be automatically
* destroyed by the window system. We must destroy
* other allocations.
*/
membag_free(button->caption);
membag_free(button);
/* Always accept DESTROY events, as the return value is
* ignored anyway for that event type.
*/
return true;
}
default:
/* Reject unknown event types. */
return false;
}
}